The transfer of pollens can take place through butterflies, honey bees, wind etc.
Pollination is the act of movement of pollen grains from the male reproductive part of a flower to the stigma, which is the female reproductive part. The transfer of pollens can take place through butterflies, honey bees, wind etc.
The categorisation of pollination is based on the method of movement of pollen grains from flower to flower. There are primarily two kinds of pollination –
In self-pollination, pollen grains remain within the flower as it moves from its anther to stigma. However, in cross-pollination, presence of a vector is required, and the grains are transferred from one flower to another. The vectors can be air, insects or birds. Advancement in science has also allowed artificial pollination by man, especially for pollinating palm trees. This aspect goes on to explain how the process of pollination is different from fertilisation.
(images will be uploaded soon) Process of pollination, as mentioned, also reflects the point of distinction according to the difference between pollination and fertilisation Class 10.
While insects may appear to be insignificant, they act as the primary pollinator agents. Around 200,000 – 300,000 invertebrate species like beetles, butterflies, moths, mosquitoes, flies, bees spread pollens between thousands of trees. Close to 2000 vertebrate species like mammals, birds and reptiles also act as pollinator agents. Among all these agents, the little honeybee is the most important one!
Plant fertilisation includes a fusion of male gametes (originating in the pollen tube of a flower) with the ovum (the female gamete). Fertilisation within a flower is necessarily preceded by pollination.
The steps and outcome of the process of plant fertilisation include the difference of pollination and fertilisation. Refer to the following points to differentiate between pollination and fertilisation.
(a) Allowing pollen movement from stigma to ovary for plant fertilisation (b) Attracting pollination agents (c) Producing nectar from pollen (d) Protecting movement from anther to stigma Ans. (a) Allowing pollen movement from stigma to ovary for plant fertilisation
(a) Pollen (b) Stamen (c) Bees only (d) Petals Ans. (a) Pollen
Ans. No. These are not the same things. If one considers how is pollination different from fertilisation – distinction lies in function undertaken through the two processes.
Ans. The major difference between pollination and fertilisation is the different stages that these indicate in plant fertilisation. Pollination is an initial stage in pollen transfer, and fertilisation takes place after successful pollination.
Ans. Pollination is transfer of pollen grains from a flower’s male anther to female stigma. It is critical in the process of plant reproduction. There is a fundamental difference between pollination and fertilisation in plants.
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Male gametes are transferred to ovum through pollen tube
First step to fertilisation where pollens reach from Anther to Stigma
Zygote formation which divides to form an embryo
External mechanism of transfer of pollen grains
Internal mechanism of male gamete and female ovum fusion
Self-Pollination and Cross-Pollination
External pollination agents include bees, birds, wind etc.