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Plant function and evolutionary biology
REVIEW

Light-driven modulation of plant response to water deficit. A review

K. Okoń A , M. Zubik-Duda B and A. Nosalewicz https://orcid.org/0000-0001-5864-5619 A *
+ Author Affiliations
- Author Affiliations

A Institute of Agrophysics, Polish Academy of Sciences, Lublin, Poland.

B Department of Biophysics, Institute of Physics, Maria Curie-Sklodowska University in Lublin, Lublin, Poland.

* Correspondence to: a.nosalewicz@ipan.lublin.pl

Handling Editor: Rana Munns

Functional Plant Biology 52, FP24295 https://doi.org/10.1071/FP24295
Submitted: 15 November 2024  Accepted: 4 April 2025  Published: 22 April 2025

© 2025 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

The dependence of agriculture on water availability is an important premise justifying attempts to enhance water use efficiency for plant production. Photosynthetic efficiency, directly impacts biomass production, is dependent on both water availability and the quality and quantity of light. Understanding how these factors interact is crucial for improving crop yields. Many overlapping signalling pathways and functions of common bioactive molecules that shape plant responses to both water deficit and light have been identified and discussed in this review. Separate or combined action of these environmental factors include the generation of reactive oxygen species, biosynthesis of abscisic acid, stomatal functioning, chloroplast movement and alterations in the levels of photosynthetic pigments and bioactive molecules. Plant response to water deficit depends on light intensity and its characteristics, with differentiated impacts from UV, blue, and red light bands determining the strength and synergistic or antagonistic nature of interactions. Despite its significance, the combined effects of these environmental factors remain insufficiently explored. The findings highlight the potential for optimising horticultural production through controlled light conditions and regulated deficit irrigation. Future research should assess light and water manipulation strategies to enhance resource efficiency and crop nutritional value.

Keywords: chloroplast movement, drought, guard cell, light bands, light intensity, melatonin, photosynthetic pigments, UV.

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