Physiological and transcriptomic evidence of antioxidative system and ion transport in chromium detoxification in germinating seedlings of soybean*
文献类型： 外文期刊
作者： Chen, Guang 1 ; Wang, Jian 1 ; He, Guoxin 1 ; Li, Sujuan 1 ; Li, Xuetong 1 ; Tao, Xiaoyuan 1 ; Liang, Shuang 1 ; Deng, Fenglin 2 ; Zeng, Fanrong 2 ; Chen, Zhong-Hua 4 ; Xu, Shengchun 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Cent Lab, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China
2.Yangtze Univ, Coll Agr, Hubei Collaborat Innovat Ctr Grain Ind, Jingzhou, Peoples R China
3.China Jiliang Univ, Coll Life Sci, Hangzhou, Zhejiang, Peoples R China
4.Western Sydney Univ, Sch Sci, Penrith, NSW 2751, Australia
5.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW 2751, Australia
关键词： Chromium; Glycine max L; Toxicity; Germinating seedlings; ROS signaling; Ion transporters
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.9； 五年影响因子：9.5 ）
ISSN： 0269-7491
年卷期： 2023 年 320 卷
页码：
收录情况： SCI
摘要： Chromium (Cr) toxicity impairs the productivity of crops and is a major threat to food security worldwide. However, the effect of Cr toxicity on seed germination and transcriptome of germinating seedlings of soybean crop has not been fully explored. In this study, two Cr-tolerant lines (J82, S125) and two Cr-sensitive ones (LD1, RL) were screened out of twenty-one soybean (Glycine max L.) genotypes based on seed germination rate, seed germinative energy, seed germination index, and growth of germinating seedlings under 50 mg L-1 Cr treatment. We found that Cr stress inhibits the growth of soybean seed germinating seedlings due to the Cr-induced overaccumulation of reactive oxygen species (ROS). Significantly different levels of element contents, antioxidant enzyme activities, malondialdehyde content were observed in the four soybean genotypes with contrasting Cr tolerance. Further, a total of 13,777 differentially expressed genes (DEGs) were identified in transcriptomic sequencing and 1298 DEGs in six gene modules were found highly correlated with the physiological traits by weighted correlation network analysis (WGCNA) analysis. The DEGs encoding antioxidant enzymes, transcription factors, and ion transporters are proposed to confer Cr tolerance in soybean germinating seedlings by reducing the uptake and translocation of Cr, decreasing the level of ROS, and keeping the osmotic balance in soybean germinating seedings. In conclusion, our study provided a molecular regulation network on soybean Cr tolerance at seed germinating stage and identified candidate genes for molecular breeding of low Cr accumulation soybean cultivars.
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