Short-term parasite-infection alters already the biomass, activity and functional diversity of soil microbial communities.
Short-term parasite-infection alters already the biomass, activity and functional diversity of soil microbial communities.
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短期寄生虫感染已经改变了土壤微生物群落的生物量、活性和功能多样性
DOI：
10.1038/srep06895
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发表时间：
2014-11-04
影响因子：
4.6
通讯作者：
Li MH
中科院分区：
文献类型：
--
作者：
Li JM;Jin ZX;Hagedorn F;Li MH
原生寄生植物可用于感染和控制入侵植物。以入侵植物薇甘菊（Mikania micrantha）和本地植物薏苡（Coix lacryma）为材料，在本地土壤上建立了微生态系统。采用4种不同强度的菟丝子（Cuscuta campestris）侵染薇甘菊7周，研究了寄生对土壤微生物群落生物量和功能多样性的自上而下影响。寄生显著降低根系生物量，改变土壤微生物群落。在两个较高的感染水平下，土壤微生物生物量下降，但土壤呼吸增加，表明土壤微生物代谢活性的强烈刺激（+180%）。此外，Biolog分析表明，感染导致土壤微生物群落功能多样性指数发生显着变化。Pearson相关分析表明，随着根系生物量的减少，微生物生物量显著下降，尤其是入侵植物M。薇甘菊土壤微生物群落功能多样性指数与土壤微生物生物量呈正相关。因此，7周的植物寄生对土壤微生物群落生物量、活性和功能多样性的负面影响很可能是由于入侵M的根系生物量和根系分泌物减少造成的。薇甘菊
Native parasitic plants may be used to infect and control invasive plants. We established microcosms with invasiveMikania micranthaand nativeCoix lacryma-jobigrowing in mixture on native soils, withM. micranthabeing infected by parasiticCuscuta campestrisat four intensity levels for seven weeks to estimate the top-down effects of plant parasitism on the biomass and functional diversity of soil microbial communities. Parasitism significantly decreased root biomass and altered soil microbial communities. Soil microbial biomass decreased, but soil respiration increased at the two higher infection levels, indicating a strong stimulation of soil microbial metabolic activity (+180%). Moreover, a Biolog assay showed that the infection resulted in a significant change in the functional diversity indices of soil microbial communities. Pearson correlation analysis indicated that microbial biomass declined significantly with decreasing root biomass, particularly of the invasiveM. micrantha. Also, the functional diversity indices of soil microbial communities were positively correlated with soil microbial biomass. Therefore, the negative effects on the biomass, activity and functional diversity of soil microbial community by the seven week long plant parasitism was very likely caused by decreased root biomass and root exudation of the invasiveM. micrantha.
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影响因子：
3.7
作者：
Li J;Jin Z;Song W
通讯作者：
Song W
影响因子：
9.7
作者：
Kourtev, PS;Ehrenfeld, JG;Häggblom, M
通讯作者：
Häggblom, M
影响因子：
64.8
作者：
Bardgett, RD;Smith, RS;Hobbs, PJ
通讯作者：
Hobbs, PJ
影响因子：
4.8
作者：
Bardgett, RD;Wardle, DA
通讯作者：
Wardle, DA
影响因子：
4.9
作者：
Niu, Hong-Bang;Liu, Wan-Xue;Liu, Bo
通讯作者：
Liu, Bo