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核农学报  2013 

三唑酮预处理对花期大豆干旱胁迫及复水后生理特性及产量的影响

DOI: 10.11869/hnxb.2013.11.1749, PP. 1749-1755

Keywords: 干旱,三唑酮,大豆,生理特性,产量

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Abstract:

为探明三唑酮预处理对增强大豆抗旱性的影响,以南农99-6为材料,通过盆栽试验,研究了三唑酮预处理对花期干旱条件和复水后大豆叶片抗氧化系统、内源激素、光合性能及农艺性状的影响。结果表明:三唑酮预处理显著提高了不同水分条件下大豆叶片的SOD、POD酶活性及GSH含量,但降低了AsA含量;同时三唑酮预处理降低了胁迫期间和复水以后叶片H2O2、MDA含量和O2-的产生速率以及EL的值,但对正常水分条件下影响不显著;此外三唑酮预处理显著提高了干旱胁迫下及复水后大豆叶片Pn、Ci、Gs、Tr的值和IAA的含量,但降低了GA和ABA的含量。干旱条件下,三唑酮预处理显著提高了单株荚数、单株粒数、百粒重,增加了单株产量。

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