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Contribution of Two Different Na+ Transport Systems to Acquired Salinity Tolerance in Rice
Plant Science ( IF 5.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.plantsci.2020.110517 Karthika Sriskantharajah 1 , Shota Osumi 1 , Sumana Chuamnakthong 1 , Mami Nampei 2 , Junrey C Amas 3 , Glenn B Gregorio 4 , Akihiro Ueda 5
Plant Science ( IF 5.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.plantsci.2020.110517 Karthika Sriskantharajah 1 , Shota Osumi 1 , Sumana Chuamnakthong 1 , Mami Nampei 2 , Junrey C Amas 3 , Glenn B Gregorio 4 , Akihiro Ueda 5
Affiliation
To elucidate the mechanisms of salt acclimation, physiological parameters of 70 rice varieties were compared under control and salt stress conditions after the acclimation treatment. The results indicated that some rice varieties had the ability to acclimatize to salt stress, exhibiting improved growth following the acclimation treatment under subsequent salinity stress compared to those without acclimation treatment. Conversely, some varieties exhibited reduced growth both with and without acclimation treatment under subsequent salinity stress. Acclimatized varieties had differential patterns of Na+ accumulation in the leaf blades because some varieties reduced Na+ accumulation under salinity stress, whereas others did not. Under salt stress, the acclimatized varieties with low Na+ accumulation in the leaf blades highly induced the expression of the OsHKT1;5 gene in the roots, which may contribute to Na+ exclusion from the shoots. On the other hand, the acclimatized varieties with high Na+ accumulation in the leaf blades exhibited higher induction of the OsNHX1 gene, whose gene product participates in the compartmentalization of Na+ into vacuoles. Thus, rice develops different mechanisms of salinity acclimation using two Na+ transport systems, and active regulation of Na+ transport at the transcription level may be involved in the salt acclimation process and enhance salinity tolerance.
中文翻译:
两种不同的 Na+ 转运系统对水稻获得性耐盐性的贡献
为阐明盐驯化机制,对驯化处理后70个水稻品种在对照和盐胁迫条件下的生理参数进行了比较。结果表明,一些水稻品种具有适应盐胁迫的能力,与未经驯化处理的水稻品种相比,在随后的盐胁迫下进行驯化处理后生长得到改善。相反,一些品种在随后的盐胁迫下,无论有无驯化处理,都表现出生长减慢。驯化品种在叶片中具有不同的 Na+ 积累模式,因为一些品种在盐度胁迫下减少了 Na+ 积累,而其他品种则没有。在盐胁迫下,叶片中Na+低积累的驯化品种高度诱导根中OsHKT1;5基因的表达,这可能有助于Na+从芽中排除。另一方面,叶片中Na+积累高的驯化品种表现出对OsNHX1基因的更高诱导,其基因产物参与Na+进入液泡的区室化。因此,水稻利用两个 Na+ 转运系统形成不同的盐度驯化机制,转录水平上对 Na+ 转运的主动调节可能参与盐驯化过程并增强耐盐性。叶片中 Na+ 积累高的驯化品种表现出对 OsNHX1 基因的更高诱导,其基因产物参与 Na+ 形成液泡的区室化。因此,水稻利用两个 Na+ 转运系统形成不同的盐度驯化机制,转录水平上对 Na+ 转运的主动调节可能参与盐驯化过程并增强耐盐性。叶片中 Na+ 积累高的驯化品种表现出对 OsNHX1 基因的更高诱导,其基因产物参与 Na+ 形成液泡的区室化。因此,水稻利用两个 Na+ 转运系统形成不同的盐度驯化机制,转录水平上对 Na+ 转运的主动调节可能参与盐驯化过程并增强耐盐性。
更新日期:2020-08-01
中文翻译:
两种不同的 Na+ 转运系统对水稻获得性耐盐性的贡献
为阐明盐驯化机制,对驯化处理后70个水稻品种在对照和盐胁迫条件下的生理参数进行了比较。结果表明,一些水稻品种具有适应盐胁迫的能力,与未经驯化处理的水稻品种相比,在随后的盐胁迫下进行驯化处理后生长得到改善。相反,一些品种在随后的盐胁迫下,无论有无驯化处理,都表现出生长减慢。驯化品种在叶片中具有不同的 Na+ 积累模式,因为一些品种在盐度胁迫下减少了 Na+ 积累,而其他品种则没有。在盐胁迫下,叶片中Na+低积累的驯化品种高度诱导根中OsHKT1;5基因的表达,这可能有助于Na+从芽中排除。另一方面,叶片中Na+积累高的驯化品种表现出对OsNHX1基因的更高诱导,其基因产物参与Na+进入液泡的区室化。因此,水稻利用两个 Na+ 转运系统形成不同的盐度驯化机制,转录水平上对 Na+ 转运的主动调节可能参与盐驯化过程并增强耐盐性。叶片中 Na+ 积累高的驯化品种表现出对 OsNHX1 基因的更高诱导,其基因产物参与 Na+ 形成液泡的区室化。因此,水稻利用两个 Na+ 转运系统形成不同的盐度驯化机制,转录水平上对 Na+ 转运的主动调节可能参与盐驯化过程并增强耐盐性。叶片中 Na+ 积累高的驯化品种表现出对 OsNHX1 基因的更高诱导,其基因产物参与 Na+ 形成液泡的区室化。因此,水稻利用两个 Na+ 转运系统形成不同的盐度驯化机制,转录水平上对 Na+ 转运的主动调节可能参与盐驯化过程并增强耐盐性。