文献类型: 外文期刊
作者: Chao, Jinquan 1 ; Yang, Shuguang 1 ; Chen, Yueyi 1 ; Tian, Wei-Min 1 ;
作者机构: 1.Chinese Acad Trop Agr Sci, Minist Agr, Key Lab Biol & Genet Resources Rubber Tree, Danzhou, Peoples R China; Chinese Acad Trop Agr Sci, State Key Lab Breeding Base Cultivat & Physiol Tr, Rubber Res Inst, Danzhou, Peoples R China
关键词: Hevea brasiliensis Muell. Arg;duration of latex flow;latex metabolism;gene expression;qRT-PCR
期刊名称:FRONTIERS IN PLANT SCIENCE ( 影响因子:5.753; 五年影响因子:6.612 )
ISSN: 1664-462X
年卷期: 2017 年 8 卷
页码:
收录情况: SCI
摘要: Latex exploitation enhances latex regeneration in rubber trees. The latex exploitation-caused latex flow lasts from 10 min to a few hours, which is convenient for exploring the transcript profiling of latex metabolism-related genes at the different stages of latex flow. In the present study, the expression pattern of 62 latex metabolism-related genes involved in water transportation, carbohydrate metabolism, natural rubber biosynthesis, hormone signaling, ROS generation and scavenging, and latex coagulum across three stages of latex flow between rubber tree clones CATAS7-33-97 and CATAS8-79 were comparatively analyzed by quantitative real-time PCR. The two clones show differences in latex regeneration and have a different duration of latex flow. The results showed that the expression levels of 38 genes were significantly higher in CATAS8-79 latex than in CATAS7-33-97 during latex regeneration, while 45 genes had a notably higher expression level in CATAS8-79 latex during latex flow. Together with the activation of the MEP pathway and jasmonate pathway in CATAS8-79 latex, HbPIP1; 3, HbPIP1; 4, HbSUT3, HbSus3, HbHMGS1-2, HbMK should contribute to the high latex regeneration ability. The up-regulation of ethylene signaling and Hb44KD and the down-regulation of latex coagulation-related genes in CATAS8-79 latex might contribute to its longer latex flow duration. This study provides some cues for revealing the regulation of latex metabolism in rubber trees.
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