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 Dissecting the regulatory network of PAP/fibrillin genes involved in thylakoid membrane degradation during leaf senescence in Arabidopsis
Tác giả hoặc Nhóm tác giả: Truong Thi Tu Trinh, Lam Khac Ky, Ming-yi Huang, Irene Lin, Ruey-Hua Lee
Nơi đăng: 2014 Plant Science Annual meeting & Symposium - Innovation and Translational Technologies in Plant Science - Taiwan; Số: 57;Từ->đến trang: 73;Năm: 2014
Lĩnh vực: Khoa học; Loại: Báo cáo; Thể loại: Quốc tế
TÓM TẮT
ABSTRACT
Degradation of the thylakoid membrane is the first step for chloroplast breakdown during leaf senescence and is masked by increase number and size of plastoglobuli. Plastoglobuli consist of an outer galactolipid monolayer studded with PAPs/fibrillins on the surface of plastoglobuli. PAPs/flbrillins suggested playing roles in maintaining the structural stability of plastoglobuli, metabolite transport and against biotic and abiotic stresses. We are interested in dissecting the regulatory network of PAP/Fibrillin genes in response to developmental and environmental signals during leaf senescence. We have analyzed expression profiles of 14 PAP-fibrillin genes during different stages of leaf development and senescence. Most of these genes were induced to high levels in early leaf development and then reduced to low levels as leaf developed to maturity. These genes then again induced to high levels during onset of leaf senescence. We have also analyzed the expression profiles of these genes in response to different abiotic stresses and hormonal treatments. Promoter analysis of these genes, we have identified 42 putative transcription factors and 17 of these were induced during senescence. The putative regulatory networks of PAP-fibrillin gene family in response to developmental and environmental signals are presented.
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