膨大素对淮山内源激素变化的影响  

Effect of Expansin on Endogenous Hormones of Yam

作　　者：吴建明[1] 甘秀芹[1] 韦本辉[1] 韦民政[2] 

机构地区：[1]广西农业科学院经济作物研究所,广西南宁530007 [2]广西农业科学院能源作物研究所,广西南宁530007

出　　处：《北方园艺》2010年第20期71-73,共3页Northern Horticulture

基　　金：广西青年基金资助项目(桂科青0640021)

摘　　要：以桂淮2号薯为试材,研究了结薯初期喷施400 mg/L去豆膨大素对薯块膨大及内源激素变化的影响。结果表明:去豆膨大素处理后能抑制淮山疯长,使得更多的营养物质转向薯块。去豆膨大素处理的GA3含量显著低于对照;ABA含量均显著高于对照;乙烯释放量稍高于对照,IAA含量从第10天开始稍低于对照;ZR含量比对照的稍低,但差异均不显著。从ABA/IAA、GA3/IAA、ZR/IAA和EH/IAA的比值看,ABA/IAA的比值处理比对照显著提高,而GA3/IAA的比值要比对照低。这说明去豆膨大素处理主要通过调节ABA和赤霉素含量能抑制地上部分生长,其次是通过乙烯释放量和生长素含量来达到抑制地上部分生长的效果。Taking yam variety ＂Guihuai No.2＂ as test material,the plants were sprayed with 400 mg/L expansin at early tubers stage.The results showed that expansin can inhibit yam shoot growing and making more nutrients turn to tuber.The content of GA3 in the leaf was significantly lower in the expansin treatment than in the control.While opposite changes were observed for the content of ABA,and was significantly higher than that in the control.The ethylene production was slightly higher in the expansin treatment than in the control,while the content of IAA was slightly lower in the expansin treatment since the 10th day after treatment,and same for the content of ZR as IAA,but the differences were not significant between the control and the in the expansin treatment.From the ratio of ABA/AA,GA3/IAA,ZR/IAA and EH/IAA;the control ratio of ABA/IAA was significantly lower than the treatment,the control ratio of ZR/IAA and EH/IAA also lower than treatment,but the control ratio of GA3/IAA higher than the control.These results suggest that the inhibit yam shoot growing might mainly be regulated by the contents ABA and GA,and then IAA and ethylene.

关 键 词：膨大素 淮山 激素 

分 类 号：S539[农业科学—作物学]