Effects of Salinity-Stress on Seed Germination and Growth Physiology of Quinclorac-Resistant Echinochloa crus-galli (L.) Beauv
文献类型： 外文期刊
作者： Wu, Lamei 1 ; Yang, Haona 1 ; Li, Zuren 1 ; Wang, Lifeng 1 ; Peng, Qiong 2 ;
作者机构： 1.Hunan Acad Agr Sci, Hunan Weed Sci Key Lab, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, Changsha 410125, Peoples R China
关键词： quinclorac-resistant E. crus-galli; seed germination; seedling growth; GST activity; salinity stress
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 5 期
页码：
收录情况： SCI
摘要： With the expansion of saline-alkaline tolerant rice in China, the effects of salinity stress (NaCl) on quinclorac-resistant Echinochloa crus-galli (L.) Beauv (E. crus-galli) is unclear. In this study, the growth chamber experiment was conducted to test the germination and growth physiology of seven populations of E. crus-galli with quinclorac-different resistance levels which were collected from Hunan province. The results showed that a significant decrease of the germination rate and fresh weight of the plants, as well as the length of the roots and young shoots appeared, along with the increased resistance while treated with NaCl. However, no significant differences were detected between quinclorac-resistant and -susceptible E. crus-galli populations while without NaCl treatment. A further study with spectrophotometer showed that the salinity treatment resulted in the increase of the GST activity in all E. crus-galli populations, which are more obvious in those resistant biotypes, and transcriptomics revealed that salt stress reduces the adaptability of quinclorac-resistant E. crus-galli by reducing the biosynthesis, activities of antioxidant enzymes and metabolic enzyme. This study demonstrated that salinity stress (NaCl) may reduce the adaptability of quinclorac-resistant E. crus-galli.
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