摘要
以冷季型草坪草匍匐翦股颖(Agrostis stolonifera L.)L-93为材料,在人工气候箱内对L-93进行短期(9 d)高温、干旱以及高温干旱复合胁迫处理,研究不同胁迫处理对叶片相对含水量(RWC)、相对电导率(EL)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)活性以及丙二醛(MDA)含量的影响。结果表明,在不同胁迫处理下,L-93叶片SOD活性均出现先上升后下降的趋势;POD、CAT和APX活性随处理时间的延长而降低。双重胁迫对植株抗氧化酶系统造成的伤害最为严重,短时间内造成植物体内MDA含量与EL值的迅速上升。
The experiment was designed to investigate drought, heat and combined stresses (9 days, short term )on coolseason turf grass Agrostis stolonifera‘L-93’ by analyzing leaf relative water content ( RWC ) , malondialdehyde(MDA),electrolyte leakage (EL) and activity of four anti-oxidant enzymes.Transient increases in superoxide dismutase (SOD) anddecreases in catalase (CAT), peroxidase (POD) and ascrobate peroxidase (APX) occurred in drought, heat and combinedstress. It took the shortest time for the drought- heat combined stress to cause the damage on creeping bentgrass with quickincrease in both malondialdehyde content and the electrolyte leakage.
出处
《山东农业大学学报(自然科学版)》
CSCD
北大核心
2014年第4期489-494,共6页
Journal of Shandong Agricultural University:Natural Science Edition
关键词
抗氧化酶系统
匍匐翦股颖
双重胁迫
高温
干旱
Anti-oxidant enzymes
creeping bentgrass
combined stresses
heat-drought