Abstract

Abstract Variation in leaf morphology and physiological characteristics was studied in six genotypes of Annona, namely A. atemoya, A. cherimola, A. glabra, A. muricata, A. reticulata, and A. squamosa (‘Balanagar’). The genotypes differed significantly in their leaf morphology and gas exchange: specific leaf weight was maximum in A. muricata and A. reticulata; leaf area, in A. cherimola; and net photosynthesis, in A. squamosa. Water use efficiency, relative water content, epicuticular wax content, and stomatal density on abaxial and adaxial surfaces of leaves were maximum in A. glabra (although the density was equally high in A. squamosa) whereas chlorophyll a, chlorophyll b, and total chlorophyll content were maximum in A. squamosa. These differences may prove relevant in selecting Annona genotypes for adaptation to different agro-climatic regions.

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