草业学报2012，Vol.21Issue(1)：118-125,8.
苏打碱胁迫对多年生黑麦草的生理影响
Effects of saline sodic stress on growth and physiological responses of Lolium perenne
摘要
Abstract
The effects of saline sodic stress on growth and physiological responses of perennial ryegrass (Lolium perenne) were investigated in a greenhouse hydroponics experiment. Relative transpiration rate, shoot height, root length, water content, chlorophyll content, malondiadehyde (MDA) content were measured together with the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) of perennial ryegrass seedlings treated with one of five pH levels [6. 5 (The control), 8. 2, 9. 1, 9. 9, and 10. 9 mixture of 0. 1 mol/L Na2CO3, NaHCO3] and distilled water. As pH values increased, relative transpiration rate, shoot height, root length, water content, and chlorophyll content were significantly reduced compared with the control, while the ratio of root to shoot initially increased but then decreased. MDA contents increased (from 7. 0 nmol/g FW to 30.0 nmol/g FW) with an increase of pH. At pH = 9. 1, SOD activity was the highest (8. 4 U/mg protein). CAT activity was highest (118. 5 U/min · g protein) at pH = 6. 5 and then declined at higher pH values. POD was lowest at pH = 6. 5 but increased as pH values increased.关键词
多年生黑麦草/苏打碱胁迫/生长状况/抗氧化酶Key words
perennial ryegrass {Lolium perenne)/ saline sodic stress/ growth/ antioxidant enzyme分类
农业科技引用本文复制引用
郭慧娟,胡涛,傅金民..苏打碱胁迫对多年生黑麦草的生理影响[J].草业学报,2012,21(1):118-125,8.基金项目
公益性行业(农业)科研专项经费项目(200903001-2-4)资助. （农业）
