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Individual and interactive effects of elevated carbon dioxide and ozone on tropical wheat (<i style="mso-bidi-font-style:normal">Triticum aestivum</i> L.) cultivars with special emphasis on ROS generation and activation of antioxidant defence system

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Title Individual and interactive effects of elevated carbon dioxide and ozone on tropical wheat (Triticum aestivum L.) cultivars with special emphasis on ROS generation and activation of antioxidant defence system
 
Creator Mishra, Amit Kumar
Rai, Richa
Agrawal, S B
 
Subject Open top chambers
Reactive oxygen species
Antioxidants
Yield
Triticum aestivum L.
Elevated CO2 and O3
 
Description 139-149
The effects of elevated CO2 and O3,
singly and in combination were investigated on various physiological,
biochemical and yield parameters of two locally grown wheat (Triticum aestivum L.) cultivars (HUW-37
and K-9107) in open top chambers (OTCs). Elevated CO2 stimulated
photosynthetic rate (Ps) and Fv/Fm ratio and reduced the
stomatal conductance (gs). Reactive oxygen species, lipid
peroxidation, anti-oxidative enzymes, ascorbic acid and total phenolics were
higher, whereas Ps, gs, Fv/Fm, protein and
photosynthetic pigments were reduced in elevated O3 exposure, as
compared to their controls. Under elevated CO2 + O3,
elevated levels of CO2 modified the plant performance against O3
in both the cultivars. Elevated CO2 caused significant increase in
economic yield. Exposure to elevated O3 caused significant reduction
in yield and the effect was cultivar-specific. The study concluded that
elevated CO2 ameliorated the negative impact of elevated O3
and cultivar HUW-37 was more sensitive to elevated O3 than K-9107.
 
Date 2013-04-18T07:31:14Z
2013-04-18T07:31:14Z
2013-04
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://hdl.handle.net/123456789/17098
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJBB Vol.50(2) [April 2013]