As mentioned earlier,
the ovary becomes the fruit and the ovule becomes the seed after fertilization.
However in a number of cases, fruit like structures may develop from the ovary
without the act of fertilization. Such fruits are called parthenocarpic
fruits. Invariably they will not have true seeds. Many commercial fruits
are made seedless. Examples: Banana, Grapes and Papaya.
Nitsch in 1963
classified the parthenocarpy into following types:
due to hybridization or mutation Examples: Citrus,Cucurbita.
like frost, fog, low temperature, high temperature etc., induce Parthenocarpy.
For example, low temperature for 3-19 hours induces parthenocarpy in Pear.
Application of growth promoting substances like Auxins and
Gibberellins induces parthenocarpy.
The seedless fruits have great significance in horticulture.
The seedless fruits have great commercial importance.
Seedless fruits are useful for the preparation of jams, jellies,
sauces, fruit drinks etc.
High proportion of edible part is available in parthenocarpic
fruits due to the absence of seeds.