Photosynthesis, leaf hydraulic conductance and embolism dynamics in the resurrection plant Barbacenia purpurea
| hal.structure.identifier | Universitat de les Illes Balears = Universidad de las Islas Baleares = University of the Balearic Islands [UIB] | |
| dc.contributor.author | NADAL, Miquel | |
| hal.structure.identifier | Universitat de les Illes Balears = Universidad de las Islas Baleares = University of the Balearic Islands [UIB] | |
| hal.structure.identifier | The CSIC Ethics Committee | |
| dc.contributor.author | CARRIQUÍ, Marc | |
| hal.structure.identifier | Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF] | |
| dc.contributor.author | BADEL, Eric | |
| hal.structure.identifier | Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF] | |
| dc.contributor.author | COCHARD, Hervé | |
| hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
| dc.contributor.author | DELZON, Sylvain | |
| hal.structure.identifier | Synchrotron SOLEIL [SSOLEIL] | |
| dc.contributor.author | KING, Andrew | |
| hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
| dc.contributor.author | LAMARQUE, Laurent | |
| hal.structure.identifier | Universitat de les Illes Balears = Universidad de las Islas Baleares = University of the Balearic Islands [UIB] | |
| dc.contributor.author | FLEXAS, Jaume | |
| hal.structure.identifier | Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF] | |
| dc.contributor.author | TORRES‐RUIZ, José | |
| dc.date.issued | 2023-10-18 | |
| dc.identifier.issn | 0031-9317 | |
| dc.description.abstractEn | Abstract The main parameters determining photosynthesis are stomatal and mesophyll conductance and electron transport rate, and for hydraulic dynamics they are leaf hydraulic conductance and the spread of embolism. These parameters have scarcely been studied in desiccation‐tolerant (resurrection) plants exposed to drought. Here, we characterized photosynthesis and hydraulics during desiccation and rehydration in a poikilochlorophyllous resurrection plant, Barbacenia purpurea (Velloziaceae). Gas exchange, chlorophyll fluorescence, and leaf water status were monitored along the whole dehydration‐rehydration cycle. Simultaneously, embolism formation and hydraulic functioning recovery were measured at leaf level using micro‐computed tomography imaging. Photosynthesis and leaf hydraulic conductance ceased at relatively high water potential (−1.28 and −1.54 MPa, respectively), whereas the onset of leaf embolism occurred after stomatal closure and photosynthesis cessation (<−1.61 MPa). This sequence of physiological processes during water stress may be associated with the need to delay dehydration, to prepare the molecular changes required in the desiccated state. Complete rehydration occurred rapidly in the mesophyll, whereas partial xylem refilling, and subsequent recovery of photosynthesis, occurred at later stages after rewatering. These results highlight the importance of stomata as safety valves to protect the vascular system from embolism, even in a plant able to fully recover after complete embolism. | |
| dc.language.iso | en | |
| dc.publisher | Wiley | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/ | |
| dc.title.en | Photosynthesis, leaf hydraulic conductance and embolism dynamics in the resurrection plant Barbacenia purpurea | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1111/ppl.14035 | |
| dc.subject.hal | Sciences du Vivant [q-bio]/Génétique/Génétique des plantes | |
| bordeaux.journal | Physiologia Plantarum | |
| bordeaux.page | e14035 | |
| bordeaux.volume | 175 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-04533836 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-04533836v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physiologia%20Plantarum&rft.date=2023-10-18&rft.volume=175&rft.issue=5&rft.spage=e14035&rft.epage=e14035&rft.eissn=0031-9317&rft.issn=0031-9317&rft.au=NADAL,%20Miquel&CARRIQU%C3%8D,%20Marc&BADEL,%20Eric&COCHARD,%20Herv%C3%A9&DELZON,%20Sylvain&rft.genre=article |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||