Define pollination and it’s classification system of different types.

Class 12th NCERT biology seminar.

IlDR

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Define pollination and it’s classification system of different types.

Class 12th NCERT biology seminar.

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Harper 3 months 2021-07-31T15:07:17+00:00 2 Answers 0 views 0

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    2021-07-31T15:08:32+00:00

    Class 12th Biology – Pollination

    1. Define Pollination.

    A: The transfer of pollen grains shed from the anther( Male reproductive organ in flower ) to the stigma of pistil( Female reproductive organ in flower ) is termed known as pollination. This eventually precedes to the fertilization.

    2. Types of Pollination

    A: In classification system there are about 2 types of pollination:

    • Self pollination
    • Cross pollination ( or ) Xenogamy

    Self pollination ( fertilisation in the same plant ) is divided into two types, they are:

    • Autogamy – Transfer of pollen grains from the anther to the stigma of the same flower.
    • Geitonogamy – Transfer of pollen grains from the anther to the stigma of the different flower of same plant.

    Cross pollination: Transfer of pollen grains from the anther to the stigma of the different flower of a different plant ( or ) fertilization in the different plant. It is divided into two factors, these factors are also known as agents of pollination:

    • Abiotic factors – pollination done by natural occurrences. for example- Wind and Water.
    • Biotic factors – pollination done by living beings. for example- Ants, snakes, bats, insects and birds, etc.

    Furthermore, Abiotic factors are divided into two types, they are:

    • Anemophily: It refers to the pollination brought about by wind.
    • Hydrophily: It refers to the pollination brought about by water.

    Biotic factors are divided into four types( major ), they are:

    • Entomophily: It refers to the pollination brought about by insects.
    • Chiropterophily: It refers to the pollination brought about by bats.
    • Malacophily: It refers to the pollination brought about by snails.
    • Ornithophily: It refers to the pollination brought about by birds.

    Agents Of pollination

    • Myrmecophily: It refers to the pollination brought about by Ants. for example- Medicago sativa, Melitotus officinalis.
    • Elephophily: It refers to the pollination brought about by elephants. for example- Rafflesia
    • Ophiophily: It refers to the pollination brought about by snakes. for example- Arum.
    • Anemophily: Poplar, beech, oak, alder, chestnut, willow, maize, oats, rice and nettle.
    • Hydrophily: Vallisneria and Zostera
    • Entomophily: Rose, Jasmine, Salvia, Cestrum, Bougainvillea, Sunflower.
    • Chiropterophily: Adansonia, kigellia, bauhinia, anthouphalus etc.
    0
    2021-07-31T15:08:56+00:00

    \small\text \green{Pollination \:  \:  is \:  \:  the \:  \:  transfer \:  \:  \:  of  \:  \:  \: pollen} \\  \small\text\green{from \:  \:  \:  a male \:  part of a plant to a female} \\  \small\text\green{part \:  \:  \:  \:  \:  of \:  \:  \:  a  \:  \:  \:  \: \:  plant,  \:  \:  \:  \:  \: later \:  \:  \:  \:  \:  enabling} \\  \small\text\green{fertilisation and the production of seeds,} \\  \small\text\green{most often by an animal or by wind. \:  \:  \:  \:  \:  \:  \: }

     \\

     \large \text{\fcolorbox{red}{blue}{Types of Pollination}}

     \text{ \:  \:  \:  \:  \:  \:  \:  \: 1.  \:  \red{Self- Pollination}} \\ \text{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 2. \:   \red{Cross-Pollination}}

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