Cryptochrome 1a of tomato mediates long-distance signaling of soil water deficit

D'Amico-Damião, V. and Dodd, I.C. and Oliveira, R. and Lúcio, J.C.B. and Rossatto, D.R. and Carvalho, R.F. (2021) Cryptochrome 1a of tomato mediates long-distance signaling of soil water deficit. Plant Science, 303: 110763. ISSN 0168-9452

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Although the blue light photoreceptors cryptochromes mediate the expression of genes related to reactive oxygen species, whether cryptochrome 1a (cry1a) regulates local and long-distance signaling of water deficit in tomato (Solanum lycopersicum L.) is unknown. Thus the cry1a tomato mutant and its wild-type (WT) were reciprocally grafted (WT/WT; cry1a/cry1a; WT/cry1a; cry1a/WT; as scion/rootstock) or grown on their own roots (WT and cry1a) under irrigated and water deficit conditions. Plant growth, pigmentation, oxidative stress, water relations, stomatal characteristics and leaf gas exchange were measured. WT and cry1a plants grew similarly under irrigated conditions, whereas cry1a plants had less root biomass and length and higher tissue malondialdehyde concentrations under water deficit. Despite greater oxidative stress, cry1a maintained chlorophyll and carotenoid concentrations in drying soil. Lower stomatal density of cry1a likely increased its leaf relative water content (RWC). In grafted plants, scion genotype largely determined shoot and root biomass accumulation irrespective of water deficit. In chimeric plants grown in drying soil, cry1a rootstocks increased RWC while WT rootstocks maintained photosynthesis of cry1a scions. Manipulating tomato CRY1a may enhance plant drought tolerance by altering leaf pigmentation and gas exchange during soil drying via local and long-distance effects.

Item Type:
Journal Article
Journal or Publication Title:
Plant Science
Additional Information:
This is the author’s version of a work that was accepted for publication in Plant Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Plant Science, 303, 2021 DOI: 10.1016/j.plantsci.2020.110763
Uncontrolled Keywords:
?? abiotic stresscry1a mutantdroughtroot-shoot signalingsolanum lycopersicum l.water deficitplant sciencegeneticsagronomy and crop science ??
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08 Jan 2021 12:15
Last Modified:
07 Nov 2023 01:05