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Differential Physiological Responses to Salt Stress between Salt-Sensitive and Salt-Tolerant japonica Rice Cultivars at the Post-Germination and Seedling Stages.


ABSTRACT: 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.

SUBMITTER: Ye S 

PROVIDER: S-EPMC8696616 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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Differential Physiological Responses to Salt Stress between Salt-Sensitive and Salt-Tolerant <i>japonica</i> Rice Cultivars at the Post-Germination and Seedling Stages.

Ye Shenghai S   Huang Zhibo Z   Zhao Guibin G   Zhai Rongrong R   Ye Jing J   Wu Mingming M   Yu Faming F   Zhu Guofu G   Zhang Xiaoming X  

Plants (Basel, Switzerland) 20211111 11


Soil salinity is a key source of abiotic stress in the cultivation of rice. In this study, two currently cultivated <i>japonica</i> 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 <i>OsSOS1</i>, <i>OsHAK1</i>, and <i>OsHAK5</i> at the post-germination stage  ...[more]

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