【摘要】 马蹄金褐色叶斑病菌(Pyrenophora dichondrae sp.nov.)在PDA上生长和产孢最好,菌丝生长和产孢的适温为25～28℃,适宜pH5～7,全黑暗促进产孢,全光照促进菌丝生长。对碳源的利用以葡萄糖最好,麦芽糖最差;对氮源的利用以硝酸钙最好,氯化铵最差。孢子萌发的最适温度为20～28℃,最适相对湿度为90%～100%,最适pH6～8,最适于孢子萌发的碳源为葡萄糖,氮源是硝酸钠。子囊孢子致死温度是49℃。更多还原

【Abstract】 For the growth and ascospore formation of Pyrenophora dichondrae sp.nov.,the best medium was PDA,the optimum temperature was 25～28 ℃ and the optimum pH was 5～7.Complete darkness promoted ascospore formation and complete illumination promoted hypha growth.The pathogen could make use of many kinds of carbohydrates,and dextrose seemed to be the best C source,while malt sugar the poorest.Calcium nitrate was the best N source,while ammonium chloride was the poorest.For ascospore germination of the pathogen,the optimum temperature and relative humidity(RH) were 20～28 ℃ and 90%～100% respectively.The optimum pH for ascospore germination was in the range of 6～8.For ascospore germination of the pathogen,the best C source was dextrose and N source was sodium nitrate.The thermal death point of the ascospore was 49 ℃.更多还原