Blocking intruders : inducible physico-chemical barriers against plant vascular wilt pathogens
Kashyap, Anurag (Centre de Recerca en Agrigenòmica)
Planas-Marquès, Marc (Centre de Recerca en Agrigenòmica)
Capellades, Montserrat (Centre de Recerca en Agrigenòmica)
Valls, Marc (Centre de Recerca en Agrigenòmica)
Sánchez Coll, Núria (Centre de Recerca en Agrigenòmica)

Date:	2021
Abstract:	Xylem vascular wilt pathogens cause devastating diseases in plants. Proliferation of these pathogens in the xylem causes massive disruption of water and mineral transport, resulting in severe wilting and death of the infected plants. Upon reaching the xylem vascular tissue, these pathogens multiply profusely, spreading vertically within the xylem sap, and horizontally between vessels and to the surrounding tissues. Plant resistance to these pathogens is very complex. One of the most effective defense responses in resistant plants is the formation of physico-chemical barriers in the xylem tissue. Vertical spread within the vessel lumen is restricted by structural barriers, namely, tyloses and gels. Horizontal spread to the apoplast and surrounding healthy vessels and tissues is prevented by vascular coating of the colonized vessels with lignin and suberin. Both vertical and horizontal barriers compartmentalize the pathogen at the infection site and contribute to their elimination. Induction of these defenses are tightly coordinated, both temporally and spatially, to avoid detrimental consequences such as cavitation and embolism. We discuss current knowledge on mechanisms underlying plant-inducible structural barriers against major xylem-colonizing pathogens. This knowledge may be applied to engineer metabolic pathways of vascular coating compounds in specific cells, to produce plants resistant towards xylem colonizers.
Grants:	Ministerio de Economía y Competitividad AGL2016-78002-R Ministerio de Economía y Competitividad RyC 2014-16158 Agencia Estatal de Investigación PID2019-105416RB-I00 Ministerio de Economía y Competitividad SEV-2015-0533
Note:	Altres ajuts: CERCA Programme/Generalitat de Catalunya
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Gels ; Inducible defenses ; Lignin ; Physico-chemical barriers ; Plant-pathogen interactions ; Structural defenses ; Suberin ; Tyloses ; Vascular pathogens ; Wilt
Published in:	Journal of experimental botany, Vol. 72, Issue 2 (February 2021) , p. 184-198, ISSN 1460-2431

DOI: 10.1093/jxb/eraa444
PMID: 32976552

15 p, 819.9 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
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