Repository logo
 
Publication

Relationships between leaf water potential and photosynthetic activity of field grapevines grown under different soil water regimes

1999Conference object Open access
Simple item page
dc.contributor.authorLopes, C.M.
dc.contributor.authorVicente-Paulo, J.
dc.contributor.authorPacheco, C.
dc.contributor.authorTavares, S.
dc.contributor.authorBarroso, J.
dc.contributor.authorRodrigues, M.L.
dc.contributor.authorChaves, M.M.
dc.date.accessioned2022-01-12T10:30:27Z
dc.date.available2022-01-12T10:30:27Z
dc.date.issued1999
dc.description.abstractRelationships between ecophysiological parameters from a grapevine irrigation experiment (rain-fed vs. deficit irrigation) conducted during 1998 at Alentejo, south of Portugal, with the red variety Aragonez (syn. Tempranillo) are presented and discussed. The irrigation affected positively grapevine physiology without changing berry composition. Predawn leaf water potential shows a significant dependence on available soil water, measured by a neutron probe, the correlation coefficients being higher in nonirrigated plants than in irrigated ones. Leaf water potential (Ψ) values measured in exposed leaves in the morning and afternoon were also significantly correlated with available soil water. Net CO2 assimilation rate (A) and stomatal conductance (gs) of sun leaves measured throughout the growing season at three different periods of the day were significantly correlated with predawn leaf water potential, nonirrigated vines presenting the highest correlation coefficients. Significant correlations were also found between Ψ and A or gs measured in the early morning. Our results show that, in water stress conditions, predawn leaf water potential can be used as an indicator of soil water availability and physiological activity of sun exposed leavespt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationLopes, C.M., Vicente-Paulo, J., Pacheco, C., Tavares, S., Barroso, J., Rodrigues, M.L. e Chaves, M. M., 1999. Relationships between leaf water potential and photosynthetic activity of field grapevines grown under different soil water regimes. Proceedings 11th GESCO Meeting, University of Palermo, Sicília, Itália, 6-12 Junho 1999, Vol. 2: 211-217pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/23006
dc.language.isoengpt_PT
dc.publisherGESCOpt_PT
dc.subjectleaf water potentialpt_PT
dc.subjectphotosynthesispt_PT
dc.subjectstomatal conductancept_PT
dc.subjectirrigationpt_PT
dc.subjectwater stresspt_PT
dc.titleRelationships between leaf water potential and photosynthetic activity of field grapevines grown under different soil water regimespt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceSicilia, Itáliapt_PT
oaire.citation.titleProceedings 11th GESCO Meeting, University of Palermopt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
6.4.17 Lopes et al 1999 GESCO99.pdf
Size:
253.78 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISA - Comunicações em Conferências