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De Novo Transcriptome Analysis in Hevea brasiliensis to Unveil Genes Involved in Low Temperature Stress Response
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作者 Bingsong Yang Xiaomeng Shi +1 位作者 Tingting Guo Meixia Liang 《Phyton-International Journal of Experimental Botany》 SCIE 2023年第2期559-575,共17页
Low temperature is one of the adversities threatening the growth and development and reduces the yield of rubber trees.However,molecular mechanisms toward rubber trees in response to low temperature are largely unclea... Low temperature is one of the adversities threatening the growth and development and reduces the yield of rubber trees.However,molecular mechanisms toward rubber trees in response to low temperature are largely unclear.In this study,7,159 and 7,600 differentially expressed genes(DEGs)were identified in‘Reyan 73397’rubber trees.Through GO analysis,the catalytic activity was the representative of the GO term in the only DEGs at the two studied temperatures(room temperature and 4°C,respectively),while KEGG analysis showed that carbon metabolism was the most important grouping under the comparison of these two temperatures.In addition,expression of 9 members of transcription factor MYB family genes were further verified by qRT-PCR,and MYB family genes may play important roles in the regulation of rubber trees under low temperature stress.This study provided a theoretical foundation for(1)revealing the molecular mechanisms of rubber trees in response to low temperature and(2)breeding of tolerant varieties of rubber trees. 展开更多
关键词 Hevea brasiliensis low temperature stress TRANSCRIPTOME differential expressed genes
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不同树龄橡胶(Hevea brasiliensis)林细根生物量的垂直分布和年内动态 被引量:22
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作者 林希昊 王真辉 +1 位作者 陈秋波 杨礼富 《生态学报》 CAS CSCD 北大核心 2008年第9期4128-4135,共8页
用根钻法对幼树期(5a)、初产期(9a)和旺产期(16a)3个树龄橡胶树细根(〈2 mm)生物量变化、垂直分布及动态变化进行研究。结果表明:5、9、16a橡胶林0~60cm土层内细根总生物量分别为2056.18、1557.42、1174.90 kg·hm^-2。... 用根钻法对幼树期(5a)、初产期(9a)和旺产期(16a)3个树龄橡胶树细根(〈2 mm)生物量变化、垂直分布及动态变化进行研究。结果表明:5、9、16a橡胶林0~60cm土层内细根总生物量分别为2056.18、1557.42、1174.90 kg·hm^-2。细根的生物量与橡胶树不同生长或生产期有密切的关系,但幼龄橡胶树细根生物量还容易受环境的影响而改变。橡胶树细根总生物量80%左右分布在0~40cm土层,细根生物量随着土层深度的增加而减少,回归模型分析以指数方程y=a.ebx(a、b均为常数)拟合效果较好。通过不同月份细根生物量比较,发现橡胶树细根生物量年动态变化呈“双峰型”,5a、9a橡胶树峰值分别出现在4月份和8月份;16a橡胶树则出现在6月份和10月份,对环境因子的响应具有一定的滞后性。不同树龄橡胶树表层细根生物量年内变化不一致,其它土层细根生物量年内变化也呈“双峰型”,土层越深,变化越趋于缓慢。 展开更多
关键词 橡胶树 细根生物量 垂直分布 年内动态
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巴西橡胶树(Hevea brasiliensis)微管相关蛋白全长cDNA克隆及表达分析 被引量:5
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作者 邓柳红 肖苏生 +1 位作者 罗明武 张春发 《热带亚热带植物学报》 CAS CSCD 北大核心 2005年第6期480-484,共5页
从巴西橡胶树Heveabrasiliensis差减cDNA文库中分离到微管相关蛋白(Microtubule-associatedprotein,MAPs)基因片段,根据该基因片段序列信息,设计特异引物,采用cDNA末端快速扩增技术RACE(RapidAmplificationofcDNAEnds)进行差异片段的5’... 从巴西橡胶树Heveabrasiliensis差减cDNA文库中分离到微管相关蛋白(Microtubule-associatedprotein,MAPs)基因片段,根据该基因片段序列信息,设计特异引物,采用cDNA末端快速扩增技术RACE(RapidAmplificationofcDNAEnds)进行差异片段的5’和3’端的扩增,获得了长度为788bp的全长cDNA,该基因在GenBank中的登录号为AY461412。序列分析表明该基因包含完整的开放阅读框,编码144个氨基酸,与微管相关蛋白基因家族具有很高的同源性,推测该基因是微管相关蛋白基因。半定量RT-PCR检测证实它在胶乳中的表达强于叶中,胁迫处理(伤害及乙烯处理)使其表达上调。 展开更多
关键词 巴西橡胶树 微管相关蛋白 CDNA末端快速扩增技术 RT-PCR
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橡胶树(Hevea brasiliensis Muell.Arg.)幼茎木材的超微结构观察 被引量:1
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作者 王祥军 曾仙珍 +3 位作者 王亚杰 黄肖 张源源 李维国 《植物研究》 CAS CSCD 北大核心 2018年第6期876-885,共10页
橡胶树是中国重要的热带经济作物,橡胶种植的副产物橡胶木是我国木材供应的重要来源。我们以不同发育阶段的橡胶树幼茎木材为材料,借助扫描电子显微镜技术,对木质部细胞的超微结构进行了观察。结果表明,在橡胶树幼茎木材中,导管和木纤... 橡胶树是中国重要的热带经济作物,橡胶种植的副产物橡胶木是我国木材供应的重要来源。我们以不同发育阶段的橡胶树幼茎木材为材料,借助扫描电子显微镜技术,对木质部细胞的超微结构进行了观察。结果表明,在橡胶树幼茎木材中,导管和木纤维细胞壁随着木质部发育成熟会发生明显的次生加厚,加厚方式主要为螺纹加厚;木质部各类型细胞均存在大量纹孔,纹孔排列方式主要有散生、网状、梯状和单串状等类型;在木质部发育过程中,木射线和部分薄壁细胞中会逐渐积累大量淀粉粒;木质部细胞内壁及其填充物表面存在不同类型的附着物。研究结果将为橡胶木材材性及其形成机制的研究提供一定理论参考。 展开更多
关键词 橡胶树 木材 超微结构 扫描电子显微镜
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Evaluation of unconstrained and constrained mathematical functions to model girth growth of rubber trees (Hevea brasiliensis) using young agemeasurements 被引量:6
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作者 T.R.Chandrasekhar 《Journal of Forestry Research》 CAS CSCD 2012年第3期365-375,共11页
No attempt has been made to date to model growth in girth of rubber tree (Hevea brasiliansis). We evaluated the few widely used growth functions to identify the most parsimonious and biologically reasonable model fo... No attempt has been made to date to model growth in girth of rubber tree (Hevea brasiliansis). We evaluated the few widely used growth functions to identify the most parsimonious and biologically reasonable model for describing the girth growth of young rubber trees based on an incomplete set of young age measurements. Monthly data for girth of immature trees (age 2 to 12 yearsi from two locations were sub- jected to modelling. Re-parameterized, unconstrained and constrained growth functions,of Richards (RM), Gompertz (GM) and the monomo- lecular 'model ^(MM) were fitted to data. Duration of growth was the firsf constraint introduced. In the stagel We attempted a population aver- age (PA) model to capture the trend in growth. The best PA model was fitted as a subject specific (SS) model. We used appropriate error vari- ance-covariance structure to account for correlation due to repeated measurements over time. Unconstrainecl functions underestimated the asymptotic maximum that did not reflective carrying capacity of the locations. Underestimafions were attributed to the partial set' of meas- urements made during the early growth phase of the trees. MM proved superior to RM and GM. In the randomcoefficient models, both Gf and Go appeared to be influenced by tree level effects. Inclusion of diagonal definite positive matrix removed the correlation between random effects. The results were similar at both locations. In the overall assessment MM appeared as the candidate model for studying the girth-age relationships in Hevea trees. Based on the fitted model we conclude that, in Hevea trees, growth rate is maintained at maximum value at to, then decreases until the final state at dG/dt 〉 0, resulting in yield curve with no period of accelerating growth. One physiological explanation is that photosynthetic activity in Hevea trees decreases as girth increases and constructive metabolism is larger than destructive metabolism. 展开更多
关键词 natural rubber Hevea brasiliensis growth modelling un-constrained functions constrained functions mixed model
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Preliminary Study on Seedling Growth Rhythm and Grey Correlation Analysis of Rubber (Hevea brasiliensis) Seedlings in Danzhou District, Hainan 被引量:5
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作者 Dongling Qi Chuan Yang +2 位作者 Guishui Xie Zhixiang Wu Zhixiang Wu 《American Journal of Plant Sciences》 2014年第26期3866-3872,共7页
The rubber tree physiological and ecological process quantitatively described by using mathematical method is an important means to the analysis of rubber tree growth process and mechanism. The study on growth simulat... The rubber tree physiological and ecological process quantitatively described by using mathematical method is an important means to the analysis of rubber tree growth process and mechanism. The study on growth simulation model of rubber tree will lay the foundation for the application of rubber tree cultivation intelligent decision system. A Richards equation was formulated to describe the height and stem diameter growth dynamics of the annual rubber seedlings. An area correlation analysis was done according to the closeness of the observed parameters to the dynamic curve on the gray system composed of the seedling growth increment and the meteorological factors including aerial temperature, precipitation and solar radiation hours that influence upon the seedling growth. The results showed that rubber seedling response fitted the Richards equation quite well. The growth increment displayed a distinct alternation of 'slow—fast—slow— fast—slow' rhythm. The growth course of the seedlings might be partitioned into three periods of time by the sequential clustering analysis, namely pre-growing, fast-growing, late-growing stage. The tray correlation analysis revealed that air temperature had the most significant influence while precipitation had the least impact on height growth of the rubber seedlings. In conclusion, the air temperature had the most significant influence while solar radiation hours had the least impact on stem diameter growth of the rubber seedlings. 展开更多
关键词 RUBBER (Hevea brasiliensis) RICHARDS Equation Growth RHYTHM Gray Correlation
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Effect of natural and synthetic antioxidants on oxidative stability of FAMEs obtained from hevea brasiliensis 被引量:1
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作者 S.Nivetha D.Vetha Roy 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第6期935-941,共7页
Biodiesel(fatty acid alkyl esters),an alternate to fossil fuel,has the tendency of autoxidation and hence requires antioxidants for long term storage.The influence of synthetic and natural antioxidants on the oxidativ... Biodiesel(fatty acid alkyl esters),an alternate to fossil fuel,has the tendency of autoxidation and hence requires antioxidants for long term storage.The influence of synthetic and natural antioxidants on the oxidative stability was analysed for fresh FAMEs(fatty acid methyl esters)obtained from hevea brasiliensis at 140 C.Higher activity was observed for synthetic antioxidants following the order of GA】BHT】DTBP】Q】GT-M】PH-M】GT-C,whereas the oxidative stability of stored FAMEs samples measured at 110 C reveals a nearly inverse trend.Storage stability was tested for the FAMEs obtained from hevea brasiliensis stored at 30 C,after addition of synthetic and natural antioxidants—butylated hydroxytoluene(BHT),2,6-di-tert-butylphenol(DTBP),quercetin(Q),gallic acid(GA),methanol extracts from green tea(GTM),pomegranate hull(PH-M),and chloroform extract of green tea(GT-C).Antioxidant activities above 1500 ppm was in the order of DTBP】BHT】GA】GT-C】GT-M】Q】PH-M.Synthetic antioxidants have been found more efficient to improve the storage stability of FAMEs obtained from hevea brasiliensis.DTBP in particular has the highest protection factor. 展开更多
关键词 hevea brasiliensis fatty acid methyl esters oxidative stability storage stability ANTIOXIDANTS
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Proximate Composition and Fatty Acid Profile of Raw and Roasted Salt-Dried Sardines (<i>Sardinella Brasiliensis</i>) 被引量:1
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作者 Milena Keller Bulla Julliana Isabelle Simionato +4 位作者 Makoto Matsushita Fabio Augusto Garcia Coró Massami Shimokomaki Jesuí Vergilio Visentainer Nilson Evelazio de Souza 《Food and Nutrition Sciences》 2011年第5期440-443,共4页
The proximate composition and fatty acid profile of five lots of samples of raw and roasted salt-dried sardines (Sardi-nella brasiliensis) bought locally in Maringá, Paraná State, Brazil were determined. Sig... The proximate composition and fatty acid profile of five lots of samples of raw and roasted salt-dried sardines (Sardi-nella brasiliensis) bought locally in Maringá, Paraná State, Brazil were determined. Significant differences (P < 0.05) were observed between samples of raw and roasted sardines, both in relation to moisture, total lipids, proteins, and ashes. The major fatty acids in raw and roasted sardine samples were docosahexaenoic acid (DHA, 22: 6n-3, 35.98%, 12.46%);palmitic acid (16: 0, 37.59%;24.18%), and eicosapentaenoic acid (EPA, 20: 5n-3, 6.62%;2.95%), respec-tively. The ratios of polyunsaturated to saturated fatty acid (PUFA/SFA) were 1.32 and 0.33, and the n-6/n-3 ratios were 0.07 and 0.13 in raw and roasted sardines, respectively. The results showed that roasting increased the SFA and reduced the PUFA in sardines, which still were rich in PUFA and remained a low-cost and nutritionally healthy food. 展开更多
关键词 SARDINE Sardinella brasiliensis RAW SARDINE Roasted SARDINE Fatty Acids
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Molecular Cloning and Analysis of LEA14L2 Gene from Rubber Tree( Hevea brasiliensis Muell. Arg. ) 被引量:1
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作者 Zhi ZOU Lifu YANG +2 位作者 Feng AN Zhenhui WANG Kun YUAN 《Agricultural Biotechnology》 CAS 2013年第5期4-8,共5页
Using an isotig encoding a putative polypeptide with high similarity to Arabidopsis LEA14 as a query, a 613 bp long cDNA was in silico cloned from the transeriptome data of rubber tree. The sequence nominated as HbLEA... Using an isotig encoding a putative polypeptide with high similarity to Arabidopsis LEA14 as a query, a 613 bp long cDNA was in silico cloned from the transeriptome data of rubber tree. The sequence nominated as HbLEA14L2 contains an ORF of 456 bp with 3 bp 5' UTR and 154 bp 3' UTR. Subsequently, a 464 bp eDNA and an 834 bp genome sequence containing this ORF was amplified and sequenced. Sequence analysis suggested that HbLEA14L2 has one intron and encodes 151 amino acids with a theoretical molecular weight of 16.55 kDa, isoleetric point of 4.93 and GRAVY value of -0.022, indicating a cytoplasmle localization pattern; HbLEA14L2 protein contains a conserved LEA_2 domain and belongs to LEA_2 subfamily, sharing 91%, 76%, 75%, 72% and 63% similarity with the homologous proteins in castor bean, leafy spurge, poplar, cotton, and Arabidopsis, respectively. Swiss-Model indicated that the tertiary structure of HbLEA14L2 is consisted of one α-helix and seven β-sheets, which was proposed to serve as a regulatory protein to prevent cellular desiccation. 展开更多
关键词 Hevea brasiliensis Muell. Arg. Arabidopsis thaliana LEA14 Shoot apex
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Corneal ulcer caused by nocardia brasiliensis in a patient with diabetes 被引量:1
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作者 Xian-Ning Liu Na An +3 位作者 Jie Wu Kun Xu Xiu-Ping Zh Sheng-Li Mi 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2014年第2期381-383,共3页
Dear Sir,Iam Dr.Sheng-Li Mi,from the Biomanufacturing engineering laboratory,Graduate School at Shenzhen,Tsinghua University,Shenzhen,China.I write to present a case report of nocardia brasiliensis in a patient with d... Dear Sir,Iam Dr.Sheng-Li Mi,from the Biomanufacturing engineering laboratory,Graduate School at Shenzhen,Tsinghua University,Shenzhen,China.I write to present a case report of nocardia brasiliensis in a patient with diabetes.Nocardia is part of a group of aerobic actinomycetes,widely distributed in soil.Nocardia asteroids and nocardia brasiliensis are the most common human pathogens.Humans infected by nocardia asteroids through the respiratory tract mainly suffer from primary suppurative pulmonary conditions.Infection of nocardia brasiliensis often occurs in the advanced stages of a progressive disease or immune disorder,especially Cushing syndrome,diabetes,or in patients using corticosteroids,immunosuppressive agents and broad-spectrum antibiotics for long time[1].To our knowledge,the reports of nocardia keratitis was very rare 展开更多
关键词 Corneal ulcer caused by nocardia brasiliensis in a patient with diabetes
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Intra-and inter-clonal tree growth variations of Hevea brasiliensis
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作者 H.R.Naji M.H.Sahri 《Journal of Forestry Research》 CAS CSCD 2012年第3期429-434,共6页
We evaluated the effects of planting densities (500, 1,000, 1,500 and 2,000 trees.ha-1) on tree growth performance (diameter at base, diameter at breast height, and clear bole height) of two clones (RRIM 2020 and... We evaluated the effects of planting densities (500, 1,000, 1,500 and 2,000 trees.ha-1) on tree growth performance (diameter at base, diameter at breast height, and clear bole height) of two clones (RRIM 2020 and PRIM 2025) of nine years old plantations of rubber tree (Hevea brasiliensis Muell. Arg) in Malaysia. For the four planting densities of the two clones, basal area and diameter at breast height declined with increasing planting density. Clear bole heights were greatest at 1,500 trees.haland lowest at 500 trees.ha-1 for the clone RRIM 2020, and at 2,000 trees.ha-1and 500 trees.halfor clone RRIM 2025. We conclude that the ideal planting density is 2,000 trees.ha"l for obtaining high volume of wood production and 500 trees-ha-1 for high wood quality. 展开更多
关键词 CLONE planting density tree growth Hevea brasiliensis
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Morphological Studies on the Infraciliature of a Planktonic Ciliate,Tintinnopsis brasiliensis(Ciliophora:Tintinina) 被引量:1
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作者 CAI Shengfang SONG Weibo +1 位作者 XU Dapeng CHIANG Kuoping 《Journal of Ocean University of China》 SCIE CAS 2006年第1期55-57,共3页
糟糕描述的海洋的板补品有睫, Tintinnopsis brasiliensisKofoid &amp; 坎贝尔, 1929,从 Qingdao 的太平天国的披肩镇定,中国,词法上在 protargol 受精以后基于永久准备被调查并且与另外的相关同种的物相比。根据 infraciliat... 糟糕描述的海洋的板补品有睫, Tintinnopsis brasiliensisKofoid &amp; 坎贝尔, 1929,从 Qingdao 的太平天国的披肩镇定,中国,词法上在 protargol 受精以后基于永久准备被调查并且与另外的相关同种的物相比。根据 infraciliature,三个睫的组能被认出,它在标本之中揭示很稳定的结构并且表示 infraciliature 的模式是除了古罗马胸甲的特征,为种类鉴定的一个高度可靠的标准。 展开更多
关键词 表膜下纤毛系 形态特征 海岸 深海 有机体 纤毛孢子
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Habitat Preference and Effects of Coastal Fragmentation in the Sand-Dwelling Spider <i>Allocosa brasiliensis</i>(Lycosidae, Allocosinae)
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作者 Carolina Jorge álvaro Laborda +2 位作者 Marcelo Alves Días Anita Aisenberg Miguel Simó 《Open Journal of Animal Sciences》 2015年第3期309-324,共16页
Allocosa brasiliensis is a sand-dwelling wolf spider considered a good bioindicator to evaluate the quality of coastal dune ecosystems from Uruguay. Habitat fragmentation and human activities have impacted and reduced... Allocosa brasiliensis is a sand-dwelling wolf spider considered a good bioindicator to evaluate the quality of coastal dune ecosystems from Uruguay. Habitat fragmentation and human activities have impacted and reduced the Southern Uruguayan coast during the last decades. The aim of the present study was to evaluate the density, surface activity and habitat preference of A. brasiliensis in beaches with different human impact. For that purpose, we sampled during the night with head lamps and applied the capture-mark-recapture method. Females were more abundant than males and were the most recaptured sex. The most fragmented beaches showed lower number of burrows and individuals, especially in immatures stages. We found that the most suitable sandy habitat for A. brasiliensis should present a vegetation cover optimum of 25% - 50% of the surface. This study could provide tools for the implementation of future management conservation plans of the Southern Uruguayan coastline. 展开更多
关键词 Allocosa brasiliensis Wolf Spiders SANDY Coast BIOINDICATOR Ecology
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Immunophenotyping of peripheral blood mononuclear cells and intracellular detection of IL-2, IFNγ and IL-4 by flow cytometry in patients with actinomycetoma by Nocardia brasiliensis and Actinomadura madurae. Findings in six patients
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作者 Heuze de Icaza Yvonne Castrillón Rivera Laura Estela +4 位作者 Garibay-Escobar Adriana Santos-Argumedo Leopoldo Sandoval Trujillo Horacio Padilla Desgarennes Carmen Palma Ramos Alejandro 《Health》 2011年第3期172-178,共7页
Mycetoma is a chronic, granulomatous, progressive inflammatory disease;it usually involves the subcutaneous tissue after a traumatic inoculation of the causative organism. Mycetoma may be caused by true fungi or bacte... Mycetoma is a chronic, granulomatous, progressive inflammatory disease;it usually involves the subcutaneous tissue after a traumatic inoculation of the causative organism. Mycetoma may be caused by true fungi or bacteria (actinomycetes) and hence it is classified as eumycetoma and actinomycetoma respectively. Mycetoma immunological studies have fre- quently addressed humoral aspects. Few reports have addressed the role of cellular immunity in humans, for this reason, we were interested in finding differences in the circulating population of mononuclear cells or in the ability of this pathology to produce cytokines after mitogen stimulation. In this study, immunophenotyping of peripheral blood mononuclear cells (PBMN) and intracellular detection by flow cytometry of IL-2, IFNγ and IL-4 in patients with actino- mycetoma by Nocardia brasiliensis and Actino- madura madurae were evaluated. We investi- gated the expression of T-cells (CD3, CD4 and CD8), B-cells (CD19), monocytes (CD14), and natural killer cells (CD16 and CD56) markers. CD69 and CD25 were used to monitor individual activated cell subsets. The percentage values of the cells were calculated. Our results indicated that PBMC from patients with mycetoma show similar percentages of circulating cells when compared with healthy donors. The expression of IL-2 receptor (IL-2R) by mitogen activation was similar in these two groups. These findings suggest that circulating lymphocytes are not affected by this pathology. Intracellular IL-4 was increased only in patients with mycetoma by N. brasiliensis, suggesting a TH2 profile;this ob- servation has been reported by other authors. 展开更多
关键词 ACTINOMYCETOMA NOCARDIA brasiliensis Actinomadura madurae Cytokines CD4+ CD8+ CD56+
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Studies on Rubber (<i>Hevea brasiliensis</i>) Trees Exist Plant Type after Planting and Available Tapping Tree of Rubber Plantation in China
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作者 Dongling Qi Jiannan Zhou +1 位作者 Guishui Xie Zhixiang Wu 《American Journal of Plant Sciences》 2014年第20期3017-3021,共5页
Existing plant types of rubber tree after planting and available tapping tree were investigated, and there were about 28 rubber plantations with different tapping years of 8 varieties “CATAS7-33-97”, “CATAS8-79”, ... Existing plant types of rubber tree after planting and available tapping tree were investigated, and there were about 28 rubber plantations with different tapping years of 8 varieties “CATAS7-33-97”, “CATAS8-79”, “CATAS7-20-59”, “PR107”, “RRIM600”, “GT1”, “INA873”, “93-114”in South China. The results showed that there were six kinds of existing plant types of rubber tree after planting of rubber plantations, which were available tapping trees, wind damaged trees, cold damaged trees, tapping panel dryness trees, absent trees and weak trees, respectively. These data investigated also showed rubber trees under available tapping, stoppage due to tapping panel dryness, absence, wind damage, cold damage and weakness were counted and calculated and made up for 72.21%, 14.75%, 5.61%, 3.86%, 2.68% and 1.89%. Tapping panel dryness trees, wind damage and absent trees are major factors for the loss of tapping rubber trees in the rubber plantations. Of these investigated varieties, available tapping trees per 100 trees of rubber plantation of “PR107”at the 1st, 12th, 14th, 16th, 20th, 24th tapping year were 96, 67, 70, 75, 66, 46 trees in Hainan planting zone, respectively. Available tapping trees per 100 trees of rubber plantation of “RRIM600”at the 9th, 15th, 20th, 22nd tapping year were 88, 62, 55, 36 trees in Yunnan planting zone, respectively. Available tapping trees per 100 trees of rubber plantation of “93-114” at the 10th, 19th, tapping year were 94, 62 trees in Guangdong planting zone. These results showed that available tapping trees of rubber plantation decreased with increasing tapping age under different planting zones in China. 展开更多
关键词 RUBBER TREE (Hevea brasiliensis) Exist Plant Type Available TAPPING TREE RUBBER Plantations Different TAPPING Years China
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An Analysis of the Patents concerning Hevea brasiliensis
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作者 Xijuan LI Qing CHEN +3 位作者 Bingjiang XU Xinxin REN Huasun HUANG Qiong LI 《Asian Agricultural Research》 2015年第9期58-61 64,64,共5页
This paper mainly analyzes the application data of patents concerning Hevea brasiliensis in the world and China from the perspectives of time,research field,and the geographical distribution of applicants. It also int... This paper mainly analyzes the application data of patents concerning Hevea brasiliensis in the world and China from the perspectives of time,research field,and the geographical distribution of applicants. It also interprets the patents for invention in China from time,research field,and types of applicants. Based on the study,it shows that although the patent applications fluctuate,the general trend is rising. And the patents are mostly concentrated in plant protection,and agricultural biotechnology. The Chinese applicants of patents for invention largely work in the research institutes,and most of these patents focus on the field of plant protection,agricultural biotechnology,and agro-processing.However,the foreign applicants mainly work in companies,and most of these patents only focus on plant protection. These findings will provide a reference for formulating development policies about natural rubber industry in China. 展开更多
关键词 NATURAL RUBBER HEVEA brasiliensis PATENT ANALYSIS
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Molecular Cloning and Sequence Analysis of an Aquaporin Gene Related to Tapping Panel Dryness in Rubber Tree( Hevea brasiliensis Muell. Arg. )
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作者 Zhi ZOU Yeyong MO +2 位作者 Dahua WANG Feng AN Lifu YANG 《Agricultural Biotechnology》 CAS 2014年第2期37-39,43,共4页
As a syndrome with tapping incision blocked partly or entirely during latex exploiting in rubber tree (Hevea brasiliensis ), "Tapping panel dryness (TPD)" causes great yield losses, thereby becoming the most imp... As a syndrome with tapping incision blocked partly or entirely during latex exploiting in rubber tree (Hevea brasiliensis ), "Tapping panel dryness (TPD)" causes great yield losses, thereby becoming the most important factor limiting rubber production. On the basis of an EST down-regulated in TPD-affected rubber trees, a 903 bp cDNA denoted HbPIP2;2 was isolated from the bark tissue with a combination of in silico cloning and RT-PCR. The cDNA contains an 867 hp ORF, 13 bp 5'UTR and 23 bp 3' UTR. Sequence analysis indicated that HbPIP2;2 encodes 288 amino acids with a theoretical molecular weight (Mw) of 30. 71 kDa and isolectric point (Pi) of 8.20. Bioinformatics analysis suggested that the deduced protein is predicted to have six transmembrane helices located to the plasma membrane and harbor one conserved MIP domain that can be grouped into plasma membrane intrinsic proteins (PIPs) of aquaporin (AQP) family. Homolo- gy search revealed that the protein shares a similarity of more than 90% with the homologues in Ricinus communis, Popttlus trichocarpa, Juglans regia and Theobro- ma cacao, suooorting a hie.hly conserved evolution. This study provided basis for further uncovering the regulatory role of AOPs in TPD occurrence. 展开更多
关键词 Hevea brasiliensis Tapping panel dryness AQUAPORIN Plasma membrane intrinsic protein
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Advances in Tissue Culture of Rubber( Hevea brasiliensis L. )
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作者 Mingwu LUO Liuhong DENG 《Agricultural Biotechnology》 CAS 2014年第6期34-37,共4页
Natural rubber, which is produced as a secondary plant metabolite, has been well recognized as an important raw industrial material due to its unique properties that can not be substituted by any alternative synthetic... Natural rubber, which is produced as a secondary plant metabolite, has been well recognized as an important raw industrial material due to its unique properties that can not be substituted by any alternative synthetic materials. Although more than 2000 plant species have been shown to possess the ability to synthe- size natural rubber, Hevea brasiliensis L. is yet the only one qualified as a commercial source for natural rubber production, which not only has important economic value, but "also leads to significant ecological and social benefits to maintain ecological forest microclimate and ease current ecological issues caused by dwindling natural forests. With the growing demand for natural rubber, providing a large number of high-quality rubber planting materials has become a major issue to be solved. In this paper, advances on tissue culture of H. brasiliensis were summarized, which laid the foundation for breeding high-quality rubber planting materials. 展开更多
关键词 Hevea brasiliensis L. Tissue culture ADVANCES
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Molecular Cloning and Sequence Analysis of a Tonoplast Aquaporin Gene TIP1 Associated with Tapping Panel Dryness in Hevea brasiliensis
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作者 Zhi ZOU Danhua WANG +2 位作者 Yeyong MO Feng AN Lifu YANG 《Agricultural Biotechnology》 CAS 2014年第3期14-17,共4页
[Objective]To address the role of aquaporins(AQPs)in the occurrence of Tapping Panel Dryness(TPD),a phenomenon with tapping incision blocked partly or entirely during latex exploiting in the rubber tree(Hevea bra... [Objective]To address the role of aquaporins(AQPs)in the occurrence of Tapping Panel Dryness(TPD),a phenomenon with tapping incision blocked partly or entirely during latex exploiting in the rubber tree(Hevea brasiliensis)that causes great losses on rubber production,a tonoplast aquaporin gene associated with TPD occurence was cloned and analyzed.[Method]Based on an EST down-regulated in TPD-affected rubber trees,a 774 bp cDNA designated HbTIP1 was isolated from the bark tissue of Hevea brasiliensis with a combination of in silico cloning and RT-PCR.And the gene structure and sequence characteristics were analyzed using bioinformatics tools.[Result]The cDNA includes a 759 bp ORF,8 bp 5’UTR and 7 bp 3’UTR.Sequence analysis indicated that HbTIP1putatively encodes 252 amino acids with a theoretical molecular weight(Mw)of 25.88 kDa and isolectric point(pI)of 4.96.Bioinformatics analysis suggested that the deduced protein is predicted to have six transmembrane helices located to the vacuolar membrane and to harbor one conserved MIP domain that can be grouped into the tonoplast intrinsic proteins(TIPs)of aquaporin family.Homology search revealed that the protein shares a similarity of more than 90%with the homologues in Theobroma cacao,Prunus persica,Citrus sinensis and Ricinus communis,supporting a highly conserved evolution.[Conclusion]This study provided basis for further revealing the regulatory role of AQPs in the TPD occurrence. 展开更多
关键词 Hevea brasiliensis Tapping panel dryness AQUAPORIN
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Seasonal Changes Impact on Growth of Rubber (<i>Hevea brasiliensis</i>) Seedlings under Different Cultivation
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作者 Dongling Qi Guishui Xie Zhixiang Wu 《Open Journal of Forestry》 2019年第4期397-406,共10页
The vegetative growth of rubber tree is an important basis for rubber tree cultivation and economic management. Stem diameter and height growth patterns of rubber seedlings and the seasonal variability are still poorl... The vegetative growth of rubber tree is an important basis for rubber tree cultivation and economic management. Stem diameter and height growth patterns of rubber seedlings and the seasonal variability are still poorly understood. Studying the annual growth patterns and seasonal variation of rubber seedling will help understanding biological characteristics of rubber tree and provide a reference for field cultivation and management. Height growth and stem diameter of field-sown rubber seedlings cultivation and polybag-raised cultivation all displayed a distinct annual pattern of “slow-fast-slow”. Height growth and stem diameter growth response fitted the logistic equation preferably, supporting the observed pattern. Fast-growth of plant height for polybag-raised rubber seedlings cultivation and field-sown rubber seedlings cultivation occurred from June to November and May to November, respectively. This period saw the greatest accumulations of plant height growth for polybag-raised rubber seedlings cultivation and field-sown rubber seedlings cultivation accounting for 83.99% and 86.65% of total growth, respectively. Fast-growth of stem diameter for polybag-raised rubber seedlings cultivation and field-sown rubber seedlings cultivation occurred from June to November and May to November, respectively. This period saw the greatest accumulations of stem growth for polybag-raised rubber seedlings cultivation and field-sown rubber seedlings cultivation accounting for 86.71% and 84.60% of total growth, respectively. Polybag-raised rubber seedlings cultivation and field-sown rubber seedlings cultivation for the whole year had nine extension units and each month had one extension unit from May to November. Extension unit of for the whole year did not stop period and plant height growth rate has the seasonal difference. However, leaf phenophase of field-sown rubber seedlings cultivation was earlier than that of polybag-raised rubber seedlings cultivation and each extension unit of field-sown rubber seedlings cultivation was greater than that of poly-bag-raised rubber seedlings cultivation. The precipitation had the greatest impact on seedlings growth under different cultivation. There was no period annually in which height growth and stem diameter growth did not occur and the fastest growth occurred during the rainy season. Plant height and stem diameter of rubber seedlings under different cultivation showed isogony phenomenon. Extension unit and leaf phenophase of polybag-raised rubber seedlings and field-sown rubber seedlings showed consistency and synchronization characteristic. Different cultivation of rubber seedling should take corresponding measures tending management and operation. 展开更多
关键词 RUBBER (Hevea brasiliensis) Logistic Equation GROWTH Patterns Seasonal Change
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