摘要
为了阐明黑麦对铝毒害的抵御机理,研究了铝胁迫对黑麦幼苗活性氧系统的影响。结果表明,在铝胁迫条件下,黑麦幼苗根伸长生长受到抑制,且随A l3+浓度的增加,抑制程度加重;根尖和叶片的超氧阴离子(O2-)产生速率、H2O2和丙二醛(M DA)含量均随A l3+浓度的增加呈现先增后降的趋势;根和叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性、可溶性蛋白含量增加,有助于将活性氧控制在一定浓度范围内,可有效地避免活性氧伤害。
To elaborate A1 resistant mechanisms, effects of aluminum （A1） on membrane lipid peroxidation, reactive oxygen contents and protective enzyme activities of rye were studied. Superoxide radical （O2^-） formation rate and MDA content,which had the highest values at 50μmol·L^-1, increased under Al stress. Root and leaf H2O2 contents increased under Al stress, with the highest value occurring at 50μmol·L^-1 for leaves, and at 25μmol·L^-1 for roots. Compared with the controls, the activities of SOD, POD and CAT, and soluble protein contents in rye roots and leaves increased. It was one of possible mechanisms for Al-toxicity tolerance of rye to keep reactive oxygen concentration at some range and avoid reactive oxygen damage.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2005年第6期91-95,共5页
Journal of Triticeae Crops
基金
国家自然科学基金资助项目(30360048)
关键词
黑麦
铝胁迫
活性氧
耐铝性
抗氧化酶
Rye
Aluminum stress
Reactive oxygen
Aluminum tolerance
Antioxidant enzyme
