叶片组织电阻的动态变化与蔬菜对γ射线抗性的相关研究

本文研究了两种蔬菜在γ射线的作用下叶片组织电阻和离子外渗电导率的变化。结果表明 :①γ射线对植株造成的辐射损伤首先表现在叶片上 ,叶片是植株对电离辐射比较敏感的部位 ;②叶片组织电阻动态变化曲线的峰值幅度与叶片抗γ射线辐射的能力相对应 ,对γ射线抗性强的叶片 ,其峰值的幅度也高 ,曲线峰值的高低可作为衡量和预测蔬菜对γ射线抗性强弱的指标 ;③与离子外渗电导法相比 ,叶片组织电阻法可以灵敏地反映出同一植株上、下部叶片之间对γ射线抗性的差异 ;④从叶片组织电阻和叶片离子外渗的动态曲线可以定量地确定蔬菜的致死剂量。

EFFECTS OF γ-RAYS ON VEGETABLE LEAF AND LEAF TISSUE RESISTANCE

The change of the leaf tissue resistance and ion exosmosis of two kinds of vegetables by γ\|rays were studied and the apparent characters were observed.The results showed as follows.The effect of γ\|rays on vegetable firstly appears on leaf and the leaf is the sensitive part to γ\|rays.The peak value of leaf tissue resistance changes paralleled to the ability of resistance to γ\|rays,the higher the resistant ability is,the higher the peak value of the leaf tissue resistance will be.The peak value of leaf tissue resistance can be used as the index of the ability of vegetable resistance to γ\|rays.Contrast with ion exosmosis,leaf tissue resistance showed different resistant abilities to γ\|rays with different leaves of the same plant.The death dose of vegetable can be determined,With the change of leaf tissue resistance and ion exosmosis.