Skip to Main content Skip to Navigation
Journal articles

Exogenous Isoprene Confers Physiological Benefits in a Negligible Isoprene Emitter (Acer monspessulanum L.) Under Water Deficit

Abstract : Isoprene, the main volatile released by plants, is known to protect the photosynthetic apparatus in isoprene emitters submitted to oxidative pressures caused by environmental constraints. Whether ambient isoprene contributes to protect negligible plant emitters under abiotic stress conditions is less clear, and no study has tested if ambient isoprene is beneficial during drought periods in plant species that naturally release negligible isoprene emissions. This study examines the effect of exogenous isoprene (20 ppbv) on net photosynthesis, stomatal conductance and production of H2O2 (a reactive oxygen species: ROS) in leaves of Acer monspessulanum (a negligible isoprene emitter) submitted to three watering treatments (optimal, moderate water stress and severe water stress). Results showed that A. monspessulanum exhibited a net photosynthesis increase (+30%) and a relative leaf H2O2 decrease when saplings were exposed to an enriched isoprene atmosphere compared to isoprene-free conditions under moderate water deficit. Such physiological improvement under isoprene exposure was not observed under optimal watering or severe water stress. These findings suggest that when negligible isoprene emitters are surrounded by a very high concentration of isoprene in the ambient air, some plant protection mechanism occurs under moderate water deficit probably related to protection against ROS damage eventually impeding photosynthesis drop.
Complete list of metadatas

Cited literature [44 references]  Display  Hide  Download

https://hal-amu.archives-ouvertes.fr/hal-02462035
Contributor : Stéphane Greff <>
Submitted on : Friday, January 31, 2020 - 9:27:08 AM
Last modification on : Tuesday, April 28, 2020 - 2:06:06 PM
Long-term archiving on: : Friday, May 1, 2020 - 1:23:07 PM

File

Ormeño et al 2020 Plants.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Citation

Elena Ormeño, Justine Viros, Jean-Philippe Mevy, Alain Tonetto, Amélie Saunier, et al.. Exogenous Isoprene Confers Physiological Benefits in a Negligible Isoprene Emitter (Acer monspessulanum L.) Under Water Deficit. Plants, MDPI, 2020, 9 (2), pp.1-14/159. ⟨10.3390/plants9020159⟩. ⟨hal-02462035⟩

Share

Metrics

Record views

161

Files downloads

208