The Chinese traditional medicine,agarwood,is a commonly used medicine for regulating qi,which has many clinical applications because of its unique curative effect.In this study,CiteSpace software was used to visually ...The Chinese traditional medicine,agarwood,is a commonly used medicine for regulating qi,which has many clinical applications because of its unique curative effect.In this study,CiteSpace software was used to visually analyze the application and development trend of agarwood in the literature from CNKI website in the period of 2007-2022.The analysis results showed that the research on agarwood has basically formed core groups of authors,and universities and their affiliated hospitals are main publishing institutions.Moreover,in this study,several research directions of agarwood were also summarized,including clinical research,chemical composition,structural identification and quality standards,showing that agarwood has rich and flexible application prospects in many aspects.On this basis,several suggestions were put forward:strengthening the cooperation between universities and research institutes and building a scientific research cooperation community,and promoting the combination of clinical research and laboratory research.展开更多
Background:Agarwood,primarily derived from the Aquilaria and Gyrinops genera,holds significant economic importance.However,there is a lack of comprehensive investigations providing guidance to importing nations regard...Background:Agarwood,primarily derived from the Aquilaria and Gyrinops genera,holds significant economic importance.However,there is a lack of comprehensive investigations providing guidance to importing nations regarding cultivation quantities and expected yields of Agarwood from distinct species.This study aims to address this gap by exploring the historical context and trade evolution of Agarwood,highlighting its global importance,and the challenges associated with securing accurate species information.Method:On-site visits to Agarwood cultivation sites were conducted to gain a nuanced understanding of Aquilaria species and their cultivation requirements.Additionally,a thorough analysis of global export and import data for Agarwood products over the last decade was undertaken.Results:China Mainland emerged as the leading exporter of Agarwood,averaging an annual export value of USD 1 million.India’s substantial exports challenge the prevailing notion of limited Agarwood production within its borders.Hong Kong and Singapore are pivotal distribution hubs,while Hong Kong and Taipei feature prominently as import destinations.Our analysis uncovers anomalies in the representation of Agarwood producers from 2001 to 2008,suggesting potential misclassification of Aquilaria Agarwood as Gyrinops in global export information.These findings underscore the urgency of investigating classification and reporting practices in the Agarwood trade.Furthermore,A.filaria emerges as a notable source,while A.malaccensis is decline in prominence.Conclusion:This study provides crucial insights for policymakers,stakeholders,and industry players seeking to make informed decisions in the Agarwood trade landscape.The results highlight the need for accurate species identification,classification,and reporting practices to ensure sustainable cultivation and trade of Agarwood.展开更多
Agarwood is the resinous heartwood of Aquilaria species.However,low yields and high costs of existing stimulation methods have led to the need for new techniques to produce agarwood rapidly and effectively.We develope...Agarwood is the resinous heartwood of Aquilaria species.However,low yields and high costs of existing stimulation methods have led to the need for new techniques to produce agarwood rapidly and effectively.We developed a biological agarwood-inducing technique(Agar-Bit)that produces high yields and quality within 6 months.To better understand agarwood formation by Agar-Bit,dynamic gene expressions of key synthetases pathways of sesquiterpenes and chalcone-related enzymes at different times were determined after both Agar-Bit and the traditional burning chisel drilling(BCD)stimulation on Aquilaria sinensis trees.The qRT-PCR results show that some characteristic synthase genes were expressed at greatly different levels and times compared with the controls.For the Agar-Bit technology,main changes were after the 3rd or 5th month,while BCD expression clearly changed at the 5th month.Essential oils and total chromone contents were simultaneously determined.In the Agar-Bit group,both were higher and similar to natural levels.The Agar-Bit methodology is a new option for producing agarwood as demonstrated by genetic and chemical aspects.The differences in gene expression within 6 months for both groups indicates that the mechanisms of the two methods are different.These findings provide information on genetic variation during the process of agarwood formation.展开更多
Agarwood, the resinous product of Aquilaria spp.(Thymelaeaceae), is highly valued for medicinal and fragrant purposes. Unsustainable forest harvesting contributes to the declining population in the wild, threatening t...Agarwood, the resinous product of Aquilaria spp.(Thymelaeaceae), is highly valued for medicinal and fragrant purposes. Unsustainable forest harvesting contributes to the declining population in the wild, threatening their existence. As a protection effort, cultivation occurred in range countries, mainly in Asia, effectively establishing mass plantations. The success of domesticating Aquilaria relies heavily on technological advancement in agarwood induction, without which the entire thriving industry will collapse. In this paper, we describe efforts since 1929 and current progress and variation in induction as practiced in Asia. The methods include traditional practices and artificial induction via inoculum and chemical inducer, experimented and patented or otherwise. Artificial induction methods are being developed to intensify agarwood production in terms of yield and quality. While traditional methods are commonly applied by rural planters, artificial methods with the use of specific agents/chemicals are seen as more appealing for inducing agarwood, and have a higher demand from entrepreneurs and plantation owners.Several issues related to induction technology faced by stakeholders in agarwood cultivation are presented, such as safety levels, cost, yields, and quality. We conclude by highlighting remaining challenges in induction methods and their associated technologies.展开更多
Gyrinops walla Gaertn. is the only species growing in Sri Lanka that belongs to the agarwood family,Thymelaeaceae. Although agarwood resin induction and extraction from Aquilaria species of the same family have been p...Gyrinops walla Gaertn. is the only species growing in Sri Lanka that belongs to the agarwood family,Thymelaeaceae. Although agarwood resin induction and extraction from Aquilaria species of the same family have been practised for many decades in Southeast Asian region,the ability of producing agarwood resins in G. walla was discovered recently. Since previous studies were on agarwood resins formed due to natural causes, the present study was conducted to identify the potential fungal species that are capable of artificially inducing agarwood resin formation in G. walla. Since this is the first ever study conducted on artificial inducement of agarwood resin formation in G.walla, Aspergillus niger and Fusarium solani were selected owing to their high abundance in the naturally formed agarwood resinous tissues collected from 25 G. walla trees.Both fungal species were separately grown in yeast extract glucose agar and used to inoculate healthy G. walla trees under aseptic conditions. Three holes were made for each tree and 2 g of fungal culture including the medium were placed in each hole. Tissue discoloration, characteristic aroma, resin content and resin constituents were checked at10 cm intervals above and below the inoculation points for a period of 1 year. Results revealed that tissue discoloration and resin content were higher in the trees inoculated with A. niger. Other than at 10 cm above and below the inoculation points, samples collected at all locations had significantly higher resin contents when inoculated with A. niger compared to F. solani. Sixteen agarwood resin constituents, which were also recorded in Aquilaria species, were identified from the discolored tissues using GC–MS analysis. Jinkohol, agarospirol and 2(2-phenyl)chromone derivatives were found in all discolored tissues collected at 10-cm intervals of the trees inoculated with both fungi. b-Seline, c-eudesmol and valerenal were found in nine of 10 sample points on the stem. c-Elemene was recorded only in one sample. The characteristic aroma during burning was stronger for dark-colored tissues than the light-colored ones. The present study confirmed the potential use of certain fungal species to induce agarwood resin in G. walla and that A. niger is more effective than F.solani.展开更多
Agarwood is studied as the resinous secondary metabolites produced by the natural microbial infection. The current study investigated the range of microbial infection in agarwood trees collected from various parts of ...Agarwood is studied as the resinous secondary metabolites produced by the natural microbial infection. The current study investigated the range of microbial infection in agarwood trees collected from various parts of India. A total of 17 isolates were collected and identified based on the morphological and molecular studies. The study revealed that the agarwood was naturally infected with Aspergillus, Lasiodiploidia, Chaetomium, Fusarium and Penicillium species. Further studies on enzyme activities involved in the pathogenesis process showed the higher cellulase, ligninolytic and laccase activities in Aspergillus isolate AR13 when compared to other isolates. The current study has offered a potential opportunity to further strengthen the research on possible development of microbial strains for artificial inoculation in agar trees to induce agarwood formation.展开更多
Agarwood is a non-timber forest product found in tropical rain forests.It is a black and fragrant resin valued for the perfume industry and demand continues to increase.However,the Indonesian agarwood-producing specie...Agarwood is a non-timber forest product found in tropical rain forests.It is a black and fragrant resin valued for the perfume industry and demand continues to increase.However,the Indonesian agarwood-producing species,Aquilaria malaccensis and Gyrinops versteegii do not automatically produce such quality resin.Bio-induction technology or inoculation using Fusarium solani is usually applied to these species to trigger resin production.This research aims to identify agarwood compounds formed in seedlings and trees of A.malaccensis and G.versteegii after these species were inoculated with the fungus F.solani.The chemical compounds were identified by comparing the patterns of mass spectra fragmentation in the sample and in previous studies.Five groups of agarwood compounds were identified:(1)sesquiterpen group-cisjasmone and aromadendrenepoxide;(2)chromones group-8-methoxy-2-(2-phenylethyl)chromen-4-one and newly-discovered chromone derivative,7-(benzyloxy)-5-hydroxy-2-methylchromone found only in G.versteegii;(3)aromatic group-benzylacetone,guaiacol,p-ethylguaiacol,phenol,syringaldehyde,vanilin,furfuryl alcohol,and furfural;(4)fatty acid group-palmitic acid,oleic acid,and lauric acid;and,(5)triterpen group-squalene.展开更多
For establishing the favourable media for growth of Phaeoacremonium parasiticum, the fungus was inoculated in five different media (Potato Dextrose Broth (PDB), Host Extract (50%) + PDB (50%) (HE + PDB), and the solid...For establishing the favourable media for growth of Phaeoacremonium parasiticum, the fungus was inoculated in five different media (Potato Dextrose Broth (PDB), Host Extract (50%) + PDB (50%) (HE + PDB), and the solid media viz., Rice Bran (RB), Maize Meal (MM) and Wheat Bran (WB)) at pH of 6.5 and incubated at a temperature of 30℃± 1℃. The solid media were added with water at the rate of 70 ml/100g of solid substrate. After 30 days of inoculation, conidial population of P. parasiticum in liquid media was lower compared to conidial population in solid media. In solid media, MM media showed the highest conidial population (9.56 log·cfu/g) followed by WB (9.50 log·cfu/g) and RB (9.38 log·cfu/g). Hence, Maize Meal media (MM: Water = 100 g:70 ml) at pH of 6.5, incubation temperature: 30℃± 1℃for 30 days would be the standard technique for mass production of P. parasiticum.展开更多
Agarwood has the mixed scent of ambergris and sandalwood, and cannot be artificially synthesized. Due to massive logging, agarwood is now listed as an endangered plant. Agarwood tissue culture can save provenance for ...Agarwood has the mixed scent of ambergris and sandalwood, and cannot be artificially synthesized. Due to massive logging, agarwood is now listed as an endangered plant. Agarwood tissue culture can save provenance for breeding. For different combinations of TDZ (Thidiazuron), BA (6-Benzylaminopurine), and activated carbon of different concentrations, this study used the six sigma, as well as design of experiment (DOE) and response surface methodology (RSM) to optimize agarwood adventitious buds induced incidences and growth numbers. The results showed that, the combination of 4.0 ppm TDZ and 0.5 ppm BA, without activated carbon, had the best effect of adventitious bud induced incidence up to 21.75%, and adventitious bud growth number up to 24.8, improvements of 35.29% and 42.78%, respectively. The results verified that using the six sigma methodology could effectively enhance the induction of agarwood tissue culture adventitious buds, promote the blooming of agarwood in large numbers, and further realize agarwood restoration.展开更多
Agarwood from Aquilaria plants, also known as Chen Xiang (沉香), is traditionally used for the treatment of abdominal pain and as a sedative. Because of the great demand and the rareness of agarwood, extensive harvest...Agarwood from Aquilaria plants, also known as Chen Xiang (沉香), is traditionally used for the treatment of abdominal pain and as a sedative. Because of the great demand and the rareness of agarwood, extensive harvesting of Aquilaria plants has nearly led to the extinction of the species. To fully utilize this resource, the use of different parts of Aquilaria needs to be investigated. This article will focus on the pharmacological properties and the mechanism of action of different parts of Aquilaria plants.展开更多
Objective: Agarwood—a resinous wood produced by Aquilaria plants in response to injury or artificial induction—is a valuable medicinal and fragrance resource. Whole-Tree Agarwood-Inducing Technique(Agar-WIT) has bee...Objective: Agarwood—a resinous wood produced by Aquilaria plants in response to injury or artificial induction—is a valuable medicinal and fragrance resource. Whole-Tree Agarwood-Inducing Technique(Agar-WIT) has been widely used to produce agarwood. However, the time-dependent characteristics of agarwood formation induced by Agar-WIT are yet to be clarified. To promote technologically efficient utilization and upgradation of Agar-WIT, the dynamic process and mechanism of agarwood formation were analyzed for one year.Methods: Agarwood formation percentage, barrier layer microscopic properties, extract levels, compound level, and characteristic chromatograms of agarwood were examined by referring to the Chinese Pharmacopeia(2020 version).Results: Agar-WIT could maintain a high percentage of agarwood formation over one year compared with that of healthy plants. Alcohol-soluble extract and agarotetrol levels showed fluctuating cyclic changes with peaks occurring first during the fifth and sixth months, and subsequently in the 11th month.Aquilaria trees subjected to Agar-WIT treatment for 1–12 months showed significant characteristics of a dynamic agarwood formation process. The barrier layer began to appear in the fourth month after treatment. Alcohol-soluble extractive levels in agarwood formed in the second month, and thereafter,exceeded 10.0%, and agarotetrol in agarwood produced after four months or later, exceeded 0.10%.Conclusion: According to the Chinese Pharmacopoeia, alcohol-soluble extractive levels in agarwood should not be less than 10.0% and agarotetrol level should exceed 0.10%. After four months of Agar-WIT treatment, the formed agarwood theoretically met these standards and was suitable for developed and utilization. However, the optimal harvest time was found to be the 11th month, followed by the sixth month after Agar-WIT treatment. Therefore, Agar-WIT resulted in swift agarwood formation and stable accumulation of alcohol-soluble extracts and agarotetrol. Thus, this method is efficient for large-scale cultivation of Aquilaria sinensis to produce agarwood and provide raw materials for the agarwood medicinal industry.展开更多
Agarwood is an important non-timber forest product widely used in religious and cultural activities as perfume and fragrance and as traditional medicine in Asia. The high value of agarwood and the inflated consuming m...Agarwood is an important non-timber forest product widely used in religious and cultural activities as perfume and fragrance and as traditional medicine in Asia. The high value of agarwood and the inflated consuming market have led to constant rising of the prices. In general, the price of the agarwood is determined according to its quality, which can be divided into different grades. But up to now, there is not any standard quality grading system which could be used overwhelmingly throughout the agarwood producing, commerce and consumption. Therefore, we reviewed agarwood in diversified grading indexes, systems and methods.展开更多
基金Supported by Undergraduate Training Program for Innovation and Entrepreneurship of Guangxi University of Chinese Medicine (S202310600135S202310600049).
文摘The Chinese traditional medicine,agarwood,is a commonly used medicine for regulating qi,which has many clinical applications because of its unique curative effect.In this study,CiteSpace software was used to visually analyze the application and development trend of agarwood in the literature from CNKI website in the period of 2007-2022.The analysis results showed that the research on agarwood has basically formed core groups of authors,and universities and their affiliated hospitals are main publishing institutions.Moreover,in this study,several research directions of agarwood were also summarized,including clinical research,chemical composition,structural identification and quality standards,showing that agarwood has rich and flexible application prospects in many aspects.On this basis,several suggestions were put forward:strengthening the cooperation between universities and research institutes and building a scientific research cooperation community,and promoting the combination of clinical research and laboratory research.
基金Jiangxi Province Double Thousand Talent-Leader of Natural Science Project(jxsq2023101038)Jiangxi Province Urgently Overseas Talent Project(2022BCJ25027)+1 种基金The Key Research Projects in Jiangxi Province(20223BBH8007&20232BBG70014)Innovation Team Project in Key Areas of Jiujiang City Base and Talent Plan(S2022TDJS029).
文摘Background:Agarwood,primarily derived from the Aquilaria and Gyrinops genera,holds significant economic importance.However,there is a lack of comprehensive investigations providing guidance to importing nations regarding cultivation quantities and expected yields of Agarwood from distinct species.This study aims to address this gap by exploring the historical context and trade evolution of Agarwood,highlighting its global importance,and the challenges associated with securing accurate species information.Method:On-site visits to Agarwood cultivation sites were conducted to gain a nuanced understanding of Aquilaria species and their cultivation requirements.Additionally,a thorough analysis of global export and import data for Agarwood products over the last decade was undertaken.Results:China Mainland emerged as the leading exporter of Agarwood,averaging an annual export value of USD 1 million.India’s substantial exports challenge the prevailing notion of limited Agarwood production within its borders.Hong Kong and Singapore are pivotal distribution hubs,while Hong Kong and Taipei feature prominently as import destinations.Our analysis uncovers anomalies in the representation of Agarwood producers from 2001 to 2008,suggesting potential misclassification of Aquilaria Agarwood as Gyrinops in global export information.These findings underscore the urgency of investigating classification and reporting practices in the Agarwood trade.Furthermore,A.filaria emerges as a notable source,while A.malaccensis is decline in prominence.Conclusion:This study provides crucial insights for policymakers,stakeholders,and industry players seeking to make informed decisions in the Agarwood trade landscape.The results highlight the need for accurate species identification,classification,and reporting practices to ensure sustainable cultivation and trade of Agarwood.
基金supported by Grant Number NDRC2011-51 from the National Development and Reform Commission(NDRC),the Office of New High-Tech Industrial Developmentsupported by Grant Number18A36002 from Key project of institutions of colleges and universities in Henan province,Henan Education Department。
文摘Agarwood is the resinous heartwood of Aquilaria species.However,low yields and high costs of existing stimulation methods have led to the need for new techniques to produce agarwood rapidly and effectively.We developed a biological agarwood-inducing technique(Agar-Bit)that produces high yields and quality within 6 months.To better understand agarwood formation by Agar-Bit,dynamic gene expressions of key synthetases pathways of sesquiterpenes and chalcone-related enzymes at different times were determined after both Agar-Bit and the traditional burning chisel drilling(BCD)stimulation on Aquilaria sinensis trees.The qRT-PCR results show that some characteristic synthase genes were expressed at greatly different levels and times compared with the controls.For the Agar-Bit technology,main changes were after the 3rd or 5th month,while BCD expression clearly changed at the 5th month.Essential oils and total chromone contents were simultaneously determined.In the Agar-Bit group,both were higher and similar to natural levels.The Agar-Bit methodology is a new option for producing agarwood as demonstrated by genetic and chemical aspects.The differences in gene expression within 6 months for both groups indicates that the mechanisms of the two methods are different.These findings provide information on genetic variation during the process of agarwood formation.
基金supported by Universiti Putra Malaysia under the Putra Grant scheme(GP-IPS/2017/9554600)
文摘Agarwood, the resinous product of Aquilaria spp.(Thymelaeaceae), is highly valued for medicinal and fragrant purposes. Unsustainable forest harvesting contributes to the declining population in the wild, threatening their existence. As a protection effort, cultivation occurred in range countries, mainly in Asia, effectively establishing mass plantations. The success of domesticating Aquilaria relies heavily on technological advancement in agarwood induction, without which the entire thriving industry will collapse. In this paper, we describe efforts since 1929 and current progress and variation in induction as practiced in Asia. The methods include traditional practices and artificial induction via inoculum and chemical inducer, experimented and patented or otherwise. Artificial induction methods are being developed to intensify agarwood production in terms of yield and quality. While traditional methods are commonly applied by rural planters, artificial methods with the use of specific agents/chemicals are seen as more appealing for inducing agarwood, and have a higher demand from entrepreneurs and plantation owners.Several issues related to induction technology faced by stakeholders in agarwood cultivation are presented, such as safety levels, cost, yields, and quality. We conclude by highlighting remaining challenges in induction methods and their associated technologies.
基金financially supported by the University of Sri Jayewardenepura,Sri Lanka and Sadaharitha Plantations Limited,Sri Lanka
文摘Gyrinops walla Gaertn. is the only species growing in Sri Lanka that belongs to the agarwood family,Thymelaeaceae. Although agarwood resin induction and extraction from Aquilaria species of the same family have been practised for many decades in Southeast Asian region,the ability of producing agarwood resins in G. walla was discovered recently. Since previous studies were on agarwood resins formed due to natural causes, the present study was conducted to identify the potential fungal species that are capable of artificially inducing agarwood resin formation in G. walla. Since this is the first ever study conducted on artificial inducement of agarwood resin formation in G.walla, Aspergillus niger and Fusarium solani were selected owing to their high abundance in the naturally formed agarwood resinous tissues collected from 25 G. walla trees.Both fungal species were separately grown in yeast extract glucose agar and used to inoculate healthy G. walla trees under aseptic conditions. Three holes were made for each tree and 2 g of fungal culture including the medium were placed in each hole. Tissue discoloration, characteristic aroma, resin content and resin constituents were checked at10 cm intervals above and below the inoculation points for a period of 1 year. Results revealed that tissue discoloration and resin content were higher in the trees inoculated with A. niger. Other than at 10 cm above and below the inoculation points, samples collected at all locations had significantly higher resin contents when inoculated with A. niger compared to F. solani. Sixteen agarwood resin constituents, which were also recorded in Aquilaria species, were identified from the discolored tissues using GC–MS analysis. Jinkohol, agarospirol and 2(2-phenyl)chromone derivatives were found in all discolored tissues collected at 10-cm intervals of the trees inoculated with both fungi. b-Seline, c-eudesmol and valerenal were found in nine of 10 sample points on the stem. c-Elemene was recorded only in one sample. The characteristic aroma during burning was stronger for dark-colored tissues than the light-colored ones. The present study confirmed the potential use of certain fungal species to induce agarwood resin in G. walla and that A. niger is more effective than F.solani.
文摘Agarwood is studied as the resinous secondary metabolites produced by the natural microbial infection. The current study investigated the range of microbial infection in agarwood trees collected from various parts of India. A total of 17 isolates were collected and identified based on the morphological and molecular studies. The study revealed that the agarwood was naturally infected with Aspergillus, Lasiodiploidia, Chaetomium, Fusarium and Penicillium species. Further studies on enzyme activities involved in the pathogenesis process showed the higher cellulase, ligninolytic and laccase activities in Aspergillus isolate AR13 when compared to other isolates. The current study has offered a potential opportunity to further strengthen the research on possible development of microbial strains for artificial inoculation in agar trees to induce agarwood formation.
基金The work was supported by SEAMEO-BIOTROP Indonesia with a special Grant to Dr.Ulfah J.Siregar.
文摘Agarwood is a non-timber forest product found in tropical rain forests.It is a black and fragrant resin valued for the perfume industry and demand continues to increase.However,the Indonesian agarwood-producing species,Aquilaria malaccensis and Gyrinops versteegii do not automatically produce such quality resin.Bio-induction technology or inoculation using Fusarium solani is usually applied to these species to trigger resin production.This research aims to identify agarwood compounds formed in seedlings and trees of A.malaccensis and G.versteegii after these species were inoculated with the fungus F.solani.The chemical compounds were identified by comparing the patterns of mass spectra fragmentation in the sample and in previous studies.Five groups of agarwood compounds were identified:(1)sesquiterpen group-cisjasmone and aromadendrenepoxide;(2)chromones group-8-methoxy-2-(2-phenylethyl)chromen-4-one and newly-discovered chromone derivative,7-(benzyloxy)-5-hydroxy-2-methylchromone found only in G.versteegii;(3)aromatic group-benzylacetone,guaiacol,p-ethylguaiacol,phenol,syringaldehyde,vanilin,furfuryl alcohol,and furfural;(4)fatty acid group-palmitic acid,oleic acid,and lauric acid;and,(5)triterpen group-squalene.
文摘For establishing the favourable media for growth of Phaeoacremonium parasiticum, the fungus was inoculated in five different media (Potato Dextrose Broth (PDB), Host Extract (50%) + PDB (50%) (HE + PDB), and the solid media viz., Rice Bran (RB), Maize Meal (MM) and Wheat Bran (WB)) at pH of 6.5 and incubated at a temperature of 30℃± 1℃. The solid media were added with water at the rate of 70 ml/100g of solid substrate. After 30 days of inoculation, conidial population of P. parasiticum in liquid media was lower compared to conidial population in solid media. In solid media, MM media showed the highest conidial population (9.56 log·cfu/g) followed by WB (9.50 log·cfu/g) and RB (9.38 log·cfu/g). Hence, Maize Meal media (MM: Water = 100 g:70 ml) at pH of 6.5, incubation temperature: 30℃± 1℃for 30 days would be the standard technique for mass production of P. parasiticum.
文摘Agarwood has the mixed scent of ambergris and sandalwood, and cannot be artificially synthesized. Due to massive logging, agarwood is now listed as an endangered plant. Agarwood tissue culture can save provenance for breeding. For different combinations of TDZ (Thidiazuron), BA (6-Benzylaminopurine), and activated carbon of different concentrations, this study used the six sigma, as well as design of experiment (DOE) and response surface methodology (RSM) to optimize agarwood adventitious buds induced incidences and growth numbers. The results showed that, the combination of 4.0 ppm TDZ and 0.5 ppm BA, without activated carbon, had the best effect of adventitious bud induced incidence up to 21.75%, and adventitious bud growth number up to 24.8, improvements of 35.29% and 42.78%, respectively. The results verified that using the six sigma methodology could effectively enhance the induction of agarwood tissue culture adventitious buds, promote the blooming of agarwood in large numbers, and further realize agarwood restoration.
文摘Agarwood from Aquilaria plants, also known as Chen Xiang (沉香), is traditionally used for the treatment of abdominal pain and as a sedative. Because of the great demand and the rareness of agarwood, extensive harvesting of Aquilaria plants has nearly led to the extinction of the species. To fully utilize this resource, the use of different parts of Aquilaria needs to be investigated. This article will focus on the pharmacological properties and the mechanism of action of different parts of Aquilaria plants.
基金supported by the funding from the National Key Research and Development Project of China (2018YFC1706400)。
文摘Objective: Agarwood—a resinous wood produced by Aquilaria plants in response to injury or artificial induction—is a valuable medicinal and fragrance resource. Whole-Tree Agarwood-Inducing Technique(Agar-WIT) has been widely used to produce agarwood. However, the time-dependent characteristics of agarwood formation induced by Agar-WIT are yet to be clarified. To promote technologically efficient utilization and upgradation of Agar-WIT, the dynamic process and mechanism of agarwood formation were analyzed for one year.Methods: Agarwood formation percentage, barrier layer microscopic properties, extract levels, compound level, and characteristic chromatograms of agarwood were examined by referring to the Chinese Pharmacopeia(2020 version).Results: Agar-WIT could maintain a high percentage of agarwood formation over one year compared with that of healthy plants. Alcohol-soluble extract and agarotetrol levels showed fluctuating cyclic changes with peaks occurring first during the fifth and sixth months, and subsequently in the 11th month.Aquilaria trees subjected to Agar-WIT treatment for 1–12 months showed significant characteristics of a dynamic agarwood formation process. The barrier layer began to appear in the fourth month after treatment. Alcohol-soluble extractive levels in agarwood formed in the second month, and thereafter,exceeded 10.0%, and agarotetrol in agarwood produced after four months or later, exceeded 0.10%.Conclusion: According to the Chinese Pharmacopoeia, alcohol-soluble extractive levels in agarwood should not be less than 10.0% and agarotetrol level should exceed 0.10%. After four months of Agar-WIT treatment, the formed agarwood theoretically met these standards and was suitable for developed and utilization. However, the optimal harvest time was found to be the 11th month, followed by the sixth month after Agar-WIT treatment. Therefore, Agar-WIT resulted in swift agarwood formation and stable accumulation of alcohol-soluble extracts and agarotetrol. Thus, this method is efficient for large-scale cultivation of Aquilaria sinensis to produce agarwood and provide raw materials for the agarwood medicinal industry.
基金National Natural Science Foundation of China(No.81403055,81303312)Science&Technology Programs from Hainan Province of China(No.ZDKJ2016004)CAMS Initiative for Innovative Medicine(CAMS-I2M-2-003)
文摘Agarwood is an important non-timber forest product widely used in religious and cultural activities as perfume and fragrance and as traditional medicine in Asia. The high value of agarwood and the inflated consuming market have led to constant rising of the prices. In general, the price of the agarwood is determined according to its quality, which can be divided into different grades. But up to now, there is not any standard quality grading system which could be used overwhelmingly throughout the agarwood producing, commerce and consumption. Therefore, we reviewed agarwood in diversified grading indexes, systems and methods.
