How Pathogens Affect Root Structure

Quentin, Michaël; Hewezi, Tarek; Damiani, Isabelle; Abad, Pierre; Baum, Thomas J.; Favery, Bruno

doi:10.1002/9781118447093.ch10

Root Genomics and Soil Interactions 2012

DOI: 10.1002/9781118447093.ch10

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How Pathogens Affect Root Structure

Michaël Quentin

Tarek Hewezi

Isabelle Damiani

et al.

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2015

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References 169 publications

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“…These results are in accordance to the absence of phenotype in LBD16 loss-of-function plants infected with Heterodera spp 7 regardless of other auxin-regulated genes induced in syncytia (for a review see refs. 3,14). Similar results were obtained for the genes co-regulated negatively with LBD16, as they were found mainly down-regulated in galls and GCs while they showed a significant up-regulation in the CNs feeding sites (Table S2).…”

supporting

confidence: 81%

Genes co-regulated withLBD16in nematode feeding sites inferred fromin silicoanalysis show similarities to regulatory circuits mediated by the auxin/cytokinin balance in Arabidopsis

Cabrera

Fenoll

Escobar

2015

Plant Signaling & Behavior

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Plant endoparasitic nematodes, root-knot and cyst nematodes (RKNs and CNs) induce within the root vascular cylinder transfer cells used for nourishing, termed giant cells (GCs) and syncytia. Understanding the molecular mechanisms behind this process is essential to develop tools for nematode control. Based on the crucial role in gall development of LBD16, also a key component of the auxin pathway leading to the divisions in the xylem pole pericycle during lateral root (LR) formation, we investigated genes co-regulated with LBD16 in different transcriptomes and analyzed their similarities and differences with those of RKNs and CNs feeding sites (FS). This analysis confirmed LBD16 and its co-regulated genes, integrated in signaling cascades mediated by auxins during LR and callus formation, as a particular feature of RKN-FS distinct to CNs. However, LBD16, and its positively co-regulated genes, were repressed in syncytia, suggesting a selective down- regulation of the LBD16 auxin mediated pathways in CNs-FS. Interestingly, cytokinin-induced genes are enriched in syncytia and we encountered similarities between the transcriptome of shoot regeneration from callus, modulated by cytokinins, and that of syncytia. These findings establish differences in the regulatory networks leading to both FS formation, probably modulated by the auxin/cytokinin balance.

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supporting

confidence: 81%

Genes co-regulated withLBD16in nematode feeding sites inferred fromin silicoanalysis show similarities to regulatory circuits mediated by the auxin/cytokinin balance in Arabidopsis

Cabrera

Fenoll

Escobar

2015

Plant Signaling & Behavior

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How Pathogens Affect Root Structure

Cited by 1 publication

References 169 publications

Genes co-regulated withLBD16in nematode feeding sites inferred fromin silicoanalysis show similarities to regulatory circuits mediated by the auxin/cytokinin balance in Arabidopsis

Genes co-regulated withLBD16in nematode feeding sites inferred fromin silicoanalysis show similarities to regulatory circuits mediated by the auxin/cytokinin balance in Arabidopsis

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