CABI Bioscience, Bakeham Lane, Egham, Surrey TW20 9TY, UK.
Mycologia. 2002 Mar-Apr;94(2):210-20.
Endophytic fungi were isolated from living symptomless leaves of 12 tree species from two locations in the Iwokrama Forest Reserve, Guyana. Sixty-four fungal morphotaxa were characterized from 2492 cultures, which were derived from a total of 2520 sample units. Species of Colletotrichum, Nodulisporium, Pestalotiopsis and Phomopsis were most frequently isolated. Colonization was greater in samples from the midrib than in those from laminar tissue, and slightly greater at the tip of the lamina compared with the base of the leaf. In contrast to studies in temperate ecosystems, no distinct fungal communities were identified for individual plant species, suggesting that the degree of host preference is low. The implications for estimation of fungal diversity in tropical systems are explored.
从圭亚那伊沃克拉马森林保护区的两个地点的 12 种无症状活树叶中分离出内生真菌。从 2492 株培养物中鉴定出 64 种真菌形态分类群，这些培养物源自总共 2520 个样本单位。炭疽菌属、节菱孢属、拟盘多毛孢属和拟茎点霉属的物种最常被分离出来。中脉样本的定植率高于叶肉组织样本，叶尖样本的定植率略高于叶基部样本。与温带生态系统的研究不同，没有为单个植物物种确定明显的真菌群落，这表明宿主偏好程度较低。探讨了这一结果对热带系统中真菌多样性估计的影响。
