Entomosporium mespili appears to be a hemibiotroph on infected Photinia leaves. This fungal pathogen produced distinctive haustoria in living host cells in young lesions. Each haustorium possessed a long slender neck with a single septum and an enlarged distal body that contained a single nucleus. A collar of host cell wall material was associated with the haustorial neck. Intact haustoria also were found in necrotic cells of older lesions. However, by this stage of disease development, the pathogen also possessed an extensive system of branched, septate hyphae that grew indiscriminately between and through dead and dying host cells. These hyphae eventually gave rise to a subcutaneous layer of sporogenous cells that formed conidia.

中文翻译：

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Photinia昆虫孢子叶斑病宿主-病原体关系的超微结构

Entomosporium mespili 似乎是受感染的 Photinia 叶子上的半生物营养物。这种真菌病原体在年轻病变的活宿主细胞中产生独特的吸器。每个吸器都有一个细长的颈部，带有一个隔膜和一个包含单个核的扩大的远端体。宿主细胞壁材料的项圈与吸器颈相连。在旧病灶的坏死细胞中也发现了完整的吸器。然而，在疾病发展的这个阶段，病原体还拥有广泛的分枝、有隔菌丝系统，它们在死亡和垂死的宿主细胞之间和通过它们不分青红皂白地生长。这些菌丝最终在皮下形成一层孢子细胞，形成分生孢子。