The Impact of Heat Stress and Water Deficit on the Photosynthetic and Stomatal Physiology of Olive (Olea europaea L.)-A Case Study of the 2017 Heat Wave

Plants
Matthew HaworthMauro Centritto

Abstract

Heat waves are predicted to increase in frequency and duration in many regions as global temperatures rise. These transient increases in temperature above normal average values will have pronounced impacts upon the photosynthetic and stomatal physiology of plants. During the summer of 2017, much of the Mediterranean experienced a severe heat wave. Here, we report photosynthetic leaf gas exchange and chlorophyll fluorescence parameters of olive (Olea europaea cv. Leccino) grown under water deficit and full irrigation over the course of the heat wave as midday temperatures rose over 40 °C in Central Italy. Heat stress induced a decline in the photosynthetic capacity of the olives consistent with reduced ribulose-1,5-bisphosphate carboxylase/oxygenase (RubisCO) activity. Damage to photosystem II was more apparent in plants subject to water deficit. In contrast to previous studies, higher temperatures induced reductions in stomatal conductance. Heat stress adversely affected the carbon efficiency of olive. The selection of olive varieties with enhanced tolerance to heat stress and/or strategies to mitigate the impact of higher temperatures will become increasingly important in developing sustainable agriculture in the Mediterranean...Continue Reading

References

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Citations

May 8, 2020·Functional Plant Biology : FPB·Ifigeneia MellidouKalliopi A Roubelakis-Angelakis
May 23, 2020·Journal of Experimental Botany·Nasser SewelamVeronica G Maurino
Aug 11, 2020·The Plant Journal : for Cell and Molecular Biology·John N FergusonErik H Murchie
Oct 22, 2019·Frontiers in Plant Science·Andrea MiserereMaria Cecilia Rousseaux
Oct 15, 2019·Frontiers in Plant Science·Joaquim Miguel CostaMaria Margarida Oliveira
Jul 26, 2019·International Journal of Molecular Sciences·Federico SebastianiMassimiliano Tattini
Oct 16, 2020·Plant, Cell & Environment·Fernanda MarchettiGabriela Carolina Pagnussat

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Methods Mentioned

BETA
Fluorescence

Software Mentioned

Biolyzer

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