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糖与殖物病害的假说是美国著名殖物病理学家霍斯弗(J·G·Horsfall)提出的。认为有些植物病害属低糖病害,如由ALternariasolani引起的番茄早疫病,Fusariumlgcoprisici引起的番茄枯萎病,稻瘟病及许多白粉病等均属低糖病害,即植株局部组织含糖量减少时,病害即可表现。番茄早疫病的发病情况说明了这个问题。病害多从底部老叶发病,幼叶发病少见,因老化叶片,糖分减少,不能满足病菌生长发育的需要。病菌为了生存,而需要糖,所以就分泌果胶酶和纤维素分解酶来破坏细胞上的组织,从果胶、纤维素的长链中获
The hypothesis of sugar and colon disease is proposed by the famous American colon pathologist GW Gorsfall. It is considered that some plant diseases are low sugar diseases, such as the early blight of tomato caused by ALternariasolani, the Fusarium lgcoprisici caused tomato blight, rice blast and many powdery mildew and so on, all belong to the low sugar disease, that is, when the sugar content of the local plant tissue is reduced, the disease can be manifested . The incidence of tomato early blight illustrates this problem. Diseases mostly from the bottom of the old leaves of disease, rare young leaves due to aging leaves, reducing sugar, can not meet the needs of the growth and development of germs. Germs require sugar in order to survive, so they secrete pectinase and cellulolytic enzymes to destroy the tissue on the cells. From the long chains of pectin and cellulose,