Aquaporins, and not changes in root structure, provide new insights into physiological responses to drought, flooding, and salinity
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| hal.structure.identifier | Nicholas School of the Environment | |
| dc.contributor.author | DOMEC, Jean-Christophe | |
| hal.structure.identifier | North Carolina State University [Raleigh] [NC State] | |
| dc.contributor.author | KING, John | |
| hal.structure.identifier | Hollins University | |
| dc.contributor.author | CARMICHAEL, Mary | |
| hal.structure.identifier | Clemson University | |
| dc.contributor.author | OVERBY, Anna Treado | |
| hal.structure.identifier | SILVA [SILVA] | |
| dc.contributor.author | WORTEMANN, Remi | |
| hal.structure.identifier | Wake Forest University | |
| dc.contributor.author | SMITH, William | |
| hal.structure.identifier | Fujian Normal University [Fujian] | |
| dc.contributor.author | MIAO, Guofang | |
| hal.structure.identifier | Texas A&M University System | |
| dc.contributor.author | NOORMETS, Asko | |
| hal.structure.identifier | University of Georgia [USA] | |
| dc.contributor.author | JOHNSON, Daniel | |
| dc.date.accessioned | 2024-04-08T11:51:10Z | |
| dc.date.available | 2024-04-08T11:51:10Z | |
| dc.date.issued | 2021-05-28 | |
| dc.identifier.issn | 0022-0957 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/195420 | |
| dc.description.abstractEn | The influence of aquaporin (AQP) activity on plant water movement remains unclear, especially in plants subject to unfavorable conditions. We applied a multitiered approach at a range of plant scales to (i) characterize the resistances controlling water transport under drought, flooding, and flooding plus salinity conditions; (ii) quantify the respective effects of AQP activity and xylem structure on root (K-root), stem (K-stem), and leaf (K-leaf) conductances; and (iii) evaluate the impact of AQP-regulated transport capacity on gas exchange. We found that drought, flooding, and flooding plus salinity reduced K(root )and root AQP activity in Pinus taeda, whereas K-root of the flood-tolerant Taxodium distichum did not decline under flooding. The extent of the AQP control of transport efficiency varied among organs and species, ranging from 35-55% in K-root to 10-30% in K-stem and K-leaf. In response to treatments, AQP-mediated inhibition of K root rather than changes in xylem acclimation controlled the fluctuations in K-root. The reduction in stomata! conductance and its sensitivity to vapor pressure deficit were direct responses to decreased whole-plant conductance triggered by lower K-root and larger resistance belowground. Our results provide new mechanistic and functional insights on plant hydraulics that are essential to quantifying the influences of future stress on ecosystem function. | |
| dc.description.sponsorship | Effet du changement climatique sur les stratégies d'amélioration de l'utilisation en eau des bassin versants et des systèmes agrosylvopastoraux Méditerranéens | |
| dc.description.sponsorship | Assessments of vulnerability of mature and secondary forests to climatic water stress in Southeast Asia - ANR-17-ASIE-0007 | |
| dc.language.iso | en | |
| dc.publisher | Oxford University Press (OUP) | |
| dc.subject.en | aquaporin activity | |
| dc.subject.en | bald cypress | |
| dc.subject.en | conductances | |
| dc.subject.en | flooding | |
| dc.subject.en | leaf water relations | |
| dc.subject.en | loblolly pine | |
| dc.subject.en | Pinus taeda | |
| dc.subject.en | plant hydraulics | |
| dc.subject.en | Taxodium distichum | |
| dc.subject.en | water stress | |
| dc.title.en | Aquaporins, and not changes in root structure, provide new insights into physiological responses to drought, flooding, and salinity | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1093/jxb/erab100 | |
| dc.subject.hal | Sciences de l'environnement | |
| bordeaux.journal | Journal of Experimental Botany | |
| bordeaux.page | 4489-4501 | |
| bordeaux.volume | 72 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.issue | 12 | |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03276339 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03276339v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Experimental%20Botany&rft.date=2021-05-28&rft.volume=72&rft.issue=12&rft.spage=4489-4501&rft.epage=4489-4501&rft.eissn=0022-0957&rft.issn=0022-0957&rft.au=DOMEC,%20Jean-Christophe&KING,%20John&CARMICHAEL,%20Mary&OVERBY,%20Anna%20Treado&WORTEMANN,%20Remi&rft.genre=article |
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