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Genotypic variations in chlorophyll fluorescence and stomatal conductance of cocoa in relation to drought tolerance

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Title Genotypic variations in chlorophyll fluorescence and stomatal conductance of cocoa in relation to drought tolerance
Not Available
 
Creator D. Balasimha
S. Elain Apshara
C.T. Jose
 
Subject Genotypic variation
chlorophyll fluorescence
stomatal conductance
cocoa
drought tolerance
 
Description Not Available
Cocoa plants are susceptible to environmental conditions, especially temperature and drought. The chlorophyll fluorescence and stomatal characteristics indicated the high adaptation of cocoa leaves to under-storey conditions. The present study was carried out to access the level of drought tolerance in newly introduced genotypes of cocoa. In general, the chlorophyll fluorescence indices and stomatal conductance were significantly decreased during stress period as compared to non-stress period. There were significant variations in these parameters among different genotypes. Similarly, the leaf water potential was also reduced and showed genotypic variations. The results based on cluster analysis indicated existence of 11 groups, based on Rescaled Value Distance (Euclidian distance 5). Among the cocoa clones, AMZ-10/A, AMZ-12 and AM-3/9 were most susceptible to drought. The most tolerant genotypes based on the difference in physiological variables and rank sums were in group 2, which included RIM-189, RIM-2, RB-49, RB-47 and JA-1/19. The results indicated genetic variability in cocoa in response to drought stress.
Not Available
 
Date 2019-10-31T10:21:07Z
2019-10-31T10:21:07Z
2013-01-01
 
Type Article
 
Identifier Journal of Plantation Crops, 2013, 41(1): 40-45
2454-8480
http://krishi.icar.gov.in/jspui/handle/123456789/24238
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Plantation Crops