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作 者 ：张毅;顾慰连;戴俊英

期 刊 ：作物学报 1992年 18卷 05期 页码：397-400

关键词：低温逆境；玉米；籽粒产量；光合作用 SOD活性；

Keywords:Chilling stress, Maize, kernel yield, Photosynthesis, SOD activity,

摘 要 ：玉米在孕穗期和灌浆期,尤其是在孕穗期遇低温逆境会导致光合速率下降,光合有效叶面积降低,叶片和雌穗(或籽粒)超氧物歧化酶(SOD)活性下降、丙二醛含量剧增和相对电导率提高,造成低温冷害。孕穗期低温处理主要抑制了雌穗分化和发育,减少了穗粒数,灌浆期低温逆境主要影响了籽粒灌浆,致使百粒重下降,引起产量降低。

Abstract:Chilling stress (10℃) at booting and filling stages, especially at booting stagedicreased photosynthetic rate and leaf area per plant, lowered SOD activity and in-creased MDA content and relative conductivity of leaf and ear (or kernel) in maize,thus causing chilling injury. Low temperature at boot

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