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PhotosyntheticaVolume 42, Issue 1, 2004, Pages 81-86

Leaf gas exchange and water relations of grapevines grown in three different conditions(Article)

  • CETAV/Univ. Tras-os-Montes Alto D., Apartado 1013, 5000-911 Vila Real, Portugal, Portugal

Abstract

Diurnal and seasonal changes in the leaf water potential (Ψ), stomatal conductance (g s), net CO 2 assimilation rate (P N), transpiration rate (E), internal CO 2 concentration (C i), and intrinsic water use efficiency (P N/g s) were studied in grapevines (Vitis vinifera L. cv. Touriga Nacional) growing in low, moderate, and severe summer stress at Vila Real (VR), Pinhão (PI), and Almendra (AL) experimental sites, respectively. In VR and PI site the limitation to photosynthesis was caused more by stomatal limitations, while in AL mesophyll limitations were also responsible for the summer decline in P N.

Author keywords

droughtleaf gas-exchangemesophyll limitationsnet photosynthetic ratestomatal conductancetranspiration rateVitis vinifera L.water potentialwater use efficiency

Indexed keywords

Species Index:VilaVitisVitis sp.Vitis vinifera

Funding details

  • 1

    *Corresponding author, fax: 00351-259-350480, e-mail: [email protected] Acknowledgements: We thank Sogrape S.A. for the agronomic management of the AL and PI experimental fields. Financial support from CETAV/UTAD is gratefully acknowledged. Special thanks to the two anonymous reviewers for their valuable suggestions and comments.

  • ISSN: 03003604
  • CODEN: PHSYB
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1023/B:PHOT.0000040573.09614.1d
  • Document Type: Article

  CETAV/Univ. Tras-os-Montes Alto D., Apartado 1013, 5000-911 Vila Real, Portugal, Portugal;
© Copyright 2012 Elsevier B.V., All rights reserved.

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