铝胁迫对大豆叶片光合特性的影响

摘要/Abstract

摘要： 以大豆浙春2号、浙春3号和9703等3个品种(系)为材料,设置不同铝处理浓度,研究了铝对大豆叶片光合作用特性的影响.结果表明,铝处理抑制了大豆叶片叶绿素的合成,降低了大豆叶片叶绿素含量(5%～35%),使a/b值下降,气孔阻力增加10%～35%,气孔导度降低10%～40%,光合速率和蒸腾速率分别下降了5%～40%和20%～50%,水分利用率下降15%～50%.可见,铝胁迫对大豆叶片的光合作用产生了一定的抑制,且这种抑制在大豆5叶期表现较初荚期明显.此外,3个大豆品种对铝毒的反应存在一定的基因型差异.

关键词: 铝胁迫, 大豆, 光合特性

Abstract: With three soybean (Glycine max) varieties Zhechun No.2,Zhechun No.3 and 9703 as test materials,this paper studied the effects of different aluminum(Al)concentration on their photosynthetic characters.The results showed that the leaf chlorophyll content decreased by 5%～35% when Al concentration increased.Al also affected various physiological functions,e.g.,stomatal resistance increased by 10%～35%,stomatal conductance decreased by 10%～40%,photosynthetic and transpiration rate decreased by 5%～40% and 20%～50%,respectively,and water utilization efficiency decreased by 15%～50%.Al stress could inhibit the photosynthesis of soybean leaves,and the inhibition was more serious in vegetative than in reproductive growth period.In addition,three test soybean varieties had definite genetic difference in response to Al toxicity.

Key words: Aluminum, Soybean, Photosynthetic character

中图分类号:

Q945.11

应小芳, 刘鹏. 铝胁迫对大豆叶片光合特性的影响[J]. 应用生态学报, 2005, 16(1): 166-170.

YING Xiaofang, LIU Peng . Effects of aluminum stress on photosynthetic characters of soybean [J]. Chinese Journal of Applied Ecology, 2005, 16(1): 166-170.

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