NDLI: Impacts of root symbiotic associations on interspecific variation in sugar exudation rates and rhizosphere microbial communities: a comparison among four plant families

Content Provider	Springer Nature Link
Author	Okubo, Atushi Matsusaka, Motomu Sugiyama, Shuichi
Copyright Year	2015
Abstract	Symbiotic associations between rhizobia and arbuscular mycorrhyzal fungi (AMF) influence changes in carbon allocation to plant roots and alter the exudation of signal molecules in their host plants. In this study, we examined the impacts of bacterial and fungal symbiotic associations on the variation in sugar exudation rates from plant roots, and in rhizosphere microbial community structure, by comparing four plant families (e.g., Asteraceae, Brassicaceae, Fabaceae, and Poaceae) with different bacterial and fungal symbiotic associations.We determined sugar exudation rates of 23 plant species by regressions of exuded sugars against root mass through periodic samplings of plants grown in pots. Banding patterns from PCR-DGGE analyses of 28 plant species were evaluated by ordination scores relative to their rhizosphere bacterial and fungal community structures. Plant family was the most important source of variation in sugar exudation rates and microbial community structure between plant species. Brassicaceae, which lacks a root symbiotic association, had the lowest sugar exudation rate, the lowest rhizosphere microbial mass, and a distinct fungal community structure relative to the other plant families. Fabaceae had a different bacterial community structure relative to the other plant families.These results demonstrate that root symbiotic associations have great impacts on the rate of sugar exudation and free-living microbial communities that inhabit the rhizosphere.
Starting Page	345
Ending Page	356
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	399
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-10-13
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bacterial community Fungal community Interspecific comparison Rhizosphere Root symbiotic association Sugar exudation rate Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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