Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
Pakistan Journal of Biological Sciences
  Year: 1999 | Volume: 2 | Issue: 4 | Page No.: 1394-1397
DOI: 10.3923/pjbs.1999.1394.1397
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

The Influence of Short-term Partial Shading on Photosynthesis and Stomatal Conductance in Relations to Water Status of Grapevines (Vitis vinifera L.)

Ghulam Nabi , Micheal Trought and David Whitehead

Abstract:
This project was designed to investigate the impact of short term light intensity changes in relation to water status of grapevine (Vitis vinifera L.) cv. Pinot noir canopy. Shading caused a rapid increase in the net photosynthesis (A) and stomatal conductance (gs) of the illuminated part of the canopy. Water-stress reduced A and gs compared to well-watered vines. Intercellular CO2 concentration (Ci) was unaffected by shading or crop loading. The overall response by vines to partial shading was similar across all water stress treatments. It is concluded that in grapevines, the rapid changes in A and gs in the illuminated part of the canopy caused by partial shading elsewhere, are regulated by hydraulic processes. However, the mechanisms by which stomata sense those changes are still unknown.
PDF Citation Report Citation
How to cite this article:

Ghulam Nabi , Micheal Trought and David Whitehead , 1999. The Influence of Short-term Partial Shading on Photosynthesis and Stomatal Conductance in Relations to Water Status of Grapevines (Vitis vinifera L.) . Pakistan Journal of Biological Sciences, 2: 1394-1397.

DOI: 10.3923/pjbs.1999.1394.1397

URL: https://scialert.net/abstract/?doi=pjbs.1999.1394.1397

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

Curve Bottom