[Objective] This study was conducted to breed excellent-quality high-yield lines of pink flesh pitaya. [Method] 156 seedling progenies of ＇Conghua Zhixing＇ pink flesh pitaya cultivar were cultivated. Then the growth...[Objective] This study was conducted to breed excellent-quality high-yield lines of pink flesh pitaya. [Method] 156 seedling progenies of ＇Conghua Zhixing＇ pink flesh pitaya cultivar were cultivated. Then the growth character, the high yield character, the fruit economic traits and interior quality were analyzed and compared. [Results] The best one which was marked as 80-1 was selected by the comprehen- sive quality. [Conclusion] It has attractive fruit surface, high quality and high yield.展开更多
[Objective]The aim was to describe the extraction of polysaccharides from pitaya stems.[Method]The hot water,enzyme-assisted and microwave-assisted methods were used,with the microwave-assisted extraction being deemed...[Objective]The aim was to describe the extraction of polysaccharides from pitaya stems.[Method]The hot water,enzyme-assisted and microwave-assisted methods were used,with the microwave-assisted extraction being deemed optimal by general evaluation.[Result]The main factors affecting the yield of polysaccharides in the microwave-assisted extraction,by order of magnitude,were as follows:time >microwave power >temperature;additionally,optimal conditions included a 10 min extraction time,an 80℃ extraction temperature and a microwave setting of 200 W.Using these optimal conditions,the yield of PSPS(Polysaccharides from Pitaya Stems) was 1.42%.After purification,the yield of PSPS was 0.74%.[Conclusion]The PSPS was analyzed by IR,MALDI-TOF-MS and an element analysis technique.It was shown to be a polysaccharide mixture,and the molecular weight was between 3 900 and 4 300 Da.展开更多
Pitaya de mayo (<i>Stenocereus pruinosus</i>) exportation is considered feasible especially to the United States of America (USA) using the adequate preservation and transportation techniques. One of the e...Pitaya de mayo (<i>Stenocereus pruinosus</i>) exportation is considered feasible especially to the United States of America (USA) using the adequate preservation and transportation techniques. One of the exportation requirements is that pitayas, as well as any other tropical fruits, have to be free from Mexican fruit fly contamination and certified by the Food National Sanitary, Iniquity, and Quality Service. This review proved that this fruit is not attacked by the Mexican fruit fly <i>A. ludens</i> or any other Anastrepha species. The fruit fly may <span>be found in some States of Mexican Republic such as some tropical regions bu</span>t not in the semi-arid regions where cacti fruits are grown.展开更多
With the adjustment of the tropical and subtropical fruit industry organizations in southern China, the Hylocereus undatus(pitaya) industry is growing rapidly in subtropical Guangxi and other places. Guangxi is also t...With the adjustment of the tropical and subtropical fruit industry organizations in southern China, the Hylocereus undatus(pitaya) industry is growing rapidly in subtropical Guangxi and other places. Guangxi is also the largest natural selenium-rich region in the country, and selenium-enriched pitaya is increasingly sought after by the general public. This paper described in detail the selection of selenium-enriched pitaya production fields, key planting techniques and core selenium enrichment techniques, with a view to providing technical guidance for the standardized production of selenium-enriched pitaya and providing technical support for improving the quality and efficiency of pitaya production in natural selenium-rich areas.展开更多
With the expansion of cultivation scale,pitaya diseases are gradually increasing.Traditionally relying on human observation to judge the disease is limited by the skills and experience of the observer,which cannot gua...With the expansion of cultivation scale,pitaya diseases are gradually increasing.Traditionally relying on human observation to judge the disease is limited by the skills and experience of the observer,which cannot guarantee the accuracy and real-time of the judgment,and consumes much manpower and time.In this study,by collecting,segmenting,and labeling images of 4 main diseases of pitaya in the field,an image database of main diseases of pitaya in the field was constructed to provide a basis for computer image recognition of pitaya diseases.Thereby,it benefits reducing manual error and improving the accuracy and real-time of disease identification for agricultural production,but also lays a foundation for the future development of intelligent agriculture.展开更多
Alginate is a widely used polymer matrix in food industry since it allows formation of spherical, soft, and strong membranes adequate for encapsulation of a large amount of products, including food. The flow rate of a...Alginate is a widely used polymer matrix in food industry since it allows formation of spherical, soft, and strong membranes adequate for encapsulation of a large amount of products, including food. The flow rate of alginate solutions and the permeability of the capsules were evaluated within an acidic-low acidic pH range and different alginate concentrations. In solutions adjusted at different pH （3.0 to 7.0） with concentrations of alginate of 0.8, 1.0, and 1.2% w/v, flow rates at 20 ℃ were 6.95 to 10.00, 4.54-5.35, and 2.60-2.80 mL sl, respectively. Permeability of the capsules was evaluated in terms of the diffusion of H＋ions （expressed as pH） and soluble solids （~Brix）. Meanwhile both diffusions were minor at 4.0 〈 pH 〈 7.0 and were significantly superior at more acidic pH （P 〈 0.05）, alginate concentration did not present significant effect. Yellow, purple, and red juices from Stenocereus spp. fruits （pitayas） were encapsulated using 1.0% of alginate and stored with isotonic solution （3 mL g^-1） at 4 ℃ in the dark. The capsules were spherical with diameter between 4.59 and 470 mm, weight from 82.60 to 97.50 rag, and volume of 0.075-0.098 mL. Pigment （total betalains content） diffusion reached equilibrium at 24 h of storage, at which point retentions of total betalains in the yellow, purple, and red capsules were 87.79, 96.13, and 85.13%, respectively. Also, changes in the color of the capsules were observed during storage.展开更多
基金Supported by Guangdong Science and Technology Plan Project(2010B-020410002015)Guangzhou Science and Technology Plan Project(2014Y2-00164)~~
文摘[Objective] This study was conducted to breed excellent-quality high-yield lines of pink flesh pitaya. [Method] 156 seedling progenies of ＇Conghua Zhixing＇ pink flesh pitaya cultivar were cultivated. Then the growth character, the high yield character, the fruit economic traits and interior quality were analyzed and compared. [Results] The best one which was marked as 80-1 was selected by the comprehen- sive quality. [Conclusion] It has attractive fruit surface, high quality and high yield.
文摘[Objective]The aim was to describe the extraction of polysaccharides from pitaya stems.[Method]The hot water,enzyme-assisted and microwave-assisted methods were used,with the microwave-assisted extraction being deemed optimal by general evaluation.[Result]The main factors affecting the yield of polysaccharides in the microwave-assisted extraction,by order of magnitude,were as follows:time >microwave power >temperature;additionally,optimal conditions included a 10 min extraction time,an 80℃ extraction temperature and a microwave setting of 200 W.Using these optimal conditions,the yield of PSPS(Polysaccharides from Pitaya Stems) was 1.42%.After purification,the yield of PSPS was 0.74%.[Conclusion]The PSPS was analyzed by IR,MALDI-TOF-MS and an element analysis technique.It was shown to be a polysaccharide mixture,and the molecular weight was between 3 900 and 4 300 Da.
文摘Pitaya de mayo (<i>Stenocereus pruinosus</i>) exportation is considered feasible especially to the United States of America (USA) using the adequate preservation and transportation techniques. One of the exportation requirements is that pitayas, as well as any other tropical fruits, have to be free from Mexican fruit fly contamination and certified by the Food National Sanitary, Iniquity, and Quality Service. This review proved that this fruit is not attacked by the Mexican fruit fly <i>A. ludens</i> or any other Anastrepha species. The fruit fly may <span>be found in some States of Mexican Republic such as some tropical regions bu</span>t not in the semi-arid regions where cacti fruits are grown.
基金Supported by Guangxi Innovation-driven Development Science and Technology Major Project(GK AA17202026,GK AA17202037)Scientific Research and Technology Development Program of Nanning City(20182100)+2 种基金Guangxi Key Research and Development Program(GK AB16380164)Guangxi Selenium-enriched Crop Experiment Station(GTS2016011)Fundamental Scientific Research Fund of Guangxi Academy of Agricultural Sciences(GNK 2017YZ03)
文摘With the adjustment of the tropical and subtropical fruit industry organizations in southern China, the Hylocereus undatus(pitaya) industry is growing rapidly in subtropical Guangxi and other places. Guangxi is also the largest natural selenium-rich region in the country, and selenium-enriched pitaya is increasingly sought after by the general public. This paper described in detail the selection of selenium-enriched pitaya production fields, key planting techniques and core selenium enrichment techniques, with a view to providing technical guidance for the standardized production of selenium-enriched pitaya and providing technical support for improving the quality and efficiency of pitaya production in natural selenium-rich areas.
基金the Key Research and Development Project of Hainan Province of China(ZDYF2017066)Natural Science Foundation of Hainan Province of China(619MS028)the Research on Education and Teaching Reform of Hainan University(hdjy1954)。
文摘With the expansion of cultivation scale,pitaya diseases are gradually increasing.Traditionally relying on human observation to judge the disease is limited by the skills and experience of the observer,which cannot guarantee the accuracy and real-time of the judgment,and consumes much manpower and time.In this study,by collecting,segmenting,and labeling images of 4 main diseases of pitaya in the field,an image database of main diseases of pitaya in the field was constructed to provide a basis for computer image recognition of pitaya diseases.Thereby,it benefits reducing manual error and improving the accuracy and real-time of disease identification for agricultural production,but also lays a foundation for the future development of intelligent agriculture.
文摘Alginate is a widely used polymer matrix in food industry since it allows formation of spherical, soft, and strong membranes adequate for encapsulation of a large amount of products, including food. The flow rate of alginate solutions and the permeability of the capsules were evaluated within an acidic-low acidic pH range and different alginate concentrations. In solutions adjusted at different pH （3.0 to 7.0） with concentrations of alginate of 0.8, 1.0, and 1.2% w/v, flow rates at 20 ℃ were 6.95 to 10.00, 4.54-5.35, and 2.60-2.80 mL sl, respectively. Permeability of the capsules was evaluated in terms of the diffusion of H＋ions （expressed as pH） and soluble solids （~Brix）. Meanwhile both diffusions were minor at 4.0 〈 pH 〈 7.0 and were significantly superior at more acidic pH （P 〈 0.05）, alginate concentration did not present significant effect. Yellow, purple, and red juices from Stenocereus spp. fruits （pitayas） were encapsulated using 1.0% of alginate and stored with isotonic solution （3 mL g^-1） at 4 ℃ in the dark. The capsules were spherical with diameter between 4.59 and 470 mm, weight from 82.60 to 97.50 rag, and volume of 0.075-0.098 mL. Pigment （total betalains content） diffusion reached equilibrium at 24 h of storage, at which point retentions of total betalains in the yellow, purple, and red capsules were 87.79, 96.13, and 85.13%, respectively. Also, changes in the color of the capsules were observed during storage.
