Network analysis reveals ecological links between N-fixing bacteria and wood-decaying fungi.
Network analysis reveals ecological links between N-fixing bacteria and wood-decaying fungi.
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DOI：
10.1371/journal.pone.0088141
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Krüger D
中科院分区：
文献类型：
--
作者：
Hoppe B;Kahl T;Karasch P;Wubet T;Bauhus J;Buscot F;Krüger D
枯木中的氮素利用率受到高度限制，与固氮菌的结合被认为能够使木材腐烂真菌满足营养生长和生殖生长的氮素需求。我们利用分子工具对德国常见的温带树种青冈和云杉的枯木中nifH基因的多样性进行了分析。通过将这些基因整合到大量已发表的nifH序列中，并随后对推导出的蛋白质进行系统发育分析，我们验证了与功能性nifH对应的不同池的存在，几乎所有这些池都是科学上新发现的。NifH基因的分布与树种和腐朽级别密切相关，与森林经营无关，而真菌结实率高则与枯枝落叶含氮量降低相关，与nifH多样性呈正相关，尤其是在木材腐烂中期。基于非随机物种共生模式的网络分析揭示了枯木中真菌和固氮菌之间的相互作用，并强烈表明这些分类群之间至少存在共生关系。
Nitrogen availability in dead wood is highly restricted and associations with N-fixing bacteria are thought to enable wood-decaying fungi to meet their nitrogen requirements for vegetative and generative growth. We assessed the diversity of nifH (dinitrogenase reductase) genes in dead wood of the common temperate tree species Fagus sylvatica and Picea abies from differently managed forest plots in Germany using molecular tools. By incorporating these genes into a large compilation of published nifH sequences and subsequent phylogenetic analyses of deduced proteins we verified the presence of diverse pools corresponding to functional nifH, almost all of which are new to science. The distribution of nifH genes strongly correlated with tree species and decay class, but not with forest management, while higher fungal fructification was correlated with decreasing nitrogen content of the dead wood and positively correlated with nifH diversity, especially during the intermediate stage of wood decay. Network analyses based on non-random species co-occurrence patterns revealed interactions among fungi and N-fixing bacteria in the dead wood and strongly indicate the occurrence of at least commensal relationships between these taxa.
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影响因子：
4.8
作者：
De'Ath, G
通讯作者：
De'Ath, G
影响因子：
5.1
作者：
Gaby, John Christian;Buckley, Daniel H.
通讯作者：
Buckley, Daniel H.
DOI：
10.1139/b66-167
发表时间：
1966-01-01
期刊：
CANADIAN JOURNAL OF BOTANY
影响因子：
--
作者：
COWLING, EB;MERRILL, W
通讯作者：
MERRILL, W
影响因子：
3
作者：
Han MV;Zmasek CM
通讯作者：
Zmasek CM
影响因子：
3.8
作者：
Fischer, Markus;Bossdorf, Oliver;Weisser, Wolfgang W.
通讯作者：
Weisser, Wolfgang W.