小麦赤霉菌分生孢子产生方法的初步研究

 1.一般赤霉菌在不同培养基上产生的分生孢子较少,但经阳光照射后,其在马铃薯琼脂培养基上产生极多。
2.阳光照射能促进小麦赤霉菌产生大量的分生孢子(每毫升2080万),开培养皿盖照射较关盖照射产生分生孢子的数量稍多,照射时间也缩短一倍以上。赤霉菌经阳光连续照射后,可以不断产生较多的分生孢子。
3.不同光线对赤霉菌产生分生孢子的效用各异。紫外线、日光灯能使其产生分子孢子,红外线和可见光无作用,其中紫外线照射距离17公分,关培养皿盖照射4小时,产生分生孢子最多。
4.赤霉菌经紫外线照射后,温度、湿度、氧气对其产生分生孢子的形态和数量有一定的影响,在处理后3小时就可以形成新的分生孢子。

A METHOD OF CONIDIAL PRODUCTION OF FUSARIUM GRAMINEARUM SCHW

1.Fusazium graminearum Schw.Gibberella zeae(Schw) Perch]produ-ced only scanty conidia on various culture media tested,except on pota-to dextrose agar under sunlight,in which an abundant amount of coni-dia was produced.2.It was observed that a greater amount of spores was produced inPetri dish cultures with covers removed during exposure to sunlight thanin those cultures with covers on.3.Ultra-violet light and Neon light showed effects on amount andmorphology of the spores,while infra-red light and diffuse sunlight show-ed no such effects.The most abundant sporulation was obtained withcultures irradiated at 17cm under ultraviolet for 4 hrs.4.Temperature,moisture and oxygen were also shown to have someeffect on amount and shape of spores after irradiation with ultra-violetlight.1.Fusazium graminearum Schw.Gibberella zeae(Schw) Perch] produced only scanty conidia on various culture media tested,except on potato dextrose agar under sunlight,in which an abundant amount of conidia was produced.
2.It was observed that a greater amount of spores was produced in Petri dish cultures with covers removed during exposure to sunlight than in those cultures with covers on.
3.Ultra-violet light and Neon light showed effects on amount and morphology of the spores,while infra-red light and diffuse sunlight showed no such effects.The most abundant sporulation was obtained with cultures irradiated at 17cm under ultraviolet for 4 hrs.
4.Temperature,moisture and oxygen were also shown to have some effect on amount and shape of spores after irradiation with ultra-violet light.