Soil temperature modifies effects of soil biota on plant growth
Soil temperature modifies effects of soil biota on plant growth
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DOI：
10.1093/jpe/rtw097
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发表时间：
2017-10-01
影响因子：
2.7
通讯作者：
Joshi, Jasmin
中科院分区：
文献类型：
--
作者：
Heinze, Johannes;Gensch, Sabine;Joshi, Jasmin
植物与土壤中的许多生物和非生物组分直接或间接地相互作用。目前的研究主要集中在非生物或生物因子对植物生长的直接影响上，而非生物土壤因子对植物生长的间接影响研究较少。因此，我们调查了非生物土壤条件如何影响植物的性能，通过变化引起的土壤biota.MethodsIn一个全因子实验，我们生长广泛的草鸭茅无论是有或没有土壤生物群，并调查土壤温度，肥力和水分对土壤生物群对植物生长的影响。我们测量了生物量的生产，根性状和定植丛枝菌根真菌以及微生物呼吸。重要的FindingsWe发现显着的非生物土壤条件和土壤生物群之间的相互作用对植物生长的肥力，但特别是土壤温度，作为一个增加10摄氏度显着改变了土壤生物群对植物生长的影响从积极到中性。然而，如果单独测试，土壤温度和肥力本身的增加会对植物生物量产生积极影响，而土壤生物群本身不会影响整体植物生长，但两者都会影响根系结构。通过影响土壤微生物活性和根构型，土壤温度可能会影响植物和土壤生物群之间的互利和致病相互作用。在土壤反馈研究中应考虑这种土壤温度效应，以确保从人工和实验条件到自然环境条件的结果具有更大的可转移性。
AimsPlants directly and indirectly interact with many abiotic and biotic soil components. Research so far mostly focused on direct, individual abiotic or biotic effects on plant growth, but only few studies tested the indirect effects of abiotic soil factors on plant growth. Therefore, we investigated how abiotic soil conditions affect plant performance, via changes induced by soil biota.MethodsIn a full-factorial experiment, we grew the widespread grass Dactylis glomerata either with or without soil biota and investigated the impact of soil temperature, fertility and moisture on the soil biota effects on plant growth. We measured biomass production, root traits and colonization by arbuscular mycorrhizal fungi as well as microbial respiration.Important FindingsWe found significant interaction effects between abiotic soil conditions and soil biota on plant growth for fertility, but especially for soil temperature, as an increase of 10 degrees C significantly changed the soil biota effects on plant growth from positive to neutral. However, if tested individually, an increase in soil temperature and fertility per se positively affected plant biomass production, whereas soil biota per se did not affect overall plant growth, but both influenced root architecture. By affecting soil microbial activity and root architecture, soil temperature might influence both mutualistic and pathogenic interactions between plants and soil biota. Such soil temperature effects should be considered in soil feedback studies to ensure greater transferability of results from artificial and experimental conditions to natural environmental conditions.