The similarity between arbuscular mycorrhizal fungi communities of trees and nearby herbs in a planted forest exhibited within-site spatial variation patterns explained by local soil conditions.
Akotchiffor Kevin Geoffroy Djotan, Norihisa Matsushita, Yosuke Matsuda, Kenji Fukuda
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引用次数: 0
Abstract
The similarity between the arbuscular mycorrhizal fungi (AMF) communities of trees and neighboring understory herbs in forests remains unclear, which we aimed to clarify. We traced and collected basal roots of 20 randomly chosen Cryptomeria japonica (Cupresaceae) trees and the surrounding soil at four microsites in 1 km2 of a Cr. japonica forest. One Chloranthus serratus (Chlorantaceae) herb immediately at the base of each sampled tree was excavated to collect an intact root system. We amplified a partial small subunit of fungal ribosomal DNA (18S) using Illumina MiSeq amplicon sequencing. Soil physicochemical properties were also measured. We detected 670 and 679 AMF operational taxonomic units (OTUs) in Cr. japonica and Ch. serratus, respectively, belonging to Acaulospora, Dominikia, Glomus, Microkamienskia, Rhizophagus, Septoglomus, and Sclerocystis. Seventeen OTUs were detected in the roots of both host species at average relative abundances > 1%. Among them, four dominant OTUs with an average relative abundance > 10% were concurrently detected in the roots of 17 tree-herb sets. The composition and similarity of their AMF communities were spatially varied, significantly driven by spatially varying soil pH, total C, N, C/N, and elevation, but not electroconductivity, supported by the microsite-dependent distributions of their dominant OTUs. We concluded that the similarity of AMF communities between trees and neighboring understory herbs depends on the soil physicochemical conditions that influence the distribution of their dominant AMF.
期刊介绍:
Mycorrhiza is an international journal devoted to research into mycorrhizas - the widest symbioses in nature, involving plants and a range of soil fungi world-wide. The scope of Mycorrhiza covers all aspects of research into mycorrhizas, including molecular biology of the plants and fungi, fungal systematics, development and structure of mycorrhizas, and effects on plant physiology, productivity, reproduction and disease resistance. The scope also includes interactions between mycorrhizal fungi and other soil organisms and effects of mycorrhizas on plant biodiversity and ecosystem structure.
Mycorrhiza contains original papers, short notes and review articles, along with commentaries and news items. It forms a platform for new concepts and discussions, and is a basis for a truly international forum of mycorrhizologists from all over the world.