Comparative proteome analyses reveal that nitric oxide is an important signal molecule in the response of rice to aluminum toxicity

文献类型： 外文期刊

第一作者： Yang, Liming

作者： Yang, Liming;Luo, Yuming;Tian, Dagang;Hu, Xiangyang;Tian, Dagang;Todd, Christopher D.

作者机构：

关键词： aluminum;nitric oxide;reactive nitrogen species;reactive oxygen species;S-nitrosoglutathione reductase

期刊名称：JOURNAL OF PROTEOME RESEARCH （ 影响因子：4.466； 五年影响因子：4.352 ）

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收录情况： SCI

摘要： Acidic soils inhibit crop yield and reduce grain quality. One of the major contributing factors to acidic soil is the presence of soluble aluminum (Al ~(3+)) ions, but the mechanisms underlying plant responses to Al ~(3+) toxicity remain elusive. Nitric oxide (NO) is an important messenger and participates in various plant physiological responses. Here, we demonstrate that Al~(3+) induced an increase of NO in rice seedlings; adding exogenous NO alleviated the Al~(3+) toxicity related to rice growth and photosynthetic capacity, effects that could be reversed by suppressing NO metabolism. Comparative proteomic analyses successfully identified 92 proteins that showed differential expression after Al~(3+) or NO treatment. In particular, some of the proteins are involved in reactive oxygen species (ROS) and reactive nitrogen species (RNS) metabolism. Further analyses confirmed that NO treatment reduced Al~(3+)-induced ROS and RNS toxicities by increasing the activities and protein expression of antioxidant enzymes, as well as S-nitrosoglutathione reductase (GSNOR). Suppressing GSNOR enzymatic activity aggravated Al~(3+) damage to rice and increased the accumulation of RNS. NO treatment altered the expression of proteins associated with cell wall synthesis, cell division and cell structure, calcium signaling and defense responses. On the basis of these results, we propose that NO activates multiple pathways that enhance rice adaptation to Al~(3+) toxicity. Such findings may be applicable to crop engineering to enhance yield and improve stress tolerance.

分类号： Q7

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