Ectomycorrhizal communities in a productive Tuber aestivum Vittad. orchard: composition, host influence and species replacement
Ectomycorrhizal communities in a productive Tuber aestivum Vittad. orchard: composition, host influence and species replacement
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DOI：
10.1111/j.1574-6941.2010.01039.x
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发表时间：
2011-04-01
影响因子：
4.2
通讯作者：
Di Massimo, Gabriella
中科院分区：
文献类型：
--
作者：
Benucci, Gian Maria Niccolo;Raggi, Lorenzo;Di Massimo, Gabriella
松露（块菌属）和其他外生菌根物种在野生和栽培生态系统中形成物种丰富的组合。我们的目的是调查生长在 24 年树龄块茎果园中的榛树和角树的外生菌根群落。我们证明外生菌根群落包括许多物种并且在系统发育上具有多样性。鉴定出二十九个外生菌根类群。小麦块茎外生菌根丰富（9.3%），只有头皮口蘑的外生菌根含量更高（21.4%），并且在两种植物共生体中均检测到，两种不同宿主之间的分布和丰度存在差异。 Thelephoraceae 科是最多样化的，有 12 个类群。观察到的总体多样性占通过丰富度折刀估计确定的潜在多样性的 85%，并且榛树的多样性显着高于角树。角树的外生菌根群落在系统发育上密切相关，而榛树的外生菌根群落没有观察到明确的分布模式。一致的位点特征表明外生菌根关系是宿主介导的，但不是宿主特异性的。尽管不同植物物种拥有不同的外生菌根群落，并且不同地点的普通小麦丰度也不同，但子实体的生产没有检测到差异。
Truffles (Tuber spp.) and other ectomycorrhizal species form species-rich assemblages in the wild as well as in cultivated ecosystems. We aimed to investigate the ectomycorrhizal communities of hazels and hornbeams that are growing in a 24-year-old Tuber aestivum orchard. We demonstrated that the ectomycorrhizal communities included numerous species and were phylogenetically diverse. Twenty-nine ectomycorrhizal taxa were identified. Tuber aestivum ectomycorrhizae were abundant (9.3%), only those of Tricholoma scalpturatum were more so (21.4%), and were detected in both plant symbionts with a variation in distribution and abundance between the two different hosts. The Thelephoraceae family was the most diverse, being represented by 12 taxa. The overall observed diversity represented 85% of the potential one as determined by a jackknife estimation of richness and was significantly higher in hazel than in hornbeam. The ectomycorrhizal communities of hornbeam trees were closely related phylogenetically, whereas no clear distribution pattern was observed for the communities in hazel. Uniform site characteristics indicated that ectomycorrhizal relationships were host mediated, but not host specific. Despite the fact that different plant species hosted diverse ectomycorrhizal communities and that the abundance of T. aestivum differed among sites, no difference was detected in the production of fruiting bodies.