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Molecular Insights into Salinity Responsiveness in Contrasting Genotypes of Rice at the Seedling Stage

文献类型： 外文期刊

作者： Zhang, Jingjing 1 ; Xu, Tingting 1 ; Liu, Yiran 1 ; Chen, Tong 1 ; Zhang, Qiuxin 1 ; Li, Weiyan 1 ; Zhou, Hongkai 2 ; Zhang, Yuexiong 3 ; Zhang, Zemin 1 ;

作者机构： 1.South China Agr Univ, State Key Lab Conservat & Utilizat Subtrop Agro, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou 510642, Peoples R China

2.Guangdong Ocean Univ, Coll Agr, Zhanjiang 524088, Peoples R China

3.Guangxi Acad Agr Sci, Rice Res Inst, Guangxi Key Lab Rice Genet & Breeding, Nanning 530007, Peoples R China

关键词： rice; salinity response; HAKs; seedling stage; transcriptome; AsA-GSH pathway

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：6.208； 五年影响因子：6.628 ）

ISSN：

年卷期： 2022 年 23 卷 3 期

页码：

收录情况： SCI

摘要： Salinity is one of the most common unfavorable environmental conditions that limits plant growth and development, ultimately reducing crop productivity. To investigate the underlying molecular mechanism involved in the salinity response in rice, we initially screened 238 rice cultivars after salt treatment at the seedling stage and identified two highly salt-tolerant cultivars determined by the relative damage rate parameter. The majority of cultivars (94.1%) were ranked as salt-sensitive and highly salt-sensitive. Transcriptome profiling was completed in highly salt-tolerant, moderately salt-tolerant, and salt-sensitive under water and salinity treatments at the seedling stage. Principal component analysis displayed a clear distinction among the three cultivars under control and salinity stress conditions. Several starch and sucrose metabolism-related genes were induced after salt treatment in all genotypes at the seedling stage. The results from the present study enable the identification of the ascorbate glutathione pathway, potentially participating in the process of plant response to salinity in the early growth stage. Our findings also highlight the significance of high-affinity K+ uptake transporters (HAKs) and high-affinity K+ transporters (HKTs) during salt stress responses in rice seedlings. Collectively, the cultivar-specific stress-responsive genes and pathways identified in the present study act as a useful resource for researchers interested in plant responses to salinity at the seedling stage.

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