Two mycoheterotrophic orchids from Thailand tropical dipterocarpacean forests associate with a broad diversity of ectomycorrhizal fungi.
Two mycoheterotrophic orchids from Thailand tropical dipterocarpacean forests associate with a broad diversity of ectomycorrhizal fungi.
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DOI：
10.1186/1741-7007-7-51
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发表时间：
2009-08-14
期刊：
影响因子：
5.4
通讯作者：
Selosse MA
中科院分区：
文献类型：
--
作者：
Roy M;Watthana S;Stier A;Richard F;Vessabutr S;Selosse MA
真菌异养植物被认为与真菌有着非常特异的联系。在温带地区，真菌异养兰花大多与外生菌根真菌共生，在热带地区则与腐殖菌或寄生菌共生。虽然大多数真菌异养兰花发生在热带地区，很少有研究致力于他们，迄今为止，他们的特异性的主要结论是从他们的协会与外生菌根真菌在温带地区。我们调查了三个亚洲Neottieae种外生菌根森林在泰国。我们发现，所有这些都与外生菌根真菌有关，如Thelephoraceae，Russulaceae和Sebacinales。基于其生物量的13 C富集，它们可能从这些真菌中获得有机碳，就像温带地区的真菌异养Neottieae一样。此外，13 C富集表明附近的一些绿色兰花也从真菌中获得了部分碳。然而，三种兰花中的两种呈现出真菌异养植物的独特特征：它们与真菌的狭窄分支没有特别的联系。一些兰花个体甚至与多达九种不同的真菌有关。我们的研究结果表明，一些绿色和真菌异养兰花在热带地区可以接受碳从外生菌根真菌，从而从树木。我们的研究结果表明，在热带地区的两个mycoheterotrophic兰花真菌协会的特异性的情况下，在大多数以前的研究mycoheterotrophic植物，主要集中在温带兰花。
Mycoheterotrophic plants are considered to associate very specifically with fungi. Mycoheterotrophic orchids are mostly associated with ectomycorrhizal fungi in temperate regions, or with saprobes or parasites in tropical regions. Although most mycoheterotrophic orchids occur in the tropics, few studies have been devoted to them, and the main conclusions about their specificity have hitherto been drawn from their association with ectomycorrhizal fungi in temperate regions. We investigated three Asiatic Neottieae species from ectomycorrhizal forests in Thailand. We found that all were associated with ectomycorrhizal fungi, such as Thelephoraceae, Russulaceae and Sebacinales. Based on 13C enrichment of their biomass, they probably received their organic carbon from these fungi, as do mycoheterotrophic Neottieae from temperate regions. Moreover, 13C enrichment suggested that some nearby green orchids received part of their carbon from fungi too. Nevertheless, two of the three orchids presented a unique feature for mycoheterotrophic plants: they were not specifically associated with a narrow clade of fungi. Some orchid individuals were even associated with up to nine different fungi. Our results demonstrate that some green and mycoheterotrophic orchids in tropical regions can receive carbon from ectomycorrhizal fungi, and thus from trees. Our results reveal the absence of specificity in two mycoheterotrophic orchid-fungus associations in tropical regions, in contrast to most previous studies of mycoheterotrophic plants, which have been mainly focused on temperate orchids.
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DOI：
10.1098/rspb.2004.2807
发表时间：
2004-09-07
影响因子：
4.7
作者：
Bidartondo, MI;Burghardt, B;Read, DJ
通讯作者：
Read, DJ
影响因子：
2.8
作者：
Arnold, A. Elizabeth;Henk, Daniel A.;Vilgalys, Rvtas
通讯作者：
Vilgalys, Rvtas
影响因子：
9.4
作者：
Gebauer, G;Meyer, M
通讯作者：
Meyer, M
DOI：
10.1139/b06-101
发表时间：
2006-09-01
期刊：
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
影响因子：
--
作者：
Abadie, Jean-Claude;Puttsepp, Ulle;Selosse, Marc-Andre
通讯作者：
Selosse, Marc-Andre
影响因子：
4.9
作者：
Bidartondo, Martin I.;Read, David J.
通讯作者：
Read, David J.