低温胁迫对大叶相思和马占相思某些生理特性的影响  

Effects of Low Temperature Stress on Some Physiological Changes of Acacia auriculaeformis and A. mangium

作　　者：孙清鹏[1] 许煌灿[1] 张方秋[1] 尹光天[1] 张玉福 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520 [2]山东省成武县康集乡初级中学,山东成武274200

出　　处：《林业科学研究》2002年第1期34-40,共7页Forest Research

基　　金："九五"国家攻关"相思优良纸浆材用材林选育和培育技术研究"专题 (96 0 110 10 5 )

摘　　要：低温处理后 ,大叶相思和马占相思叶片中可溶性糖含量、可溶性蛋白质和游离脯氨酸含量均发生明显变化。低温处理过程中超氧化物歧化酶 (SOD)活性先降低后增加 ,而膜脂过氧化的主要产物丙二醛 (MDA)则随温度的降低而呈现出先增加后减少 ,然后再增加的趋势。外源脱落酸 (ABA)预处理可显著提高马占相思的抗寒力。试验结果表明 ,以 10 - 4mol·L- 1外源ABA预处理 2 4h或 10 - 5mol·L- 1外源ABA预处理Under low temperature stress, the contents of the soluble sugar, the soluble protein and the free proline changed significantly. And there are significant correlation between them and the treatment temperature. The specific activity of SOD decreased at first and then increased in the whole. The content of MDA firstly increased, then decreased, and finally increased again. The cold resistance of seedlings of A. mangium was increased by pretreatment with abscisic acid. The result showed that the pretreatment of either 10 -4 mol·L -1 ABA for 24 hours or 10 -5 mol·L -1 ABA for 36 hours was the optimum treatments to improve plant cold resistance.

关 键 词：低温胁迫 可溶性糖 蛋白质 脯氨酸 超氧化物歧化酶 丙二醛 脱落酸 大叶相思 马占相思 

分 类 号：S792.990.1[农业科学—林木遗传育种]