Changes in the Level of Acidic and Neutral Growth Promoters During Fruit Development in Dashehari Mango(Mangifera IndicaL.)

Abstract

SummaryThree growth-promoting substances occurred in developing mango fruits, two of which (A and B) were acidic and one (C) neutral. Analysis of the whole fruit, pericarp and seed showed that all three growth promoting substances were present in greatest quantity in the seed, thus indicating the seed to be the chief centre of auxin production in mango fruits. The peak period of growth-substance production in the seed corresponded to the time of rapid fruit growth; thereafter the rate of production declined gradually, although the total amount of all the three growth promoters present per fruit and per seed increased consistently until the fruits reached full size. The inability of auxins alone to induce parthenocarpy in mango fruits suggests that a complex of growth hormones such as kinins and gibberellins as well as auxins are involved in fruit development.