title: Molecular identification and characterization of the pyruvate decarboxylase gene family associated with latex regeneration and stress response in rubber tree.
abstract: In plants, ethanolic fermentation occurs not only under anaerobic conditions but also under aerobic conditions, and involves carbohydrate and energy metabolism. Pyruvate decarboxylase (PDC) is the first and the key enzyme of ethanolic fermentation, which branches off the main glycolytic pathway at pyruvate. Here, four PDC genes were isolated and identified in a rubber tree, and the protein sequences they encode are very similar. The expression patterns of HbPDC4 correlated well with tapping-simulated rubber productivity in virgin rubber trees, indicating it plays an important role in regulating glycometabolism during latex regeneration. HbPDC1, HbPDC2 and HbPDC3 had striking expressional responses in leaves and bark to drought, low temperature and high temperature stresses, indicating that the HbPDC genes are involve in self-protection and defense in response to various abiotic and biotic stresses during rubber tree growth and development. To understand ethanolic fermentation in rubber trees, it will be necessary to perform an in-depth study of the regulatory pathways controlling the HbPDCs in the future.
authors.affiliation: Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, PR China.
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Long
authors.affiliation: Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, PR China; Colleges of Agrony, Hainan University, Haikou, Hainan, 570228, PR China.
authors.forename: Bin
authors.initials: B
authors.lastname: He
authors.affiliation: Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, PR China; Colleges of Agrony, Hainan University, Haikou, Hainan, 570228, PR China.
authors.forename: Chuang
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, PR China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, PR China.
authors.forename: Jiyan
authors.initials: J
authors.lastname: Qi
authors.affiliation: Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, 571737, PR China. Electronic address: chaorongtang@126.com.
authors.forename: Chaorong
authors.initials: C
authors.lastname: Tang
mesh_terms: D015971:Gene Expression Regulation, Enzymologic / Q000502:physiology*; D018506:Gene Expression Regulation, Plant / Q000502:physiology*; D028482:Hevea / Q000201:enzymology / Q000235:genetics; D007840:Latex / Q000378:metabolism*; D024301:Plant Bark / Q000201:enzymology / Q000235:genetics; D018515:Plant Leaves / Q000201:enzymology / Q000235:genetics; D010940:Plant Proteins / Q000096:biosynthesis / Q000235:genetics; D011767:Pyruvate Decarboxylase / Q000096:biosynthesis / Q000235:genetics
chemical_list: D007840:Latex; D010940:Plant Proteins; D011767:Pyruvate Decarboxylase
keywords: Abiotic stresses; Ethanolic fermentation; Hevea brasiliensis; Latex regeneration; Pyruvate decarboxylase