Dynamic Change Regularity of Nutritional Components during Seed Development of Sesame under Saline and Alkaline Stress

doi:10.15933/j.cnki.1004-3268.2016.04.010

Abstract：To investigate the dynamic change regularity of nutritional components during the seed development of sesame under saline and alkaline stress, the sesame cultivar Yuzhi 11 was used as experimental material. The laboratory experiment was performed to explore the effects of saline and alkaline stress(1,2,3 g/L NaCl and NaHCO3 ) in different durations(24,48,60,72,84 h) at 23 ℃ on germination rate,root length,fresh weight,soluble sugar content,protein content,sesamin and sesamolin content. Results showed that with the increase of germinating rate the root length, fresh weight, soluble sugar content increased gradually,but protein,sesamin and sesamolin content decreased gradually under normal condition( distilled water treatment). Under saline and alkaline stress,the germinating rate was not influenced,but the increase of root length and fresh weight were delayed in different degree. Root length, fresh weight,soluble sugar content were lower than control group(distilled water treatment),but protein content,sesamin and sesamolin content were higher than control group under saline and alkaline stress. Correlation analysis showed that germination time was very significantly positively correlated with root length,fresh weight, soluble sugar content, but significantly negatively correlated with protein content, sesamin and sesamolin content. Saline and alkaline concentration was very significantly negatively correlated with root length,fresh weight,soluble sugar content,but significantly positively correlated with protein content,sesamin and sesamolin content.