Abstract

1. Periodic measurements were made of the development of the fruit, seed, and embryo of the Paheri mango, Mangifera indica L. All parts exhibited a sigmoid type of curve when growth data, such as length, diameter, fresh weight, and volume, were plotted against time. 2. A delay in embryo growth for about 4 weeks following fertilization was found to occur, but by 2 weeks later the embryo completely filled the seed coats; growth of the two parts thereafter was rapid until about 12-13 weeks after fertilization and ceased when the husk hardened. 3. Growth of the ovary, at first, was more rapid than that of the seed, but by approximately 10 weeks following fertilization the seed completely filled the loculus, a condition which persisted through fruit maturation. 4. Endocarp lignification occurred during a period of 3 weeks, beginning about 10 weeks after fertilization. The husk, seed, and embryo remained constant in size after husk hardening occurred, but the fleshy part of the fruit continued to enlarge slowly until maturity.

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