Leaf carbon monoxide emissions under different drought, heat, and light conditions in the field
© 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation.
| Publié dans: | The New phytologist. - 1979. - 245(2025), 6 vom: 30. März, Seite 2439-2450 |
|---|---|
| Auteur principal: | |
| Autres auteurs: | , , , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
|
| Accès à la collection: | The New phytologist |
| Sujets: | Journal Article CO carbon monoxide drought stress heat stress leaf gas exchange Carbon Monoxide 7U1EE4V452 |
| Résumé: | © 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation. Carbon monoxide (CO) is known primarily as a globally emitted by-product of incomplete combustion from the industry and biomass burning. However, CO is also produced in living plants and acts as a stress-signalling molecule in animals and plants. While CO emissions from soil and litter decomposition have been studied, research on the CO flux from living vegetation is scarce, particularly under field conditions. Here, we present a year-long field study on the effects of light, heat, and seasonal drought on leaf CO production and flux using automated twig chambers on mature Pinus halepensis trees grown under summer-droughted and nondroughted (irrigated) conditions. We found CO buildup in drought-stressed tree leaves, with emissions linked to the heat-controlled biogenic production of CO rather than to photodegradation. In irrigated trees, CO fluxes occurred through open stomata, whereas in droughted trees, CO buildup overcame stomatal closure to result in a flux. The results support the role of CO in heat stress response and the likely mitigation of damage induced by reactive oxygen species. We highlight the need for further research into the mechanistic basis for CO flux from living plants |
|---|---|
| Description: | Date Completed 04.05.2025 Date Revised 04.05.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1469-8137 |
| DOI: | 10.1111/nph.20424 |