Chitosan Induces Plant Hormones and Defenses in Tomato Root Exudates

In this work, we use electrophysiological and metabolomic tools to determine the role of chitosan as plant defense elicitor in soil for preventing or manage root pests and diseases sustainably. Root exudates include a wide variety of molecules that plants and root microbiota use to communicate in th...

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Published in:Frontiers in plant science 2020-11, Vol.11, p.572087-572087
Main Authors: Suarez-Fernandez, Marta, Marhuenda-Egea, Frutos Carlos, Lopez-Moya, Federico, Arnao, Marino B, Cabrera-Escribano, Francisca, Nueda, Maria Jose, Gunsé, Benet, Lopez-Llorca, Luis Vicente
Format: Article
Language:English
Subjects:
chitosan
lipid signaling
membrane potential
plant defenses
plant hormones
Plant Science
root exudates
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Summary:In this work, we use electrophysiological and metabolomic tools to determine the role of chitosan as plant defense elicitor in soil for preventing or manage root pests and diseases sustainably. Root exudates include a wide variety of molecules that plants and root microbiota use to communicate in the rhizosphere. Tomato plants were treated with chitosan. Root exudates from tomato plants were analyzed at 3, 10, 20, and 30 days after planting (dap). We found, using high performance liquid chromatography (HPLC) and excitation emission matrix (EEM) fluorescence, that chitosan induces plant hormones, lipid signaling and defense compounds in tomato root exudates, including phenolics. High doses of chitosan induce membrane depolarization and affect membrane integrity. H-NMR showed the dynamic of exudation, detecting the largest number of signals in 20 dap root exudates. Root exudates from plants irrigated with chitosan inhibit ca. twofold growth kinetics of the tomato root parasitic fungus f. sp. radicis-lycopersici. and reduced ca. 1.5-fold egg hatching of the root-knot nematode .
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2020.572087