NPR1-dependent salicylic acid signaling is not involved in elevated CO2-induced heat stress tolerance in Arabidopsis thaliana

文献类型： 外文期刊

第一作者： Li, Xin

作者： Li, Xin;Ahammed, Golam Jalal;Li, Xin;Yu, Jingquan;Shi, Kai

作者机构：

关键词： Arabidopsis;elevated carbon dioxide;heat-shock proteins;heat stress;photochemical efficiency of PSII;salicylic acid;ABA;abscisic acid;Fv;Fm;maximum photochemical efficiency of PSII;HS;heat stress;HSPs;heat-shock proteins;MAPK;mitogen activated protein kinase;npr1;nonexpressor of pathogenesis-related gene 1;PSII;photosystems II;SA;salicylic acid

期刊名称：PLANT SIGNALING & BEHAVIOR （ 影响因子：2.247； 五年影响因子：2.369 ）

ISSN： 1559-2316

年卷期： 2015 年 10 卷 6 期

页码：

收录情况： SCI

摘要： Elevated CO2 can protect plants from heat stress (HS); however, the underlying mechanisms are largely unknown. Here, we used a set of Arabidopsis mutants such as salicylic acid (SA) signaling mutants nonexpressor of pathogenesis-related gene 1 (npr1-1 and npr1-5) and heat-shock proteins (HSPs) mutants (hsp21 and hsp70-1) to understand the requirement of SA signaling and HSPs in elevated CO2-induced HS tolerance. Under ambient CO2 (380 mu mol mol(-1)) conditions, HS (42 degrees C, 24h) drastically decreased maximum photochemical efficiency of PSII (Fv/Fm) in all studied plant groups. Enrichment of CO2 (800 mu mol mol(-1)) with HS remarkably increased the Fv/Fm value in all plant groups except hsp70-1, indicating that NPR1-dependent SA signaling is not involved in the elevated CO2-induced HS tolerance. These results also suggest an essentiality of HSP70-1, but not HSP21 in elevated CO2-induced HS mitigation.

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