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Effect of Plant Growth Regulators on the Growth of Wheat tiller buds is Related to Changes in Endogenous Hormones

Effect of Plant Growth Regulators on the Growth of Wheat Til...

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第十五次中国小麦栽培科学学术研讨会

作者： CAI Tie,XU Haichen,YIN YanPing,YANG Weibing,PENG Dianliang,NI Yingli,XU Cailong,YANG Dongqing,Wang Zhenlin (National Key Laboratory of Crop Biology,Shandong Agricultural University,Tai’an 271018,Shandong,P.R.China.)

Hormones play important roles in regulating the growth of wheat tiller ***,little is known about the relationships and the underlying mechanisms between endogenous hormones and the growth of wheat tiller buds induced by exogenous *** the study,two winter wheat cultivars(Shannong 15 and Shannong 8355) were used to investigate the effect of exogenous indole-3-acetic acid(IAA),gibberellic acid 3(GA),abscisic acid(ABA),and zeatin(ZT) on the tiller buds outgrowth,and the relationship between endogenous hormones and the growth of tiller buds. The results showed that exogenous IAA and GA completely inhibited the tiller buds growth,and ABA significantly slowed the growth rate of tiller buds,while the tiller buds growth was not affected by exogenous ZT compared with the *** IAA increased the IAA contents and the ratio of IAA to ZT,but inhibited the increase in the ZT *** the same time,the application of GA increased contents of IAA,GAs,and ABA,the ratios of IAA to ZT and ABA to ZT,but decrease ZT *** addition,ABA treatment increased the ABA contents and the ratios of ABA to ZT,but slowed the increase in the ZT *** to correlation analysis,the tiller buds growth was significantly and positively correlated with the content of ZT,whereas significantly and negatively correlated with the IAA contents and the ratios of IAA to ZT and ABA to ***,no significant correlation was observed between the tiller buds growth and the contents of GAs and *** results suggested that IAA and ZT play key roles in regulating the growth of wheat tiller buds,and exogenous hormones regulated the contents of IAA and ZT,the ratio of IAA to ZT,and the ratio of ABA to ZT in tiller nodes,thus regulating the growth of wheat tiller buds.

关键词： Abscisic acid Gibberellic acid 3 Growth Indole-3-acetic acid tiller buds Wheat(Triticum aestivum L.),Zeatin

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