外源ABA对小麦抗旱性和产量性状的影响  

Effects of Exogenous ABA on Wheat Drought Resistance and Yield

作　　者：席吉龙[1] 张建诚[1] 席凯鹏[1] 姚景珍[1] 段黎杰 刘跃鹏[1] 

机构地区：[1]山西省农业科学院棉花研究所,山西运城044000 [2]新绛县农业委员会,山西新绛043100

出　　处：《作物杂志》2014年第3期105-108,共4页Crops

基　　金：国家科技支撑计划项目"生物抗耐灾品种与减灾生化制剂研发"(2012BAD20B06-06);山西省科技攻关项目"旱地小麦高效用水关键技术研究"(20120311001-7)

摘　　要：研究了干旱胁迫下外源ABA对抗旱小麦品种晋麦47号不同生长阶段的抗旱性的效果。结果表明,一定浓度的外源ABA浸种能分别提高小麦种子发芽势211.99%、发芽率63.00%、相对发芽率62.87%,利于苗齐苗壮,增强发芽期抗旱性。苗期喷施ABA能促进幼苗生长,幼苗株高、茎叶干重、根干重分别显著提高12.74%、9.60%、13.00%,伤害率比对照降低11.51%。孕穗期喷施ABA,促进了光合作用,增强了抗旱能力,叶片相对含水率提高46.39%,叶绿素荧光参数Fv/Fm值极显著提高,增加产量9.26%。This experiment was conducted to study the effects of exogenous ABA on wheat seed germination, plant growth and yield under water stress by using the drought-resistant wheat variety of Jinmai 47. The results showed that seed presoaking with exogenous ABA could increase wheat germination potential by 211.99% , germination percentage by 63.00% ,relative germination percentage by 62.87% , and enhanced drought resistance at germination stage. Spraying ABA at seedling stage could promote plant growth, and significantly increase plant height, shoot and root dry matter weight by 12.74% ,9.60% and 13.00% , respectively. Injuring rate was decreased by 11.51% compared with the control. Spraying ABA at booting stage could promote photosynthesis and improve drought resistance. Leaf relative water content significantly improved by 46.39%. Chlorophyll fluorescent parameters Fv/Fm increased by 2.52% and yield increased by 9.26%.

关 键 词：干旱胁迫 外源ABA 小麦 抗旱性 产量 

分 类 号：S512.1[农业科学—作物学]