What are the contrivances for self pollination?

The major contrivances of self-pollination are:

• Bisexuality.
• Homogamy.
• Cleistogamy.

What way’s do flowers pollinate?

Pollination is an essential part of plant reproduction. Pollen from a flower’s anthers (the male part of the plant) rubs or drops onto a pollinator. The pollinator then take this pollen to another flower, where the pollen sticks to the stigma (the female part). The fertilized flower later yields fruit and seeds.

What is the contrivances of cross pollination?

When the pollen of a flower pollinates the stigma of another flower located on a different plant, whether of the same kind or not, it is called cross-pollination or allogamy.

What are methods of pollination?

There are two types of pollination which are self (auto) pollination and mixed (cross) pollination, Self (auto) pollination is the transfer of pollen grains from the anthers of a flower to the stigmas of the same flower or to another flower in the same plant, Mixed (cross) pollination is the transfer of pollen grains …

Which is the best plant for cross pollination?

The special devices or adaptations which favour cross pollination are as follows: Flowers are unisexual. The plants may be monoecious or dioecious. Monoecious plants bear both male and female flowers for example, maize, pumpkin, cucumber, castor etc.

What kind of flower has honey and pollen?

Bird-pollinated or ornithophilous flowers are large, brightly coloured and showy. A large number of there usually remain aggregated together and they possess profuse quantities of honey and pollen grains. This type of flower is common in forests where birds of different kinds are present.

How does a potato flower prevent self pollination?

Self-sterility is observed in potato, tobacco, tea, crucifers etc. The stamens and carpels of a bisexual flower mature at different times, thereby preventing self-pollination. Such condition is known as dichogamy. Dichogamy manifests itself in two ways. a) Protandry: In such flowers, the anthers mature earlier than the stigma.

When does cross pollination take place in monoecious plants?

In monoecious plant, self-pollination or cross pollination takes place whereas in dioecious plant, only cross pollination takes place. In this condition, pollen grains from the same flower or any flower of the same strain does not have any effect on the stigma.