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分别用大黄素、大黄酚、大黄酸及槲皮素等对植物病原真菌细链格孢、盘多毛孢、栗盘色多隔孢、香石竹单孢锈等菌的产孢数量、菌丝生命活力、菌落产生孢子盘及孢子萌发等进行实验， 发现上述天然产物对上述病原真菌均有显著的抑制作用． 这一发现将对真菌的生理生化研究以及进一步寻找高效、低毒、无公害杀菌剂提供了理论依据．
Respectively with emodin, chrysophanol, rhein and quercetin phytopathogenic fungi such as Alternaria alternata, Pasteurella multocida, Chestrella multi-spore, Carnation single spore rust spores, such as the number of spores, mycelium life Vitality, colony sporulation and spore germination experiment conducted and found that the above natural products on the pathogenic fungi were significantly inhibited. This discovery will provide a theoretical basis for the physiological and biochemical research of fungi and further search for high efficiency, low toxicity and pollution-free bactericide.