Effect of wounding or infection by Phytophthora infestans on the contents of terpenoids in potato tubers

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概要

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• Inoculation of the potato cut surfaces with an incompatible race of Phytophthora infestans induced an accumulation of rishitin, but only a trace occurred when infected by a compatible race. When the tuber was cut, a large amount of steroid-glycoalkaloids (solanine) accumulated in the cut surface tissue, although only a trace was found in intact tissue. Only a small amount of solanine, if any, was contained in the wound periderm tissue. Most of the solanine seemed to be distributed in tissue neighbouring the newly formed meristematic tissue zone. Distribution of solanine as a function of distance from the cut surface was exponential. Infection of the cut surface by an in-compatible race of Phytophthora infestans reduced the accumulation of solanine. The higher the concentration of zoospore used, the less the solanine content. It has been reported that the higher the concentration of zoospores used for inoculation of the cut surface, the less the number of renewed meristematic cells in the wound tissue. In experiments using fresh and aged tubers, a good correlation between the number of renewed meristematic cells and solanine content was found. The accumulation of solanine in the wound tissue and its reduction due to infection by an incompatible race may be related to renewed meristematic cells formation and its reduction caused by the infection. No drastic change in carotenoids or sterol contents was found 2 days after cutting or inoculation, when the tubers were cut, or cut and then infected by the incompatible race.

• 日本植物生理学会の論文

著者

• TOMIYAMA KOHEI

  Hokkaido Agricultural Experiment Station

• ISHIZAKA NOBUYUKI

  Hokkaido Agricultural Experiment Station

• Tomiyama Kohei

  Hokkaido National Agricultural Experiment Station:(present)plant Pathology Laboratorv Faculty Of Agr

• Ishizaka Nobuyuki

  Hokkaido National Agricultural Experiment Station

関連論文

• PHENOL METABOLISM IN RELATION TO DISEASE RESISTANCE OF POTATO TUBER I. ACTIVTIES OF PHENOL OXIDASE AND SOME ENZYMES RELATED TO GLYCOLYSIS AS AFFECTED BY CHLOROGENIC ACID TREATMENT
• Biological activities of rishitin, an antifungal compound isolated from diseased potato tubers, and its derivatives
• PHENOL METABOLISM IN RELATION TO DISEASE RESISTANCE OF POTATO TUBER II. EXPONENTIAL EQUATION RELATING LEVELS OF PHENOLS OR PHENOLIC ENZYMES TO DISTANCE FROM LOCUS OF INJURY OF PLANT TISSUE
• The influence of a pre-infectional heat treatment on the resistance of potato plant to Phytophthora infestans. : (Cell Physiological studies on resistance of potato plants to Phytophthora infestans. VIII)
• Effect of wounding or infection by Phytophthora infestans on the contents of terpenoids in potato tubers
• The Structure and Synthesis of Rishitinol. A Sesquiterpene Alcohol from Diseased Potato Tubers
• Rishitin. I. The isolation and structure elucidation.

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