Embryogenesis in higher plants follows a standard developmental program with sequential stages of histodifferentiation, maturation (reserve deposition), and postabscission (desiccation and rapid decline in metabolic activity). In this study, morphological, physiological and anatomical characteristics were integrated to demarcate the developmental stages of pecan embryos. Fruit were collected, morphological characteristics were recorded, fresh and dry weights, and water content of embryos were determined, and embryos were prepared for microscopic study. The procedures used here can be a useful guide for characterizing embryo development in pecan and related species.
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