摘要
本文研究了烟草抗病品种(Burley21)和感病品种(NC82)在烟草低头黑病菌毒素诱导下,丙二醛(malondialdehyde,MDA)含量及超氧化物歧化酶(SOD)、过氧化物酶(POD)、多酚氧化酶(PPO)活性的动态变化。结果表明,在毒素的诱导下,MDA含量的增减比率抗病品种Burley21低于感病品种NC82。不论Burley21还是NC82,SOD、POD和PPO活性皆在前期表现为上升后期下降,但抗病品种较感病品种下降速度慢,而且POD在后期还表现为高活性。表明抗病品种(Burley21)具有比感病品种(NC82)更强的防御能力和抗膜脂过氧化能力。
The dynamic changes of malondialdehyde (MDA) content and superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) activities induced by Colletotrichum capsici f. nico-tianae toxin on tobacco were studied. The activities of SOD,POD and PPO in both resistant cultivar (Bur-ley21) and susceptible cultivar(NC82)increased in the early stage after treatment,and decreased in the late period. However,the resistant cultivar Burley21 showed a higher level of SOD, POD and PPO activities and a lower changing rate of MDA content than those in the susceptible cultivar NC82. Moreover, the activities of three tested enzymes in Burley21 also declined more slowly in the late time after inoculation. It demonstrated that Burley21 possessed stronger protective potential and was more resistant to membrane lipid peroxidation.
出处
《植物病理学报》
CAS
CSCD
北大核心
2004年第1期27-31,共5页
Acta Phytopathologica Sinica
