Opposing Roles of Plant Laticifer Cells in the Resistance to Insect Herbivores and Fungal Pathogens
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INVESTIGACIONMetadata
Title
Opposing Roles of Plant Laticifer Cells in the Resistance to Insect Herbivores and Fungal PathogensAuthor (s)
Date
2020Publisher
ElsevierBibliographic citation
Castelblanque et al., Opposing Roles of Plant Laticifer Cells in the Resistance to Insect Herbivores and Fungal Pathogens, Plant Communications (2020), https://doi.org/10.1016/j.xplc.2020.100112Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S2590346220301437Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
More than 12,000 plant species (ca. 10% of flowering plants) exude latex when their tissues are injured. Latex is produced and stored in specialized cells named ‘‘laticifers’’. Laticifers form a tubing system
composed ... [+]
More than 12,000 plant species (ca. 10% of flowering plants) exude latex when their tissues are injured. Latex is produced and stored in specialized cells named ‘‘laticifers’’. Laticifers form a tubing system
composed of rows of elongated cells that branch and create an internal network encompassing the entire
plant. Laticifers constitute a recent evolutionary achievement in ecophysiological adaptation to specific
natural environments; however, their fitness benefit to the plant still remains to be proven. The identification of Euphorbia lathyris mutants (pil mutants) deficient in laticifer cells or latex metabolism, and therefore
compromised in latex production, allowed us to test the importance of laticifers in pest resistance. We provided genetic evidence indicating that laticifers represent a cellular adaptation for an essential defense
strategy to fend off arthropod herbivores with different feeding habits, such as Spodoptera exigua and Tetranychus urticae. In marked contrast, we also discovered that a lack of laticifer cells causes complete
resistance to the fungal pathogen Botrytis cinerea. Thereafter, a latex-derived factor required for conidia
germination on the leaf surface was identified. This factor promoted disease susceptibility enhancement
even in the non-latex-bearing plant Arabidopsis. We speculate on the role of laticifers in the coevolutionary arms race between plants and their enemies. [-]
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Plant Communications (2020)Investigation project
RTI2018-098501-B-I00Rights
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