Leaf endophytes of manuka (Leptospermum scoparium)
Leaf endophytes of manuka (Leptospermum scoparium)
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麦卢卡叶内生菌（Leptospermum scoparium）
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
P. Johnston
中科院分区：
文献类型：
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作者：
P. Johnston
对麦卢卡天然更新林和人工林叶片内生真菌的多样性和频率进行了调查。一个有限的和特征范围的物种被隔离的所有网站，虽然天然和种植的立场之间的显着差异。在自然林分中，Phyllosticta种是单一的优势内生菌。这种真菌似乎是宿主种特异性的，因为它不是从密切相关的kanuka（Kunzea ericoides）在混合，均匀年龄的立场，麦卢卡和kanuka分离。叶点霉在林分中的出现频率在单株之间波动较大。没有明显的环境或其他梯度可以解释这种斑块状分布。叶点霉属，沿着的两个最常见的物种在天然林，Diploceras leptospermi和一个身份不明的腔肠菌，是缺席的大部分采样的种植林，并在非常低的频率时，本。虽然有几个人工林接近天然林，而且已经建立了好几年，但它们之间的差异一直保持着。种植林中最常见的内生菌是葡萄座菌属和链格孢属。这些物种，发现在自然林低水平，很可能是“机会主义”内生菌。它们可能也是附生真菌的特征，只侵入处于胁迫下的植物的活叶。麦卢卡种植和天然林分之间的叶内生菌群落的差异可能是各自的立场，微生物群落的更广泛的差异的指示，并可能证明现场恢复项目的重要性。这些项目使用苗圃饲养的麦卢卡植物作为先锋物种，可能会在建立后的很长一段时间内建立缺乏麦卢卡社区自然多样性的林分。
The diversity and frequency of leaf endophytic fungi occurring in naturally regenerating and planted stands of manuka were investigated at several sites. A restricted and characteristic range of species was isolated from all sites, although marked differences were noted between natural and planted stands. In natural stands a Phyllosticta species was the single dominant endophyte. This fungus appears to be host species specific, as it was not isolated from the closely related kanuka (Kunzea ericoides) in mixed, even-aged stands of manuka and kanuka. The frequency of the Phyllosticta sp. fluctuated greatly between individual trees across single stands. No obvious environmental or other gradients were recognized which could explain this patchy distribution. The Phyllosticta sp., along with the two next most common species in natural stands, Diploceras leptospermi and an unidentified coelomycete, were absent from most of the planted stands sampled, and at very low frequencies when present. Although several of the planted stands were close to natural stands and had been established for several years, the difference between them has been maintained. The most common endophytes in planted stands were Botryosphaeria and Alternaria spp. These species, found at low levels in natural stands, are likely to be ‘opportunistic’ endophytes. They are probably also characteristic of the epiphytic mycota, invading only the living leaves of plants under stress. The difference in leaf endophyte communities between planted and natural stands of manuka may be an indication of wider differences in the microbial communities of the respective stands, and could prove significant for site restoration projects. Such projects using nursery-raised manuka plants as a pioneer species may be establishing stands lacking much of the natural diversity of manuka communities for extended periods following establishment.