Tadych Mariusz, Bergen Marshall, Dugan Frank M, White James F
Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901, USA.
Mycol Res. 2007 Apr;111(Pt 4):466-72. doi: 10.1016/j.mycres.2007.02.002. Epub 2007 Feb 20.
Neotyphodium endophytes are asexual, filamentous fungi, mutualistically associated with diverse cool season grasses. Infected seeds and vegetative organs of infected host plants are the only known modes of propagation of the asexual endophytes. In the last decade certain Epichloë and Neotyphodium-infected grass species have been shown to have epiphyllous structures of the endophytes, hyphae, conidiophores, and conidia, growing on leaf blades. The production of epiphyllous conidia suggests the possibility that some of these endophytes may have the ability for plant-to-plant spread. The objective of this study was to determine the possible mechanisms involved in liberation and dispersal of asexual spores of Neotyphodium growing in vitro and epiphyllously on leaves of Poa ampla. Our results indicate that water dispersal is the most likely means of dissemination of conidia of the Neotyphodium sp. Wind generated by dry compressed air does not dislodge the conidia from slide cultures or from P. ampla leaves.
内生真菌新麦角菌是一类无性丝状真菌，与多种冷季型禾本科植物形成共生关系。受感染宿主植物的种子和营养器官是已知的无性内生真菌仅有的传播方式。在过去十年中，已发现某些被香柱菌属和新麦角菌属感染的禾本科植物叶片上存在内生真菌的叶表结构，包括菌丝、分生孢子梗和分生孢子。叶表分生孢子的产生表明这些内生真菌中的一些可能具有从一株植物传播到另一株植物的能力。本研究的目的是确定在体外生长以及在大翦股颖叶片叶表生长的新麦角菌无性孢子释放和传播的可能机制。我们的结果表明，水分传播是新麦角菌分生孢子最可能的传播方式。干燥压缩空气产生的风并不会将分生孢子从玻片培养物或大翦股颖叶片上吹落。
