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OALib Journal期刊
ISSN: 2333-9721
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外源柠檬酸对水稻铜毒害的缓解效应
DOI: 10.3724/SP.J.1145.2010.00617, PP. 617-621
Keywords: 水稻,铜毒害,柠檬酸,缓解效应,生理特性
Abstract:
以水稻（宜香4106，oryzasatival.cv.yixiang4106）种子为实验材料，研究铜（cu）对水稻种子萌发和生长的影响，以及外施柠檬酸对铜毒害的缓解效应.结果表明，在不同浓度cu2+（20、50、80μmol/l）胁迫下，水稻幼苗的芽长、胚根长、须根数和活力指数均明显下降.当cu2+浓度达到80μmol/l时，与未胁迫处理相比，幼苗芽长和胚根长度抑制率分别高达23.6%和96.7%.2mmol/l的外源柠檬酸可缓解cu2+的抑制作用，水稻种子萌发的活力指数提高，根系长度增长近7倍，幼苗平均每株根数增加约8.8倍，水稻幼苗叶片中丙二醛（mda）含量降低，叶绿素含量提高41.9%，可溶性蛋白质的含量为铜胁迫处理的2.9倍，超氧化物歧化酶（sod）、过氧化物酶（pod）的活性均显著提高.图3参20
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