AGENTS OF POLLINATION SEXUAL REPRODUCTION IN FLOWERING PLANTS BY R M THORAT

Описание: #ultimatebiologyRMTHORAT#AGENTSOFPOLLINATIONSEXUALREPRODUCTIONINFLOWERINGPLANTS#SEXUALREPRODUCTIONINFLOWERINGPLANTS #NEET2020
IN THIS VIDEO WE WILL LEARN ABOUT AGENTS OF POLLINATION AND DETAILS OF ANEMOPILOUS FLOWERS
1. Agents of Pollination : Plants use two abiotic (wind and water) and one biotic (animals) agents to
achieve pollination.
2. Majority of plants use biotic agents for pollination. 3.Only a small proportion of plants use abiotic
agents. Pollen grains coming in contact with the stigma is a chance factor in both wind and water
pollination.
3. To compensate for this uncertainties and associated loss of pollen grains, the flowers produce
enormous amount of pollen when compared to the number of ovules available for pollination.
4.Pollination by wind is more common amongst abiotic pollinations. Wind pollination also requires
that the pollen grains are light and non-sticky so that they can be transported in wind currents. 5.They often possess well-exposed stamens (so that the pollens are easily dispersed into wind
currents, and large often-feathery stigma to easily trap air-borne pollen grains.
6.Windpollinated flowers often have a single ovule in each ovary and numerous flowers packed into
an inflorescence; a familiar example is the corn cob – the tassels you see are nothing but the
stigma and style which wave in the wind to trap pollen grains. Wind-pollination is quite common in
grasses.

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   • STRUCTURE OF OVULE- MEGASPORANGIUM SEXUAL ...  (LINK OF OVULE/MEGASPORANGIUM)
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   • DOUBLE FERTILISATION AND TRIPLE FUSION (SE...  (LINK OF DOUBLE FERTILISATION AND TRIPLE FUSION)
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   • GYNOECIUM THE PISTIL SEXUAL REPRODUCTION I...   (GYNOECIUM/THE PISTIL)
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   • Pollination Sexual Reproduction In Floweri...   (pollination)
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   • POST FERTILIZATION CHANGES IN FLOWER - SEX...   (post fertilisation changes in flower)