摘要
对芒果进行水分干旱胁迫处理 .结果表明 ,水分胁迫使芒果幼叶的相对含水量 RWC( relative water content)和叶水势 ΨT 下降 .芒果幼叶的超氧离子 O- 2.产生速率随水分胁迫处理强度加大而增加 .丙二醛 MDA( malondialdehyde)含量的变化趋势与 O- 2.产生速率的变化趋势相似 ,超氧歧化酶 SOD( superoxide dismutace) ,过氧化物酶 POD( peroxidase)和过氧化氢酶 CAT( catalase)的活性水平也与 O- 2.的变化相一致 ,细胞相对质膜透性加大 .说明芒果幼叶的水分胁迫损伤 ,是由 O- 2.引发的膜脂过氧化 ,致使 MDA含量增加 。
The leaves of mango (Mangifera indica L.) of seedlings were treated with different water stress for our studying on the mechanism of cell injury.The results showed thatthe relative watercontentand waterpotential decreased with the increase in water stress.The rate of superoxides free radical generation increased with the increase in water stress.The water stress strength was in direst proportion to the amountof O- 2. generation.The trend of change in MDA contents was similar to that in O- 2 . generation rate.It can be concluded that the cell damage of leaves in water stress is caused by membrane lipid peroxidation first,meanwhile,increase in MDA content,and cytoplas- mic system destruction.
出处
《生命科学研究》
CAS
CSCD
2000年第1期60-64,共5页
Life Science Research
基金
福建省教委科研基金!资助项目(K92020
JB99007)
关键词
水分胁迫
幼叶
芒果
抗旱育种
细胞活性氧
water stress
superoxide free radical
membrane lipid peroxidation
malon-dialdehyde
superoxide dismutase
Mangif era indica L
