Question

What happens after ovules are pollinated?

Answer 1

Hint: Pollination is transferring of the pollen grains from the stigma to the style of the same or other plant. After the ovules are pollinated several changes occur in the plant. Firstly, the flower being pollinated fades away leading to other changes in it.

Complete answer:
Pollination is the transfer of pollen grains from the anther to the stigma, whether of the same flower or of a different flower. It was first reported by Kolreuter in 17611. Among plants, pollination occurs in only Gymnosperms and Angiosperms.
After the fertilization takes place in plants, zygote formation takes place. The zygote is formed in the flowering plants inside the ovule. Soon after pollination, the flower begins to fade. It is sometimes accompanied by sudden increase in respiration and ethylene production. The petals, stamens and style wither off.
The pistil, however, remains attached to the plants. The zygote is developed inside the seed. The zygote develops into the embryo and the ovules develop into the seed. The ovary develops into the fruit which is usually covered up with a thick wall called a pericarp that is protective in function. After the dispersal of seed, seed germination under favourable conditions takes place to produce new plants. Inside, the mature seed is the progenitor of the next generation, the embryo. Other changes that take place are endosperm formation, embryo development, seed formation and fruit formation.

Additional information:
Pollen grains are immobile. They cannot reach the stigma by themselves and hence require an external agent. Pollination is of two types: Self pollination and cross pollination.
SELF POLLINATION- Transfer of pollen grains from the anther of a flower to the stigma of either the same plant or different but genetically similar flower. It is of two types:
a. Autogamy- It is a type of self pollination which takes place in the same flower. In a normal flower which opens and exposes the anther and the stigma, complete autogamy is rare.
b. Geitonogamy - It is a type of pollination in which pollen grains of one flower are transferred to the stigma of another flower belonging to either the same plant or genetically similar plant.
c. Xenogamy- Transfer of pollen grains from another to the stigma of a different plant. This is the only type of pollination in which pollination brings genetically different types of pollen grains to the stigma.

Note:
Plant breeders have developed improved varieties to transfer the pollen of one plant to the stigma of other plants of dissimilar genotype under controlled conditions. It is termed as hybridisation.