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Ethrel-stimulated prolongation of latex flow in the rubber tree (Hevea brasiliensis Muell. Arg.): an Hev b 7-like protein acts as a universal antagonist of rubber particle aggregating factors from lutoids and C-serum

文献类型： 外文期刊

作者： Shi, Min-Jing 1 ; Cai, Fu-Ge 2 ; Tian, Wei-Min 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Inst Rubber Res, Danzhou 571737, Hainan, Peoples R China

2.Minist Agr, Key Lab Biol & Genet Resources Rubber Tree, Danzhou 571737, Hainan, Peoples R China

关键词： duration of latex flow;ethrel;Hev b 7;Hevea brasiliensis Muell. Arg.;rubber particle aggregation

期刊名称：JOURNAL OF BIOCHEMISTRY （ 影响因子：3.387； 五年影响因子：3.169 ）

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收录情况： SCI

摘要： Ethrel is the most effective stimuli in prolonging the latex flow that consequently increases yield per tapping. This effect is largely ascribed to the enhanced lutoid stability, which is associated with the decreased release of initiators of rubber particle (RP) aggregation from lutoid bursting. However, the increase in both the bursting index of lutoids and the duration of latex flow after applying ethrel or ethylene gas in high concentrations suggests that a new mechanism needs to be introduced. In this study, a latex allergen Hev b 7-like protein in C-serum was identified by matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI TOF MS). In vitro analysis showed that the protein acted as a universal antagonist of RP aggregating factors from lutoids and C-serum. Ethrel treatment obviously weakened the effect of C-serum on RP aggregation, which was closely associated with the increase in the level of the Hev b 7-like protein and the decrease in the level of the 37 kDa protein, as revealed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), western blotting analysis and antibody neutralization. Thus, the increase of the Hev b 7-like protein level or the ratio of the Hev b 7-like protein to the 37 kDa protein in C-serum should be primarily ascribed to the ethrel-stimulated prolongation of latex flow duration.

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[1]Cloning, heterologous expression and characterization of ascorbate peroxidase (APX) gene in laticifer cells of rubber tree (Hevea brasiliensis Muell. Arg.). Chao, Jinquan,Zhang, Shixin,Chen, Yueyi,Tian, Wei-Min.

[2]Comparative Proteomics of Primary and Secondary Lutoids Reveals that Chitinase and Glucanase Play a Crucial Combined Role in Rubber Particle Aggregation in Hevea brasiliensis. Wang, Xuchu,Shi, Minjing,Chen, Yueyi,Cai, Fuge,Zhang, Shixin,Tian, Wei-Min,Wang, Xuchu,Wang, Dan,Wang, Limin,Tong, Zheng. 2013

[3]Comparative proteomic analysis of latex from Hevea brasiliensis treated with Ethrel and methyl jasmonate using iTRAQ-coupled two-dimensional LC-MS/MS. Zeng, Rizhong.

[4]Transcript Profiling of Hevea brasiliensis during Latex Flow. Tian, Wei-Min. 2017

[5]Comparative transcriptome analysis of latex from rubber tree clone CATAS8-79 and PR107 reveals new cues for the regulation of latex regeneration and duration of latex flow. Chao, Jinquan,Chen, Yueyi,Wu, Shaohua,Tian, Wei-Min. 2015

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[7]cDNA Cloning and Expression Analysis of Three Components of SCFCOI1 Complex in Hevea brasiliensis. Ma, Ru-Feng,Wang, Li-Feng,Tian, Wei-Min,Peng, Shi-Qing. 2012

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[9]Plant regeneration via somatic embryogenesis from root explants of Hevea brasiliensis. Zhou, Quan-Nan,Huang, Tian-Dai,Li, Wei-Guo,Sun, Ai-Hua,Dai, Xue-Mei,Li, Zhe,Jiang, Ze-Hai. 2010

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[12]Mechanical wounding-induced laticifer differentiation in rubber tree: An indicative role of dehydration, hydrogen peroxide, and jasmonates. Tian, Wei-Min,Yang, Shu-Guang,Shi, Min-Jing,Zhang, Shi-Xin,Wu, Ji-Lin.

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