Botany lecture notes

Difference between Self Pollination and Cross Pollination – Comparison Table


Compare self pollination and Cross pollination

Self-Pollination vs Cross Pollination
(Similarities and Differences between Self Pollination and Cross Pollination)

Pollination is a process in sexual reproducing plants by which the pollen grains from the anther is transferred to the stigma of the gynoecium and thereby enable fertilization. Pollination is an essential step for sexual reproduction in seed plants (Spermatophytes – Gymnosperms and Angiosperms) to produce the seeds. In plants (typically in Angiosperms), the pollination and the completion of sexual reproduction can be achieved by two methods – Self-pollination and Cross-pollination.

Self-pollination: Pollen from the anther of a flower is deposited on the stigma of the same flower or a different flower of the same plant.

Cross-pollination: Pollen from the anther of a flower is deposited on the stigma of a flower borne on another plant of the same species.

Nature favor cross-pollination since, it enables a better chance for creating variability in the progenies. Moreover, in order to prevent self-pollination, plants have evolved several structural and genetic methods such as the production of unisexual flowers, the positioning of male and female parts to avoid self-pollination, self-incompatibility and maturation of male and female parts in different types (protandry and protogyny).

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Botany lecture notes

Difference between Asexual and Sexual Reproduction – Comparison Table


sexual vs asexual reproduction

Asexual Reproduction vs Sexual Reproduction
(Similarities between Sexual and Asexual Reproduction)

Reproduction is a biological process by which new individuals (progenies) are formed from their parents. There are two types of reproductions in organisms: sexual reproduction and asexual reproduction.

asexual reproduction in yeastAsexual reproduction: A method of reproduction, usually present in lower animals and plants where progenies are produced from a single parent without the formation of gametes and fertilization. Example: division of bacteria by binary fission, budding of Hydra and yeasts, and vegetative reproduction in plants.

Sexual reproduction: A method of reproduction where the progenies are produced by two parents of separate sexes. These parents produce morphologically and sexually different gametes. The union of gametes results in the formation of zygote. The zygote develops into new progeny.

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