Document Detail

Interactions between light and growing season temperatures on, growth and development and gas exchange of Semillon (Vitis vinifera L.) vines grown in an irrigated vineyard.
MedLine Citation:
PMID:  22381656     Owner:  NLM     Status:  Publisher    
High-light intensities and temperatures of the warm climate regions of Australia and elsewhere have a major effect on the growth and development of grapevines (Vitis vinifera L.). The objective of this research was to assess interactions between the light and seasonal temperatures by shading some vines and comparing these with vines exposed to high-light intensities. Canopy temperatures were monitored using infrared radiometers and budbreak, phenology, growth, yield, berry ripening and gas exchange determined over three growing seasons. Results showed canopies were generally about 4 °C cooler than air and shading extended this cooling. Irradiance, irrespective of seasonal temperatures, had no effect on time of budbreak, shoot phenology, stem growth, yield and bunch fresh weights while bunch and leaf dry weights were reduced in low-light. Bunch ripening was initially delayed by low-light but thereafter the ripening process was highly temperature-dependent. Rates increased linearly with increasing temperature in both low and high-light and were optimal at about 35 °C. Maximum photosynthetic capacity was impaired by low irradiance, in accordance with shade leaf attributes, and attributable to stomatal closure. No effects of the low photosynthetic capacity apparently carried-over to sugar accumulation, consistent with the strong sink capacity of bunches.
Dennis H Greer; Mark M Weedon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-13
Journal Detail:
Title:  Plant physiology and biochemistry : PPB / Societe francaise de physiologie vegetale     Volume:  54C     ISSN:  1873-2690     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-3-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882449     Medline TA:  Plant Physiol Biochem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  59-69     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Masson SAS.
National Wine and Grape Industry Centre, Charles Sturt University, Locked Bag 588, Wagga Wagga 2678, NSW, Australia.
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