Tenuazonic Acid, a Novel Natural PSⅡ Inhibitor, Impacts on Photosynthetic Activity by Occupying the QB-Binding Site and Inhibiting Forward Electron Flow

摘要：

Tenuazonic acid (TeA), a member of representative natural tetramic acids, is a phytotoxin produced by the fungus Alternaria alternata isolated from diseased Croftonweed (Eupatorium adenophorum). TeA strongly inhibits photosynthesis, especially photosystem II (PSII) activity. Evidence from fast chlorophyll fluorescence induction transients of host plant shows that the most important action site of TeA is that it interrupts electron transport beyond QA, on the acceptor side of PSII, and this is due to its binding at the QB-site. On the basis of competition experiments with 14Catrazine, it is further confirmed that TeA does not share the same binding environment as atrazine, despite their common action target: the QB-site.

关键词： Tenuazonic acid Chl a fluorescence induction transients JIP-test PSⅡ inhibitor Reaction center

作者: Shiguo Chen Reto J Stresser Sheng Qiang Govindjee

作者单位: Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, China Weed Research Laboratory, Nanjing Agricultural University, Nanjing 210095, China Chair Professor of Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

会议类型: 国际会议

会议名称: 15th International Conference on Photosynthesis(第15届国际光合作用大会)

会议地点: 北京

会议语种:英文

页码: 447-450

在线出版日期: 2010-08-22（万方平台首次上网日期，不代表论文的发表时间）