氟化氢胁迫对大戟科苗木叶绿素荧光特性及电导率的影响研究

Effects of Hydrogen Fluoride Stress on Chlorophyll Fluorescence Characteristics and Conductance of Euphorbiaceae Tree Species

氟化氢通过植物叶片气孔进入细胞内,进而影响植物的生理特性。为了研究氟化氢气体对5种大戟科树种2 a生营养袋苗生理的影响,利用熏气方式模拟大气氟化氢污染,测定了叶片的叶绿素荧光参数和细胞膜透性并进行综合评价,结果表明:5种大戟科树种在熏气过程中均受到伤害,各项指标均不同程度的变化,其中秋枫(Bischofia javanica)的相对电导率与对照相比升高了468.75%;综合评价得出5种大戟科树种抗氟化氢能力大小排序为千年桐(Vernicia montana)(0.82)>黄桐(Endospermum chinense)(0.46)>秋枫(0.40)>血桐(Macaranga tanarius)(0.32)>白楸(Mallotus paniculatus)(0.27),在空气中氟化氢污染较为严重的区域种植大戟科乡土树种应优先选择千年桐和黄桐等。

The physiological characteristics of plants as well as an environmental aspect determined their capacities to resist and absorb hydrogen fluoride. In order to study the effects of hydrogen fluoride on the physiology of five species of Euphorbiacea seedlings, the fumigation method was used to simulate hydrogen fluoride contamination in the atmosphere, and comprehensively evaluated chlorophyll fluorescence parameters and cell membrane permeability. The results showed that five native Euphorbiaceae tree species were damaged in fumigation, and all indicators had a certain degree of change, and the conductivity of Bischofia javanica increased by 468.75%. According to the comprehensive evaluation, the order for the hydrogen fluoride resistant capacity was Vernicia montana（0.82）〉 Endospermum chinense（0.46） 〉Bischofia javanica（0.40）〉 Macaranga tanarius（0.32）〉 Mallotus paniculatus（0.27）. The results of the study can provide the reference to the selection of landscape plants in polluted area. It showed that in the area that contaminated by hydrogen fluoride seriously, the Vernicia montana and Endospermum chinense should be the preferred option for landscape plant.