dc.contributor.author | Querejeta, José Ignacio | |
dc.contributor.author | Prieto, Ivan | |
dc.contributor.author | Armas, Cristina | |
dc.contributor.author | Casanoves, Fernando | |
dc.contributor.author | Diémé, Joseph S. | |
dc.contributor.author | Diouf, Mayécor | |
dc.contributor.author | Yossi, Harouna | |
dc.contributor.author | Kaya, Bocary | |
dc.contributor.author | Pugnaire, Francisco I. | |
dc.contributor.author | Rusch, Graciela | |
dc.date.accessioned | 2022-06-29T06:39:55Z | |
dc.date.available | 2022-06-29T06:39:55Z | |
dc.date.created | 2022-06-24T09:52:31Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0028-646X | |
dc.identifier.uri | https://hdl.handle.net/11250/3001418 | |
dc.description.abstract | The least-cost economic theory of photosynthesis shows that water and nitrogen are mutu-ally substitutable resources to achieve a given carbon gain. However, vegetation in the Sahelhas to cope with the dual challenge imposed by drought and nutrient-poor soils.We addressed how variation in leaf nitrogen per area (Narea) modulates leaf oxygen andcarbon isotopic composition (δ18O,δ13C), as proxies of stomatal conductance and water-useefficiency, across 34 Sahelian woody species.Dryland species exhibited diverging leafδ18O andδ13C values, indicating large interspecificvariation in time-integrated stomatal conductance and water-use efficiency. Structural equa-tion modeling revealed that leaf Nareais a pivotal trait linked to multiple water-use traits. LeafNareawas positively linked to bothδ18O andδ13C, suggesting higher carboxylation capacityand tighter stomatal regulation of transpiration in N-rich species, which allows them toachieve higher water-use efficiency and more conservative water use.These adaptations represent a key physiological advantage of N-rich species, such aslegumes, that could contribute to their dominance across many dryland regions. This is thefirst report of a robust mechanistic link between leaf Nareaandδ18O in dryland vegetation that is consistent with core principles of plant physiology. δ13C, leafδ18O, plant isotopic composition,plant water-use strategies, Sahel, stomatalconductance | en_US |
dc.language.iso | eng | en_US |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.subject | δ13C | en_US |
dc.subject | leafδ18O | en_US |
dc.subject | plant isotopic composition | en_US |
dc.subject | plant water-use strategies | en_US |
dc.subject | Sahel | en_US |
dc.subject | stomatalconductance | en_US |
dc.title | Higher leaf nitrogen content is linked to tighter stomatalregulation of transpiration and more efficient water use acrossdryland trees | en_US |
dc.title.alternative | Higher leaf nitrogen content is linked to tighter stomatalregulation of transpiration and more efficient water use acrossdryland trees | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2022 The Authors | en_US |
dc.subject.nsi | VDP::Zoologiske og botaniske fag: 480 | en_US |
dc.subject.nsi | VDP::Zoology and botany: 480 | en_US |
dc.source.journal | New Phytologist | en_US |
dc.identifier.doi | 10.1111/nph.18254 | |
dc.identifier.cristin | 2034728 | |
dc.relation.project | EC/FP7/BBE2007-227265 project | en_US |
dc.relation.project | EC/FP7/FUNCiTREE | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |