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Journal Article

Journal Article

Injury to Photosynthesis and Productivity from Interaction Between High Temperature and Drought During Maturation of Wheat  [2005]

Nazeer H. Shah ; Gary M. Paulsen ;

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The present study aims to compare effects of high temperature and drought and to ascertain their interactions on photosynthesis and productivity of wheat. Len plants were uniformly grown in silt-loam soil [surface horizon of Ivan and Kennebec silt loams (fine-silty, mixed, mesic cumulic Hapudolls)] until anthesis and then subjected to day/night temperatures of 15/10, 25/20, or 35/30°C and moisture regimes of no drought (field capacity) and drought (-2.0 to -2.8 MPa plant water potential) in controlled environments until maturity. High temperature hastened the decline in photosynthetic rate and viable leaf area during maturation, decreased shoot and grain mass and kernel weight and soluble sugar content at maturity and reduced water use efficiency. Drought increased stomatal resistance; decreased photosynthesis, viable leaf area, shoot mass, grain mass and kernel weight and soluble sugar content and enhanced water use efficiency. Adverse effects were much more pronounced at high temperature than low temperature. Osmotic adjustment to drought was apparently promoted by low temperature of wheat to high temperature would improve its adaptation to regions with elevated temperature and either ample or deficit moisture.
From the journal
Asian Journal of Plant Sciences
ISSN : 1812-5697

Bibliographic information

Type:
Journal Article
In AGRIS since:
2012
Volume:
4
Issue:
1
Start Page:
757
End Page:
762
Publisher:
Asian Network for Scientific Information
All titles:
"Injury to Photosynthesis and Productivity from Interaction Between High Temperature and Drought During Maturation of Wheat"@eng
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Bibliographic information

Type:
Journal Article
In AGRIS since:
2012
Volume:
4
Issue:
1
Start Page:
757
End Page:
762
Publisher:
Asian Network for Scientific Information
All titles:
"Injury to Photosynthesis and Productivity from Interaction Between High Temperature and Drought During Maturation of Wheat"@eng