Stenospermocarpy

Stenospermocarpy is the biological mechanism that produces parthenocarpy (seedlessness) in some fruits, notably many table grapes.

In stenospermocarpic fruits, normal pollination and fertilization are still required to ensure that the fruit 'sets', i.e. continues to develop on the plant; however subsequent abortion of the embryo that began growing following fertilization leads to a near seedless condition.

A new cultivar, 'Melissa', has naturally larger fruit so does not require gibberellin sprays.

[3] Before the tiny embryo aborts, it is removed from the developing fruit and grown in tissue culture until it is large enough to survive on its own.

[6] Seedless grapes are divided into white, red and black types based roughly on fruit color.