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禾谷丝核菌的生长温度范围为2.5—34℃,适宜生长温度为15—28℃,最适为23℃,在37℃温度下停止生长,40℃温度持续19个小时,大部菌核不能萌发出菌丝.60℃热水浸菌核30分钟,65℃热水浸10分钟可杀死全部菌核.在-20℃温度下冰冻306天,病菌仍能存活.病菌在黑暗条件下菌丝生长速度最快,散光下生长速度虽然稍慢,但其气生菌丝十分发达.在培养皿中,太阳光照射4小时(最大光强70,000勒克司)可杀死大部分菌核和菌丝.碘钨灯(1000瓦)照射28小时不能杀死菌核.上午11点半到下午3点半的4个小时内的太阳直射和较小角度的斜射光可杀死菌核,其余时间的太阳光不能杀死菌核.用30瓦紫外光灯照射相距20厘米,平放在水琼脂平面上的菌核180分钟可杀死16.7%,紫外光对菌丝的生长有明显地抑制作用.禾谷丝核菌(Rhizoctonia cerealis Vander Hoeven)是小麦株腐病的病原菌,是我国近几年来分离和鉴定的小麦上新病原菌.对于该病原的生物学尚缺少研究资料,作者于1982—1985年进行了此项研究,现将生物学研究的第二部分——温度和光照对禾谷丝核菌生长的影响报导于后.
Rhizoctonia cerealis has a growth temperature range of 2.5-34 ℃, suitable growth temperature of 15-28 ℃, optimal temperature of 23 ℃, growth stopped at 37 ℃, temperature of 40 ℃ for 19 hours, most of the sclerotia Can not sprout mycelium.60 ℃ hot water soaking bacteria nucleus for 30 minutes, 65 ℃ hot water immersion for 10 minutes to kill all sclerotia. Frozen 306 days at -20 ℃, the bacteria can still survive. Bacteria in dark conditions Mycelium grew most rapidly, although the growth rate astigmatism slightly slower, but its aerial mycelium is very developed in the dish, the sun 4 hours (maximum light intensity 70,000 lux) can kill most of the sclerotia and Mycelium. Iodine tungsten lamp (1000 W) irradiation 28 hours can not kill the sclerotia. 11:30 to 15:30 in the direct sunlight within 4 hours and a small angle of oblique light can kill sclerotia, the rest Time of sunlight can not kill the sclerotia with 30 watts of UV light irradiation 20 centimeters apart, flat on the water agar plane sclerotia 180 minutes to kill 16.7%, UV light on mycelial growth was significantly inhibited Role Rhizoctonia cerealis (Rhizoctonia cerealis) Vander Hoeven is the pathogen of wheat rot, is China’s isolation and identification in recent years The new pathogen in wheat.For the biology of the pathogen is still lack of research data, the author conducted this study in 1982-1985, now the second part of biological research - temperature and light on the growth of Rhizoctonia cerealis Impact reported later.