Variation of soluble sugar,starch and plant hormones contents in sesame dominant genic male sterile line during bud development

Plant hormones play a key role in anther development. With the technology of enzyme- linked immunosorbent assay( ELISA),contents of four endogenous hormones( IAA,ABA,JA and SA) in buds were evaluated at different developmental stages. The ratios of different hormones,as well as contents of soluble sugar and starch were compared among male sterile and fertile plants. The results indicated that: 1) during anther development,the variation trends and contents of four hormones were distinctive between male sterile and fertile plants,and the significant decrease of IAA and increase of ABA in male sterile plant could be connected with the occurrence of male sterility; 2) significant increase of JA and ABA and the decrease of IAA were observed in leaf in male sterile plants; 3) the variation trends and ratios of IAA / ABA,IAA / SA and IAA / JA were different among male sterile and fertile plants,indicating that the hormonal imbalance was also responsible for anther abortion; 4) the soluble sugar and starch contents in buds of male sterile plants were higher than that in fertile plants,which was at least partially responsible for male sterility.