Large scale transcriptome analysis reveals interplay between development of forest trees and a beneficial mycorrhiza helper bacterium

BMC Genomics
Florence KurthMika T Tarkka

Abstract

Pedunculate oak, Quercus robur is an abundant forest tree species that hosts a large and diverse community of beneficial ectomycorrhizal fungi (EMFs), whereby ectomycorrhiza (EM) formation is stimulated by mycorrhiza helper bacteria such as Streptomyces sp. AcH 505. Oaks typically grow rhythmically, with alternating root flushes (RFs) and shoot flushes (SFs). We explored the poorly understood mechanisms by which oaks integrate signals induced by their beneficial microbes and endogenous rhythmic growth at the level of gene expression. To this end, we compared transcript profiles of oak microcuttings at RF and SF during interactions with AcH 505 alone and in combination with the basidiomycetous EMF Piloderma croceum. The local root and distal leaf responses to the microorganisms differed substantially. More genes involved in the recognition of bacteria and fungi, defence and cell wall remodelling related transcription factors (TFs) were differentially expressed in the roots than in the leaves of oaks. In addition, interaction with AcH 505 and P. croceum affected the expression of a higher number of genes during SF than during RF, including AcH 505 elicited defence response, which was attenuated by co-inoculation with P. croceum i...Continue Reading

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Citations

Sep 18, 2016·Applied Microbiology and Biotechnology·Stephanie WernerNicole Brinkmann
Aug 17, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yi ShiHuiling Ma
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Feb 16, 2020·BMC Genomics·Nourolah SoltaniKimberly Gwinn

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Datasets Mentioned

BETA
PRJNA280092

Methods Mentioned

BETA
RNA-Seq
Illumina sequencing

Software Mentioned

Bioconductor
REST
Relative Expression Software Tool [ REST
Blast2GO
RSEM
GOseq
Bowtie
blastx
Bioconductor package

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