Effects of Salinity-Stress on Seed Germination and Growth Physiology of Quinclorac-Resistant Echinochloa crus-galli (L.) Beauv

With the expansion of saline-alkaline tolerant rice in China, effects salinity stress (NaCl) on quinclorac-resistant Echinochloa crus-galli (L.) Beauv (E. crus-galli) is unclear. In this study, growth chamber experiment was conducted to test germination and physiology seven populations E. with quinclorac-different resistance levels which were collected from Hunan province. The results showed that a significant decrease rate fresh weight plants, as well length roots young shoots appeared, along increased while treated NaCl. However, no differences detected between -susceptible without NaCl treatment. A further study spectrophotometer treatment resulted increase GST activity all populations, are more obvious those resistant biotypes, transcriptomics revealed salt reduces adaptability by reducing biosynthesis, activities antioxidant enzymes metabolic enzyme. This demonstrated may reduce crus-galli.