Reduction of rare soil microbes modifies plant-herbivore interactions
Reduction of rare soil microbes modifies plant-herbivore interactions
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DOI：
10.1111/j.1461-0248.2009.01424.x
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发表时间：
2010-03-01
期刊：
影响因子：
8.8
通讯作者：
van der Putten, Wim H.
中科院分区：
文献类型：
--
作者：
Hol, W. H. Gera;de Boer, Wietse;van der Putten, Wim H.
P>稀有物种被认为对群落相互作用和生态系统过程影响很小。然而，很少有研究真正尝试量化稀有物种在生态系统中的作用。在这里，我们比较了土壤群落组合对植物-草食动物相互作用的影响，并表明稀有土壤微生物的减少可以增加植物生物量和植物营养质量。生长在稀有微生物减少的土壤中的两种农作物物种具有更高营养质量的组织，这从理论上讲使它们更容易受到食芽蚜虫和食根线虫等害虫生物的影响。在没有线虫的情况下，减少稀有微生物会增加蚜虫的体型；线虫总是会减小蚜虫的体型，与土壤微生物群落无关。这项研究首次表明稀有土壤微生物并非多余，而是可能通过增强地上和地下植物防御而在作物保护中发挥作用。这些是否是稀有土壤微生物对植物和食草动物的直接影响，还是通过微生物土壤群落组合的变化而产生的间接影响，还有待测试。
P>Rare species are assumed to have little impact on community interactions and ecosystem processes. However, very few studies have actually attempted to quantify the role of rare species in ecosystems. Here we compare effects of soil community assemblages on plant-herbivore interactions and show that reduction of rare soil microbes increases both plant biomass and plant nutritional quality. Two crop plant species growing in soil where rare microbes were reduced, had tissues of higher nutritional quality, which theoretically makes them more susceptible to pest organisms such as shoot-feeding aphids and root-feeding nematodes. Reduction of rare microbes increased aphid body size in the absence of nematodes; nematodes always reduced aphid body size independent of the soil microbial community. This study is the first to show that rare soil microbes are not redundant but may play a role in crop protection by enhancing aboveground and belowground plant defence. It remains to be tested whether these are direct effects of rare soil microbes on plants and herbivores, or indirect effects via shifts in the microbial soil community assemblages.