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Better root:shoot ratio conferred enhanced harvest index in transgenic groundnut overexpressing the rd29A:DREB1A gene under intermittent drought stress in an outdoor lysimetric dry-down trial

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http://ejournal.icrisat.org/index.htm
 
Title Better root:shoot ratio conferred enhanced harvest index in transgenic groundnut overexpressing the rd29A:DREB1A gene under intermittent drought stress in an outdoor lysimetric dry-down trial
 
Creator Shridhar Rao, J
Vadez, V
Bhatnagar-Mathur, P
Narasu, M L
Sharma, K K
 
Subject Groundnut
 
Description An outdoor confined trial was conducted during the
postrainy season of 2009 for physiological evaluation of
induced drought tolerance in transgenic plants of
groundnut variety JL 24 overexpressing a transcription
factor, DREB1A driven by the stress-inducible promoter
of the rd29A gene, both from Arabidopsis thaliana.
Lysimetric system was used for growing the plants, where
intermittent drought stress was imposed at mid-flowering
and peak pod-filling stages of the crop, by subjecting
plants to a cycle of drying and re-watering. The lysimetric
system facilitated complete recovery of roots, thereby,
facilitating studies on variations in the root:shoot ratio
induced across the genotypes under controlled wellwatered
(WW) and imposed drought stress (DS)
conditions. Under DS the root:shoot ratio showed a
significant (P
 
Publisher International Crops Research Institute for the Semi-Arid Tropics
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6249/1/KKS.pdf
Shridhar Rao, J and Vadez, V and Bhatnagar-Mathur, P and Narasu, M L and Sharma, K K (2012) Better root:shoot ratio conferred enhanced harvest index in transgenic groundnut overexpressing the rd29A:DREB1A gene under intermittent drought stress in an outdoor lysimetric dry-down trial. Journal of SAT Agricultural Research, 10. pp. 1-7. ISSN 0973-3094