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作 者 ：靳月华 陶大立 杜英君

期 刊 ：林业科学 1988年 24卷 4期 页码：385-392

关键词：红松；

摘 要 ：为支持红松苗越冬伤害是一种光氧化伤害的新假说,本文提供了下述实验证据:1.全光苗在高光强下释放CO₂与吸收O_2相偶合,且不能被光呼吸抑制剂所抑制,这表明释放的CO₂不是来自光呼吸。2.全光苗针叶含有较高的不饱和脂肪酸过氧化物,而其叶绿体类囊体膜所含脂肪酸的不饱和度较低。3.对针叶起保护作用的SOD酶活性全光苗低于遮荫苗,一年生针叶低于二年生针叶,其同工酶谱在大树针叶上显示两条带而在幼苗针叶上只显示一条带。4.作为单线态氧猝灭剂的类胡萝卜素的含量也表现出遮荫苗高于全光苗,3月份尤为明显。

Abstract:To report the hypothesis that irreversible winter injury of Korean pine (Pinus koraiensis Sieb.et Zucc.) seedlings is caused by photooxidation,the following experimental evidences are provided:1.The CO₂ release of exposed seedling needles under strong PFD is coupled with O₂ absorption and it can not be inhibited by photorespiration inhibitor NaHSO₃,indicating the released CO₂ comes from photooxidation rather than photorespiration.2.Exposed seedling needles contain more product of lipid peroxidation and their thylakoid membranes have lower fattyacid unsaturation.3.The SOD activity in exposed needles is lower than that in shaded needles.4.The SOD activity in 1-year needles is lower than that in 2-year needles.5.Needles from adult trees have an second band of SOD is ozyme may provide an extra protection mechanism.

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