Balasimha, D.2014-08-062014-08-061991Plant Physiol. Biochem. 1993 v-20 i-1 p-16-18http://hdl.handle.net/123456789/4623The relationship between stomatal conductance (g,), net photosynthesis (A) and transpiration rate (E) have been studied in leaves of drought tolerant and susceptible accessions of cocoa (Theobroma cacao L.). Photosynthesis was not significantly different between the accession types. The A/g, ratio increased during dry months accompanied by a decrease in intercellular C02(C|). The depression in A was due to lower gr The instantaneous water use efficiency (A/E) was positively correlated with A and it was higher in drought tolerant trees. The A/C, ratio decreased in dry season and was positively correlated with A/E. Thus, high A/E and A/C( along with low g, and E during stress period may be important factors contributing to drought tolerance In cocoa.enCocoanet photosynthesistranspirationwater use efficiencydrought toleranceArticle