氟化氢对植物叶片中SOD酶活力和MDA含量的影响

EFFECT OF HF ON ACTIVITY OF SUPEROXIDE DISMUTASE AND CONCENTRATION OF MDA IN PLANTS

本文研究了浓度为０．０４１ｍｇ／ｍ￣３，０．０８３ｍｇ／ｍ￣３和０．１６６ｍｇ／ｍ￣３的ＨＦ气体分别对小麦、玉米和蚕豆三种植物熏气后，植物叶片中ＳＯＤ酶活力的变化及膜脂过氧化产物ＭＤＡ含量的变化，实验结果表明高深度ＨＦ（０．１６６ｍｇ／ｍ￣３）对ＳＯＤ有抵制作用，较低浓度（０．０８３ｍｇ／ｍ￣３，０．０４１ｍｇ／ｍ￣３）下是先升后抑。在三种浓度下，叶片中ＭＤＡ含量均随熏气时间的延长而增加。三种植物对氟化氢的敏感性不同，由大到小依次为蚕豆、小麦、玉米。

The seedlings of spring wheat,maize and broan were exposed to different concentrationof HF(0.041 mg/m￣3,0.083 mg/m￣3,0.166 mg/m￣3).The superoxide dismutase activity was in-hibited at higher concentration of HF( 0.1 66mg/m￣3),at lower concentration the SOD activitywas stimulated at first and then decreased later.With the stretch of fumigation time, the contantof MDA in all plants increased.The sensitivity of three kinds of plants to HF were different(broad bean>spring wheat>maize).