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Physiological and Proteomic Analyses Reveal Effects of Putrescine-Alleviated Aluminum Toxicity in Rice Roots

Rice science 2021年第6期28卷 579-593,I0040-I0048页

作者： ZHU Chunquan HU Wenjun CAO Xiaochuang ZHU Lianfeng KONG Yali JIN Qianyu SHEN Guoxin WANG Weipeng ZHANG Hui ZHANG Junhua State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China State Key Laboratory far Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products Zhejiang Academy of Agricultural SciencesHangzhou 310021China Agricultural Resources and Environment Institute Jiangsu Academy of Agricultural SciencesNanjing 210014China College of Environmental and Resource Science Shanxi UniversityTaiyuan 030006China

The effects of putrescine on improving rice growth under aluminum(Al)toxicity conditions have been previously demonstrated,however,the underlying mechanism remains *** this study,treatment with 50 pmol/L Al significantly decreased rice root growth and whole rice dry weight,inhibited Ca2+uptake,decreased ATP syn thesis,and in creased Al,H2O2 and malon dialdehyde(MDA)con tents,whereas the application of putrescine mitigated these negative *** increased root growth and total dry weight of rice,reduced total Al content,decreased H2O2 and MDA contents by increasing antioxidant enzyme(superoxide dismutase,peroxidase,catalase and glutathione S・transferase)activities,increased Ca2+uptake and energy product!oru Proteomic analyses using data-independent acquisition successfully identified 7934 proteins,and 59 representative proteins exhibiting fold-change values higher than 1.5 were randomly *** the results of the proteomic and biochemical analyses,we found that putrescine significantly inhibited ethylene biosynthesis and phosphorus uptake in rice roots,increased pectin methylation,decreased pectin content and apoplastic Al deposit!on in rice *** also alleviated Al toxicity by repairing damaged DNA and increasing the proteins involved in maintaining plasma membra ne integrity and normal cell *** fin dings improve our understanding of how putrescine affects the rice response to Al toxicity,which will facilitate further studies on environmental protection,crop safety,in novations in rice performance and real-world producti on.

关键词： aluminum toxicity antioxidant enzyme data-independent analysis putrescine proteomics rice

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