Differential Physiological Responses to Salt Stress between Salt-Sensitive and Salt-Tolerant japonica Rice Cultivars at the Post-Germination and Seedling Stages
文献类型： 外文期刊
作者： Ye, Shenghai 1 ; Huang, Zhibo 2 ; Zhao, Guibin 2 ; Zhai, Rongrong 1 ; Ye, Jing 1 ; Wu, Mingming 1 ; Yu, Faming 1 ; Zhu, Guofu 1 ; Zhang, Xiaoming 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Peoples R China
2.South China Agr Univ, Lab Seed Sci & Technol, Guangdong Key Lab Plant Mol Breeding, Guangdong Lab Lingnan Modern Agr,State Key Lab Co, Guangzhou 510642, Peoples R China
关键词： Oryza sativa; salt stress; Na+/K+ homeostasis; hydrogen peroxide; seed germination; seedling growth
期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）
ISSN：
年卷期： 2021 年 10 卷 11 期
页码：
收录情况： SCI
摘要： Soil salinity is a key source of abiotic stress in the cultivation of rice. In this study, two currently cultivated japonica rice species-Zhegeng 78 (salt-tolerant) and Zhegeng 99 (salt-sensitive)-with similar backgrounds were identified and used to investigate their differential responses to salt stress at the post-germination and seedling stages. Quantitative RT-PCR analysis demonstrated that the expression of OsSOS1, OsHAK1, and OsHAK5 at the post-germination stage, and the expression of OsHKT1,1, OsHTK2,1, and OsHAK1 at the seedling stage, were significantly higher in the salt-tolerant Zhegeng 78 compared with those of the salt-sensitive Zhegeng 99 under salt stress. The significantly lower Na+ net uptake rate at the post-germination and higher K+ net uptake rates at the post-germination and seedling stages were observed in the salt-tolerant Zhegeng 78 compared with those of the salt-sensitive Zhegeng 99 under salt stress. Significantly higher activity of peroxidase (POD) and the lower hydrogen peroxide (H2O2) accumulation were observed in the salt-tolerant Zhegeng 78 compared with those of salt-sensitive Zhegeng 99 under salt stress at the seeding stage. The salt-tolerant Zhegeng 78 might be valuable in future cultivation in salinity soils.
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