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soil temperature modifies effects of soil biota on plant growth

Journal of Plant Ecology 2017年第5期10卷 808-821页

作者： Johannes Heinze Sabine Gensch Ewald Weber Jasmin Joshi Department of Biodiversity Research/Botany Institute of Biochemistry and BiologyUniversity of PotsdamMaulbeerallee 1D-14469 PotsdamGermany Berlin-Brandenburg Institute of Advanced Biodiversity Research(BBIB) Altensteinstr.614195 BerlinGermany

Aims Plants directly and indirectly interact with many abiotic and biotic soil *** so far mostly focused on direct,indi-vidual abiotic or biotic effects on plant growth,but only few studies tested the indirect effects of abiotic soil factors on plant ***,we investigated how abiotic soil conditions affect plant performance,via changes induced by soil *** In 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 *** measured biomass production,root traits and colonization by arbuscular mycorrhizal fungi as well as microbial *** Findings We found significant interaction effects between abiotic soil con-ditions and soil biota on plant growth for fertility,but especially for soil temperature,as an increase of 10°c significantly changed the soil biota effects on plant growth from positive to ***,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 *** affecting soil microbial activ-ity and root architecture,soil temperature might influence both mutualistic and pathogenic interactions between plants and soil *** 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.

关键词： plant-soil interaction soil biota abiotic soil factors root traits plant growth

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