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

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dc.contributor.authorBalasimha, D.
dc.contributor.authorElain Apshara, S.
dc.contributor.authorJose, C.T.
dc.date.accessioned2014-06-20T07:24:51Z
dc.date.available2014-06-20T07:24:51Z
dc.date.issued2013-04
dc.description.abstractCocoa 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.en_US
dc.identifier.citationJournal of Plantation Crops April 2013 Vol.41(1) p.40-45en_US
dc.identifier.urihttp://hdl.handle.net/123456789/3156
dc.language.isoenen_US
dc.subjectChlorophyll fluorescenceen_US
dc.subjectcocoaen_US
dc.subjectdroughten_US
dc.subjectstress tolerance stomatal conductanceen_US
dc.subjectwater potentialen_US
dc.titleGenotypic variations in chlorophyll fluorescence and stomatal conductance of cocoa in relation to drought toleranceen_US
dc.typeArticleen_US

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