Study on the response of diploid, tetraploid and hexaploid species of wheat to the elevated CO2

Uprety , D.C. and Dwivedi, N. and Raj, A. (2009) Study on the response of diploid, tetraploid and hexaploid species of wheat to the elevated CO2. Physiology and Molecular Biology of Plants, 15 (2). pp. 161-168.

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Study was done to compare the response of Triticum aestivum (hexaploid), Triticum durum (tetraploid) and Triticum monococcum (diploid) wheat species to the elevated CO2 using Free Air CO2 Enrichment (FACE) facility. It was demonstrated that the modern cultivar of wheat Triticum aestivum (hexaploid) was largely sink limited. It appeared to have less photosynthesis per unit leaf area than Triticum monococcum (diploid wheat). While leaf size, grain weight and amylase activity increased with the ploidy level from diploid to hexaploid wheat forms, the photosynthetic rate was reduced significantly. These wheat species responded differentially to the elevated CO2. The larger leaf area and greater seed weight and presence of 38 KDa protein band caused by elevated CO2 had additive effect in improving the productivity of hexaploid wheat by changing the source sink ratio. Whereas, such a source sink balance was not induced by elevated CO2 in diploid wheat. The increasing CO2 may present opportunities to breeders and possibly allow them to select for cultivars responsive to the elevated CO2 with better sink potential

Item Type: Article
Uncontrolled Keywords: Elevated CO2 - face technology - photosynthesis - seed weight - source sink ratio - triticum
Author Affiliation: 1.Indian Agricultural Research Institute Division of Plant Physiology New Delhi 110 012 India
Subjects: Crop Improvement
Divisions: Other Crops
Depositing User: Ms K Syamalamba
Date Deposited: 17 Nov 2011 10:35
Last Modified: 17 Nov 2011 10:35
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