HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Shellie, K. C. Search for Related Content PubMed Articles by Shellie, K. C. Agricola Articles by Shellie, K. C.

Vine and Berry Response of Merlot (Vitis vinifera L.) to Differential Water Stress

¹ Research horticulturist, U.S. Department of Agriculture, Agricultural Research Service, Horticultural Crops Research Laboratory, 29603 U of I Lane, Parma ID 83660.

^* Corresponding author [email: kshellie{at}uidaho.edu]

Merlot vines were drip-irrigated with 100, 70, or 35% of estimated crop evapotranspiration (ET_c) or 35% ET_c until veraison followed by 70% ET_c until harvest. Midday leaf water potential () differed among irrigation regimes and ranged from –0.9 to –1.7 MPa, with a 0.3 to 0.5 MPa difference between 35 and 100% ET_c. Decline in shoot growth, berry size, cluster weight, yield, trunk growth, cluster number, and berry titratable acidity corresponded with a decline in . Increasing irrigation from 35 to 70% ET_c at veraison consumed 30% less water producing similar yield and quality as the 70% ET_c treatment.

Key words: winegrape, evapotranspiration, leaf water potential, regulated deficit irrigation