Hormone Levels in Functional Leaves of Tillers and Their Correlation to Panicle Setting in Rice

Super hybrid rice Xieyou 9308 was planted as experimental material,the hormone contents in functional leaves from different tillers were analyzed by means of ELISA.At the same time,in order to clarify the correlation between hormones and panicle setting rate,different tillers were labeled to follow up their panicle setting rate.It was showed that the level of IAA、GA_1 and ABA in functional leaves from different tillers played a different fluctuation pattern while these tillers growed up.There were a positive correlation(at 0.01 significant level) between IAA level in functional leaves of tillers and their panicle setting rate,a negative correlation(at 0.01 significant level) between ABA level and panicle setting rate,and a positive correlation(at 0.01 significant level) between the ratio of(IAA+GA_1)/ABA and panicle setting rate.