A phloem-localized Arabidopsis metacaspase (AtMC3) improves drought tolerance

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 239(2023), 4 vom: 20. Aug., Seite 1281-1299
1. Verfasser:	Pitsili, Eugenia (VerfasserIn)
Weitere Verfasser:	Rodriguez-Trevino, Ricardo, Ruiz-Solani, Nerea, Demir, Fatih, Kastanaki, Elizabeth, Dambire, Charlene, de Pedro-Jové, Roger, Vercammen, Dominique, Salguero-Linares, Jose, Hall, Hardy, Mantz, Melissa, Schuler, Martin, Tuominen, Hannele, Van Breusegem, Frank, Valls, Marc, Munné-Bosch, Sergi, Holdsworth, Michael J, Huesgen, Pitter F, Rodriguez-Villalon, Antia, Coll, Nuria S
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2023
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Research Support, Non-U.S. Gov't Arabidopsis thaliana abscisic acid drought hypoxia metacaspases osmotic stress phloem Arabidopsis Proteins mehr... Abscisic Acid 72S9A8J5GW

Beschreibung
Zusammenfassung:	© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation. Increasing drought phenomena pose a serious threat to agricultural productivity. Although plants have multiple ways to respond to the complexity of drought stress, the underlying mechanisms of stress sensing and signaling remain unclear. The role of the vasculature, in particular the phloem, in facilitating inter-organ communication is critical and poorly understood. Combining genetic, proteomic and physiological approaches, we investigated the role of AtMC3, a phloem-specific member of the metacaspase family, in osmotic stress responses in Arabidopsis thaliana. Analyses of the proteome in plants with altered AtMC3 levels revealed differential abundance of proteins related to osmotic stress pointing into a role of the protein in water-stress-related responses. Overexpression of AtMC3 conferred drought tolerance by enhancing the differentiation of specific vascular tissues and maintaining higher levels of vascular-mediated transportation, while plants lacking the protein showed an impaired response to drought and inability to respond effectively to the hormone abscisic acid. Overall, our data highlight the importance of AtMC3 and vascular plasticity in fine-tuning early drought responses at the whole plant level without affecting growth or yield
Beschreibung:	Date Completed 14.07.2023 Date Revised 18.07.2023 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.19022