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

Please always quote using this URN: urn:nbn:de:bvb:20-opus-118247
  • 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 CLV3pIntricate 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.show moreshow less

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Metadaten
Author: Muhammad Naseem, Mugdha Srivastava, Thomas DandekarORCiD
URN:urn:nbn:de:bvb:20-opus-118247
Document Type:Journal article
Faculties:Fakultät für Biologie / Theodor-Boveri-Institut für Biowissenschaften
Language:English
Parent Title (English):Frontiers in Plant Science
ISSN:1664-462X
Year of Completion:2014
Volume:5
Pagenumber:588
Source:Frontiers in Plant Science 5:588. doi:10.3389/fpls.2014.00588
DOI:https://doi.org/10.3389/fpls.2014.00588
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 571 Physiologie und verwandte Themen
Tag:CLAVATA3; FLS2 receptor; auxin; cytokinins; stem cell niche
Release Date:2015/10/02
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung