Study on the Relationship Between the Toxin of Phytophthora infestans （Mont.） de Bary and Resistance of Potato

• Published in: Agricultural sciences in China Vol. 10; no. 2; pp. 238 - 245
• Main Author: YANG Yan-li XIAO Lang-tao HU Xian-qi
• Format: Journal Article
• Language: English
• Published: 2011
• Subjects: 寄主植物; 植物病原真菌; 液体介质; 病菌感染; 硫酸铵沉淀; 霉菌毒素; 马铃薯品种; 马铃薯晚疫病菌
• ISSN: 1671-2927

Plant pathogenic fungi produce mycotoxins which may lead host plants to produce disease symptoms and may have a significant positive role in the course of disease development.The putative Phytophthora infestans toxins were prepared by culturing in liquid medium（60 g rye and 10% tomato juice L-1） for 1 mon at 17℃,filtering through four layers of cheesecloth and being precipitated by ammonium sulfate.The resulted putative toxin solutions were used to study the effects on 3 potato varieties（both leaf and tuber tissues）.The results show that potato leaves and tubers exhibit symptoms similar to the late blight resulted from P.infestans infection.Potato varieties reacting differentially to both the toxin dilutions and toxins produced by different P.infestans isolates suggested the presence of toxin-mediated specificities between potato and P.infestans.Potato leaf and tuber tissues have different and contrary reactions to the toxin.Toxin-mediated specificities are likely present between potato and P.infestans.