镉胁迫对小麦幼苗生长及生理特性的影响

Effects of cadmium stress on the growth and physiological characteristics of wheat seedlings

主要研究了重金属Cd污染对小麦生长和部分生理特性的影响。结果表明,叶绿素含量在0 2 5mmol·L-1Cd处理浓度时达到峰值,随Cd浓度的增加,含量下降。超氧化物歧化酶(SOD)、过氧化物酶(POD)活性随Cd浓度的增加而增加。丙二醛含量和细胞膜透性同样呈上升趋势。根系活力表现为先升高后下降的变化趋势。Cd胁迫下,小麦的生长受到一定程度的抑制,并随溶液中Cd浓度的增加。

Effects of Cd on growth and some physiological characteristics of wheat seedling were studied.The results showed that the content of chlorophyll was up to the high point at 0.25 mg·L -1 of Cd concentration in the solution and decreased afterwards.The activities of SOD and POD,MDA content and permeability of membrane increased with the increasing Cd concentration.The root activity increased first and decreased afterwards.The growth of wheat was inhibited under Cd stress.The higher the concentration of Cd in solution was the more serious the inhibition was.