模拟酸雨对3种红豆杉幼苗生理指标的影响

Effects of Simulated Acid Rain on Physiological Indexes of Three Species of Taxus Seedlings

以东北红豆杉(Taxus cuspidata)、南方红豆杉(T.chinensis var.mairei)、西藏红豆杉(T.wallichiana)的2年生幼苗为试验材料,在不同pH值模拟酸雨胁迫下,研究模拟酸雨对3种红豆杉属植物叶片的各项生理指标的影响。结果表明:(1)经过不同pH值模拟酸雨胁迫后,西藏红豆杉对模拟酸雨的抗性最强,东北红豆杉次之,南方红豆杉抗性最弱;(2)以pH值3.0酸雨胁迫对东北红豆杉、南方红豆杉和西藏红豆杉各生理指标影响最大,而东北红豆杉和南方红豆杉对pH值4.5酸雨胁迫的抗性最好,西藏红豆杉对pH值4.0酸雨胁迫的抗性最好。

Taxus cuspidata,T.chinensis var.mairei,and T.wallichiana seedlings were used as experimental materials to study the effects of different pH values on the physiological indexes of the leaves of these three Taxus plants under simulated acid rain stress.The results showed that:(1)After the acid rain stress was simulated by different pH values,T.wallichiana had the strongest resistance to simulated acid rain,followed by T.cuspidata and T.chinensis var.mairei;(2)The acid rain stress with pH 3.0 had the greatest influence on the physiological indexes of T.cuspidata,T.chinensis var.mairei and T.wallichiana,while T.cuspidata and T.chinensis var.mairei had the best resistance to acid rain stress of pH 4.5,T.wallichiana had the best resistance to acid rain stress of pH 4.0.