Host and non-host roots in rice: cellular and molecular approaches reveal differential responses to arbuscular mycorrhizal fungi

Frontiers in Plant Science
Valentina FiorilliPaola Bonfante

Abstract

Oryza sativa, a model plant for Arbuscular Mycorrhizal (AM) symbiosis, has both host and non-host roots. Large lateral (LLR) and fine lateral (FLR) roots display opposite responses: LLR support AM colonization, but FLR do not. Our research aimed to study the molecular, morphological and physiological aspects related to the non-host behavior of FLR. RNA-seq analysis revealed that LLR and FLR displayed divergent expression profiles, including changes in many metabolic pathways. Compared with LLR, FLR showed down-regulation of genes instrumental for AM establishment and gibberellin signaling, and a higher expression of nutrient transporters. Consistent with the transcriptomic data, FLR had higher phosphorus content. Light and electron microscopy demonstrated that, surprisingly, in the Selenio cultivar, FLR have a two-layered cortex, which is theoretically compatible with AM colonization. According to RNA-seq, a gibberellin inhibitor treatment increased anticlinal divisions leading to a higher number of cortex cells in FLR. We propose that some of the differentially regulated genes that lead to the anatomical and physiological properties of the two root types also function as genetic factors regulating fungal colonization. The rice...Continue Reading

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Citations

May 6, 2016·Frontiers in Plant Science·Jasmin Manck-Götzenberger, Natalia Requena
May 19, 2017·The New Phytologist·Heike LehnertFrank Ordon
Jan 9, 2018·Journal of Experimental Botany·Luisa LanfrancoPaola Bonfante
Dec 22, 2017·The Plant Journal : for Cell and Molecular Biology·Jonathan M Plett, Francis M Martin
Feb 16, 2019·DNA Research : an International Journal for Rapid Publication of Reports on Genes and Genomes·Leandro Costa NascimentoMarcelo F Carazzolle
Feb 23, 2019·Scientific Reports·Camille Fonouni-FardeFlorian Frugier
Feb 20, 2019·Nature Communications·Jian You WangSalim Al-Babili
Jun 30, 2019·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Pushplata Prasad SinghAlok Adholeya
Aug 29, 2019·Frontiers in Microbiology·Raffaella BalestriniIsabella Pentimone
Aug 30, 2018·Frontiers in Plant Science·Luciano AvioCristiana Sbrana
Feb 10, 2018·Plant & Cell Physiology·Priya Pimprikar, Caroline Gutjahr
Oct 16, 2019·Frontiers in Plant Science·Valentina FiorilliSalim Al-Babili
Dec 2, 2020·The Plant Journal : for Cell and Molecular Biology·Juan C MorenoSalim Al-Babili
May 22, 2021·Science·Mélanie K RichPierre-Marc Delaux
May 21, 2021·Plant Physiology·Ji-Yun KimMichael M Wudick

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Methods Mentioned

BETA
RNA-seq
PCR
transmission electron microscopy
RNAseq
electron microscopy

Software Mentioned

Bowtie
Illumina Genome Analyser
custom R
DESeq Bioconductor
R package DESeq
MapMan
Cutadapt
Tophat
DESeq R package
DESeq

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