枯萎菌诱导对棉花细胞壁氨基酸含量的影响

Effect of Inoculation Fusarium oxysporum f. sp. vasinfectum on Con-tent of Amino Acids im Cell Wall of Cotton

用不同致病力的棉花枯萎菌（Ｆｔｔｓａｒｉｕｍｏｘｙｓｐｏｒｕｍｆ．ｓｐｖａｓｉｎｆｅｃｔｕｍ）７号和３号小种接种棉花，对抗、感品种根部细胞壁氨基酸含量进行分析。结果表明，感病品种在接种７号小种后，根内细胞壁氨基酸含量增加了３２．３％，抗病品种增加了４，４％；接种３号小种后抗病品种氨基酸含量下降了１４％，感病品种上升了１９．８％。感病品种受枯萎菌诱导后细胞壁氨基酸的积累明显高于抗病品种，为枯萎菌的生长提供了较多的氮源，易与枯萎菌建立寄生关系，认为细胞壁氨基酸含量与棉花对枯萎病的抗性具有一定相关性。

Analysis content of an1ino acids in cotton root ce11 wall of resistant and stisceptiblecultivars infected by Fusarium oxysporum f.sp. vasinfectum(F.O.V)race 7 and race3, theresults showed that content of root cell wall in suscep一tible and resistant cultivars increased32.3%and 4.4%respectively after inoculation race 7;After inoculation race 3 content ofamino acid,decreased 14%in resistant cultivar, increased 19.8%in susceptible cultivar. Ac-cumalation ofamino acids in cell wall induced by F.O. V in susceptible cultivar was higher thanit was in resistant cultivar,and provided more nitrogen application for pathogen growth,re-sulted in susceptible and appearance parasitic relation.These results suggested that content ofamino acids in cell wall was correlated with resistance to Fusarium wilt。