【摘要】 链格孢属(Alternaria)真菌是农作物的主要致病菌之一,它能引起包括玉米、小麦、烟草、马铃薯、番茄、苹果、梨等几十种农作物发病.其发病机理主要是由病菌的代谢产物———毒素导致的.由于毒素的作用使农作物产生各种症状,如黑斑病、褐斑病、茎枯病、赤星病等等,严重影响了农作物的产量,给我国农业生产带来了巨大损失.更多还原

【Abstract】 Alternaira is one of the mainly germs which can have illness coming on dozens of kinds of crops, such as, wheat, tobacco, potato, apple, pear, etc. The supersession result toxin of the germ mainly causes its pathogenesis. This toxin makes the crops produce various kinds of symptoms, for instance black rot , foxiness disease , withered ill , red star of stem ,etc. All of the influence output of the crops seriously, brings enormous loss to agricultural production of our country.更多还原