`color{Brown}"Kinds of Pollination"` : Depending on the source of pollen, pollination can be divided into `color{Violet}"three types"`.
`color{Brown}"Autogamy"`
● This type, pollination is achieved within the `color{Violet}"same flower"`.
● Transfer of pollen grains from the `color{Violet}"anther to the stigma"` of the same flower.
● In a normal flower which opens and exposes the anthers and the stigma, `color{Violet}"complete autogamy"` is rather `color{Violet}"rare"`.
● Autogamy in such flowers requires `color{Violet}"synchrony"` in pollen `color{Violet}"release"` and stigma `color{Violet}"receptivity"` and also, the anthers and the stigma should lie `color{Violet}"close to each other"` so that self-pollination can occur.
● Some plants such as Viola (common pansy), Oxalis, and Commelina produce two types of flowers –
`star` `color{Brown}"Chasmogamous flowers"` which are similar to flowers of other species with `color{Violet}"exposed anthers and stigma"`.
`star` `color{Brown}"Cleistogamous flowers"` which do not open.
● In such flowers, the anthers and stigma lie `color{Violet}"close to each other."`
● When anthers dehisce in the flower buds, pollen grains come in `color{Violet}"contact with the stigma"` to effect pollination.
● Thus, cleistogamous flowers are `color{Violet}"invariably autogamous"` as there is no chance of cross-pollen landing on the stigma.
● Cleistogamous flowers produce `color{Violet}"assured seed-set"` even in the absence of pollinators.
`color{Brown}"Kinds of Pollination"` : Depending on the source of pollen, pollination can be divided into `color{Violet}"three types"`.
`color{Brown}"Autogamy"`
● This type, pollination is achieved within the `color{Violet}"same flower"`.
● Transfer of pollen grains from the `color{Violet}"anther to the stigma"` of the same flower.
● In a normal flower which opens and exposes the anthers and the stigma, `color{Violet}"complete autogamy"` is rather `color{Violet}"rare"`.
● Autogamy in such flowers requires `color{Violet}"synchrony"` in pollen `color{Violet}"release"` and stigma `color{Violet}"receptivity"` and also, the anthers and the stigma should lie `color{Violet}"close to each other"` so that self-pollination can occur.
● Some plants such as Viola (common pansy), Oxalis, and Commelina produce two types of flowers –
`star` `color{Brown}"Chasmogamous flowers"` which are similar to flowers of other species with `color{Violet}"exposed anthers and stigma"`.
`star` `color{Brown}"Cleistogamous flowers"` which do not open.
● In such flowers, the anthers and stigma lie `color{Violet}"close to each other."`
● When anthers dehisce in the flower buds, pollen grains come in `color{Violet}"contact with the stigma"` to effect pollination.
● Thus, cleistogamous flowers are `color{Violet}"invariably autogamous"` as there is no chance of cross-pollen landing on the stigma.
● Cleistogamous flowers produce `color{Violet}"assured seed-set"` even in the absence of pollinators.