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硅与油菜素内酯协同调控光合-抗氧化-渗透平衡通路增强玉米抗旱性 ...
当玉米遭遇40% WHC的干旱胁迫(DS)时,其光合机构与细胞膜系统遭受双重打击。有趣的是,外源施加4 mM硅(Si)和5 μM油菜素内酯(brassinosteroids, BR)就像给植物装上"复合防护盾"——不仅使叶绿素含量回升至对照组的92.3%,更激活了超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)组成的"抗氧化三联体 ...
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