双重麻烦：晚疫病和早疫病病原体对马铃薯的双重感染,Plant Pathology

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双重麻烦：晚疫病和早疫病病原体对马铃薯的双重感染
Plant Pathology ( IF 2.3 ) Pub Date : 2023-05-23 , DOI: 10.1111/ppa.13759
S. M. Brouwer ₁ , P. J. Wolters ₂ , E. Andreasson ₁ , E. Liljeroth ₁ , V. G. A. A. Vleeshouwers ₂ , L. J. Grenville‐Briggs ₁

Affiliation

全球马铃薯生产受到多种病原体的困扰，其中马铃薯晚疫病和早疫病的病原体分别是致病疫霉和晚疫病菌。这两种病原体具有不同的生活方式，并且都是马铃薯的成功病原体，但是尽管观察到这两种病原体在田间条件下同时感染马铃薯，但迄今为止对马铃薯和这两种病原体之间的三方相互作用知之甚少。在这里我们研究了A的相互作用。索拉尼和P . 致病菌首先在体外进行试验，随后在实验室和现场环境中进行植物试验。我们发现A . 索拉尼可以抑制P . 致病菌的体外生长以及实验室实验和农业相关田间环境中马铃薯的感染。A. _ 茄病菌对P .具有直接抑制作用。体外致病菌和致病菌分泌的化合物。solani对P . 的孢子囊和菌丝体具有抑制和破坏作用。体外致病菌。植物感染生物测定表明，同时联合接种两种病原体会导致比单次接种更大的坏死病灶；然而，连续接种只会导致更大的病变A. _ P后接种solani。马铃薯病菌。这些结果表明，这些病原体尝试定殖马铃薯的顺序对于疾病结果很重要，并且在设计马铃薯等作物的未来疾病控制策略时应考虑植物病原体彼此之间的影响。

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Double trouble: Co-infection of potato with the causal agents of late and early blight

Global potato production is plagued by multiple pathogens, amongst which are Phytophthora infestans and Alternaria solani, the causal agents of potato late blight and early blight, respectively. Both these pathogens have different lifestyles and are successful pathogens of potato, but despite observations of both pathogens infecting potato simultaneously in field conditions, the tripartite interactions between potato and these two pathogens are so far poorly understood. Here we studied the interaction of A. solani and P. infestans first in vitro and subsequently in planta both in laboratory and field settings. We found that A. solani can inhibit P. infestans in terms of growth in vitro and also infection of potato in both laboratory experiments and in an agriculturally relevant field setting. A. solani had a direct inhibitory effect on P. infestans in vitro and compounds secreted by A. solani had both an inhibitory and disruptive effect on sporangia and mycelium of P. infestans in vitro. In planta infection bioassays revealed that simultaneous co-inoculation of both pathogens resulted in larger necrotic lesions than single inoculations; however, consecutive inoculations only resulted in larger lesions when A. solani was inoculated after P. infestans. These results indicate that the order in which these pathogens attempt to colonize potato is important for the disease outcome and that the influence of plant pathogens on each other should be accounted for in the design of future disease control strategies in crops such as potato.

更新日期：2023-05-23

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