【摘 要】
：
大豆灰斑病菌(Cercospora aojina)在大豆叶葡萄糖琼脂培养基上的生长速率较在PDA上快86％,在小白菜琼脂和番茄琼脂培养基上的产孢量分别约为PDA的8倍和6倍。此菌的生长发育温度
【机 构】
：
东北农学院,东北农学院,东北农学院
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大豆灰斑病菌(Cercospora aojina)在大豆叶葡萄糖琼脂培养基上的生长速率较在PDA上快86％,在小白菜琼脂和番茄琼脂培养基上的产孢量分别约为PDA的8倍和6倍。此菌的生长发育温度最适为25—28℃,低于15℃或高于35℃均不适宜。黑暗条件较为有利。在pH4—9之间,均能生长和产孢,但以pH5生长最适,pH6—7产孢量最多。分生孢子在蒸馏水里亦萌发得很好,半小时就能萌发,经3—4小时后萌发率显著上升,5小时萌发率达90％以上。在10—40℃之间均能萌发,最适温度为28—30℃。以pH7萌发最好。黑暗条件有利萌发,阳光直射对孢子萌发有明显的抑制作用。
The growth rate of Cercospora sojae on soybean leaf glucose agar was 86% faster than that on PDA, and the sporulation on Brassica campestris and tomato agar was about 8 times and about 6 times of PDA respectively Times The growth and development of this strain of the most suitable temperature 25-28 ℃, less than 15 ℃ or higher than 35 ℃ are not appropriate. Dark conditions are more favorable. At pH4-9, growth and sporulation could both be carried out. However, the optimum pH was pH5 and the sporulation rate was the highest at pH6-7. Conidia also germinate well in distilled water and germinate in half an hour. The germination rate increases significantly after 3-4 hours and the germination rate reaches 90% after 5 hours. Germination at 10-40 ℃, the optimum temperature is 28-30 ℃. The best germination at pH7. Dark conditions conducive to germination, direct sunlight on spore germination was significantly inhibited.
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