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ABA during reproductive development in non‐irrigated grapevines ( Vitis vinifera L. cv. Tempranillo)

ABA during reproductive development in non‐irrigated grapevines ( Vitis vinifera L. cv. Tempranillo) In grapevines, stomatal aperture decreases after a mid‐morning peak during summer days. Afternoon stomatal closure increases in non‐irrigated plants as water limitation progresses, which suggests the involvement of abscisic acid (ABA) in the control of stomatal aperture. The objective of this work was to study the seasonal and diurnal time‐courses of CO2 assimilation rate, leaf conductance, leaf water potential +, and ABA concentration in xylem sap, leaves, flowers and berries in non‐irrigated field‐grown Tempranillo grapevines throughout reproductive development. Leaf decreased throughout fruit development because water availability decreased towards the end of the reproductive cycle. CO2 assimilation rate, leaf conductance and xylem ABA concentration also decreased during the course of the growing season. Combining all measurements xylem ABA was either not correlated, or only slightly correlated, with leaf water status + and daily leaf conductance, respectively. This lack of relationship indicates that xylem ABA during fruit ripening had functions other than provision of a non‐hydraulic signal. On a seasonal basis, xylem ABA concentration measured in non‐irrigated grapevines was well related to berry ABA concentration, especially at the end of fruit development (veraison and harvest). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Journal of Grape and Wine Research Wiley

ABA during reproductive development in non‐irrigated grapevines ( Vitis vinifera L. cv. Tempranillo)

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References (48)

Publisher
Wiley
Copyright
Copyright © 2003 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1322-7130
eISSN
1755-0238
DOI
10.1111/j.1755-0238.2003.tb00266.x
Publisher site
See Article on Publisher Site

Abstract

In grapevines, stomatal aperture decreases after a mid‐morning peak during summer days. Afternoon stomatal closure increases in non‐irrigated plants as water limitation progresses, which suggests the involvement of abscisic acid (ABA) in the control of stomatal aperture. The objective of this work was to study the seasonal and diurnal time‐courses of CO2 assimilation rate, leaf conductance, leaf water potential +, and ABA concentration in xylem sap, leaves, flowers and berries in non‐irrigated field‐grown Tempranillo grapevines throughout reproductive development. Leaf decreased throughout fruit development because water availability decreased towards the end of the reproductive cycle. CO2 assimilation rate, leaf conductance and xylem ABA concentration also decreased during the course of the growing season. Combining all measurements xylem ABA was either not correlated, or only slightly correlated, with leaf water status + and daily leaf conductance, respectively. This lack of relationship indicates that xylem ABA during fruit ripening had functions other than provision of a non‐hydraulic signal. On a seasonal basis, xylem ABA concentration measured in non‐irrigated grapevines was well related to berry ABA concentration, especially at the end of fruit development (veraison and harvest).

Journal

Australian Journal of Grape and Wine Research – Wiley

Published: Oct 1, 2003

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