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Individual Heat and Combined Heat Drought Stresses in Wheat: Variation in NDVI and Canopy Temperature

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Title Individual Heat and Combined Heat Drought Stresses in Wheat: Variation in NDVI and Canopy Temperature
 
Creator S. Gurumurthy
Ajay Arora1
Basudeb Sarkar
Harikrishna
V.P. Singh
S.K. Meena,
Prakash Kumar
P.K. Singh
 
Subject Heat stress
Combined stress
NDVI
Canopy temperature
 
Description Not Available
The present study was conducted to determine genotypic variations for normalized
difference vegetation index (NDVI) and canopy temperature (CT) in wheat under terminal
heat and combined heat and drought stresses. Forty-four wheat genotypes were evaluated
under late sown with irrigation (heat stress) and without irrigation (combined heat and
drought stress) in an environment with average temperatures of 28.6°C during the growing
season and 30.62°C during the grain filling stage. Moisture under heat stress range from
14.84 to 19.12 % whereas under combined stress it was 5.08 to 10.49 %. The mean grain
yield was 106.7 and 123.4 gm/ plot under heat stress and combined stress respectively. The
mean CT 24.1 and 29.4 0 C was under heat stress and combined stress respectively. The
mean NDVI 0.57 and 0.50 under heat stress and combined stress respectively. Overall,
under combined stress there was a 13 %decrease in NDVI, 18% increase in the CT and
13.5% increase in the yield than the heat stressed genotypes. The negative correlation
between NDVI and yield whereas positive correlation between CT and grain yield under
combined stress. The NDVI and CT are the two physiological traits to measure high
yielding genotypes under combined stress.
 
Date 2022-09-21T09:30:50Z
2022-09-21T09:30:50Z
2018-10-10
 
Type Article
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/74416
 
Language English
 
Publisher Not Available