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植物学报  2015 

一份水稻叶片反卷突变体的遗传分析及电镜显微观察

DOI: 10.3724/SP.J.1259.2015.00191, PP. 191-197

Keywords: 水稻,叶片反卷,遗传分析,电镜扫描,气孔,泡状细胞

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Abstract:

?叶片是植物进行光合作用的重要器官。叶片适度卷曲能够提高水稻(Oryzasativa)生长中后期群体基部的光能利用率,因而有利于水稻产量的提高。该研究首先在水稻T-DNA插入突变体库中发现一份叶片反卷的突变体。遗传分析表明,该性状受到1对隐性核基因控制。扫描电镜观察结果显示,突变体成熟叶片上下表皮的气孔发生了畸变;且叶片上表皮气孔数目增多,而下表皮气孔数目与野生型基本相同。叶片横切面电镜观察结果表明,与野生型相比,突变体叶片的泡状细胞数目和面积在早期(二叶期)就开始增加,在成熟期更加明显,这可能是导致叶片反卷的主要原因。

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