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Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection

Intricate mechanisms discriminate between friends and foes in plants. Plant organs deploy overlapping and distinct protection strategies. Despite vulnerability to a plethora of pathogens, the growing tips of plants grow bacteria free. The shoot apical meristem (SAM) is among three stem cells niches,...

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Autores principales: Naseem, Muhammad, Srivastava, Mugdha, Dandekar, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4214217/
https://www.ncbi.nlm.nih.gov/pubmed/25400652
http://dx.doi.org/10.3389/fpls.2014.00588
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author Naseem, Muhammad
Srivastava, Mugdha
Dandekar, Thomas
author_facet Naseem, Muhammad
Srivastava, Mugdha
Dandekar, Thomas
author_sort Naseem, Muhammad
collection PubMed
description Intricate mechanisms discriminate between friends and foes in plants. Plant organs deploy overlapping and distinct protection strategies. Despite vulnerability to a plethora of pathogens, the growing tips of plants grow bacteria free. The shoot apical meristem (SAM) is among three stem cells niches, a self-renewable reservoir for the future organogenesis of leaf, stem, and flowers. How plants safeguard this high value growth target from infections was not known until now. Recent reports find the stem cell secreted 12-amino acid peptide CLV3p (CLAVATA3 peptide) is perceived by FLS2 (FLAGELLIN SENSING 2) receptor and activates the transcription of immunity and defense marker genes. No infection in the SAM of wild type plants and bacterial infection in clv3 and fls2 mutants illustrate this natural protection against infections. Cytokinins (CKs) are enriched in the SAM and regulate meristem activities by their involvement in stem cell signaling networks. Auxin mediates plant susceptibility to pathogen infections while CKs boost plant immunity. Here, in addition to the stem-cell-triggered immunity we also highlight a potential link between CK signaling and CLV3p mediated immune response in the SAM.
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spelling pubmed-42142172014-11-14 Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection Naseem, Muhammad Srivastava, Mugdha Dandekar, Thomas Front Plant Sci Plant Science Intricate mechanisms discriminate between friends and foes in plants. Plant organs deploy overlapping and distinct protection strategies. Despite vulnerability to a plethora of pathogens, the growing tips of plants grow bacteria free. The shoot apical meristem (SAM) is among three stem cells niches, a self-renewable reservoir for the future organogenesis of leaf, stem, and flowers. How plants safeguard this high value growth target from infections was not known until now. Recent reports find the stem cell secreted 12-amino acid peptide CLV3p (CLAVATA3 peptide) is perceived by FLS2 (FLAGELLIN SENSING 2) receptor and activates the transcription of immunity and defense marker genes. No infection in the SAM of wild type plants and bacterial infection in clv3 and fls2 mutants illustrate this natural protection against infections. Cytokinins (CKs) are enriched in the SAM and regulate meristem activities by their involvement in stem cell signaling networks. Auxin mediates plant susceptibility to pathogen infections while CKs boost plant immunity. Here, in addition to the stem-cell-triggered immunity we also highlight a potential link between CK signaling and CLV3p mediated immune response in the SAM. Frontiers Media S.A. 2014-10-30 /pmc/articles/PMC4214217/ /pubmed/25400652 http://dx.doi.org/10.3389/fpls.2014.00588 Text en Copyright © 2014 Naseem, Srivastava and Dandekar. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Naseem, Muhammad
Srivastava, Mugdha
Dandekar, Thomas
Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
title Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
title_full Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
title_fullStr Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
title_full_unstemmed Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
title_short Stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
title_sort stem-cell-triggered immunity safeguards cytokinin enriched plant shoot apexes from pathogen infection
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4214217/
https://www.ncbi.nlm.nih.gov/pubmed/25400652
http://dx.doi.org/10.3389/fpls.2014.00588
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