Leaf hydraulic and stomatal traits coordinated with rooting depth in desert species
Rattachement africain : cn, us. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Coexisting plants in drylands with different rooting depths can exploit different spatial water sources to maintain productivity. The sequence of water potential thresholds for key physiological events during dehydration strongly influences overall plant function. However, how rooting depth coordinates with this water potential sequence remains poorly understood. Here, we measured leaf structural, hydraulic, and stomatal traits of eight coexisting desert woody species with rooting depths ranging from 69 to 337 cm. Rooting depth was positively related to hydraulic efficiency, turgor loss point, leaf embolism resistance and stomatal closure point, but negatively related to non-structural carbohydrates and water use efficiency. Positive correlations between rooting depth and hydraulic/stomatal safety margins suggested that deep-rooted species had a conservative water potential sequence, i.e. preemptively closing stomata to prevent substantial embolism occurrence. Conversely, shallow-rooted species displayed a risky water potential sequence but adopted compensatory strategies, including low water demand, strong embolism repair capacity and high carbon allocation to sapwood area relative to leaf area. Together, our results suggest that severe water limitation imposes strong selective pressure, resulting in tight coordination among rooting depth, stomatal regulation, water use, embolism resistance and repair and structural construction, which is critical for species coexistence in desert ecosystems.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Leaf hydraulic and stomatal traits coordinated with rooting depth in desert species
- Date Crossref
- 20/11/2025
- Éditeur
- Oxford University Press (OUP)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Desert Forestry Experimental Center pays non établi dans la noticeStructure de recherche
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Northeast Forestry University pays non établi dans la noticeUniversité ou école supérieure
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Chinese Academy of Forestry pays non établi dans la noticeOrganisme public
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McKing Consulting (United States) pays non établi dans la noticeEntreprise
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School of Ecology Heilongjiang Maoershan Forest Ecosystem National Observation and Research Station pays non établi dans la noticeUniversité ou école supérieure
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Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station pays non établi dans la noticeOrganisation à but non lucratif
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Experimental Center of Desert Forestry pays non établi dans la noticeInstitution
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Institute of Ecological Conservation and Restoration pays non établi dans la noticeStructure de recherche
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Acre Coking and Refractory Engineering Consulting Corporation pays non établi dans la noticeInstitution
Desert Forestry Experimental Center, Northeast Forestry University et Chinese Academy of Forestry, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.