tailieunhanh - báo cáo khoa học: " Salicylic acid alleviates decreases in photosynthesis under heat stress and accelerates recovery in grapevine leaves"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Salicylic acid alleviates decreases in photosynthesis under heat stress and accelerates recovery in grapevine leaves | Wang et al. BMC Plant Biology 2010 10 34 http 1471-2229 10 34 BMC Plant Biology RESEARCH ARTICLE Open Access Salicylic acid alleviates decreases in photosynthesis under heat stress and accelerates recovery in grapevine leaves 1 31 2 1 1 Li-Jun Wang Ling Fan Wayne Loescher Wei Duan Guo-Jie Liu Jian-Shan Cheng Hai-Bo Luo Shao-Hua Li 4 Abstract Background Although the effect of salicylic acid SA on photosynthesis of plants including grapevines has been investigated very little is yet known about the effects of SA on carbon assimilation and several components of PSII and acceptor side In this study the impact of SA pretreatment on 1471-2229-10-34 -e heat stress 25 C during heat stress 43 C letic measures included gas exchange ivation state. The levels of heat shock electron transport donor side reaction cente photosynthesis was evaluated in the leaves o for 5 h and through the following recovery parameters PSII electron transport energy dis proteins HSPs in the chloroplast were also in Results SA did not significantly P inf But SA did alleviate declines in Pn and Rubisc parameters donor side acceptor side and rea recovery of Pn in SA-treated leaves was accel thesis rate Pn of leaves before heat stress. d not alter negative changes in PSII heat stress. Following heat treatment the .e control H2O-treated leaves and donor and acceptor parameters of PSII in SA-treated leaves recovered to normal levels more rapidly than in the controls. Rubisco however was not significantly P influenced by SA. Before heat stress SA did not affect level of HSP 21 but the HSP21 immune signal increased in both SA-treated and control leaves during heat stress. During the recovery period HSP21 levels remained high through the end of the experiment in the SA-treated leaves but decreased in controls. Conclusion SA pretreatment alleviated the heat stress induced decrease in Pn mainly through maintaining higher Rubisco activition state and it accelerated the .