Plant Reproduction: Pollination and Seed Dispersal Mechanisms
Explore the fascinating world of plant reproduction through pollination and seed dispersal mechanisms. Learn about the different types of pollination, such as self-pollination and cross-pollination, and the importance of fruit and seed dispersal. Discover how plants use various strategies to ensure successful reproduction, from attracting pollinators to dispersing their seeds effectively.
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Fruit and Seed dispersal
Fruit and Seed dispersal 1- Anemochory. 2- Autochory. 3- Hydrochory. 4- Myrmeco-chory. 5- Zoochory: general dispersal by animals, here there are two ways: A- Exozoic:. B- endozoic.
Plant reproduction Sexual reproduction in seeded plants: A/Pollination :- It is the transfer of pollen grains from microsporangia to the ovule or stigma. There are two types of pollination 1- Self-pollination: It is the transfer of pollen from the stamens to the stigma in the same flower. This type of pollination happened in the following: A- Hermaphrodite flowers B- Cleistogamus flowers as in Avena 2- Cross-pollination
Mechanisms favouring cross- pollination 1- Being dioecious 2- Being monoecious 3- The maturation of anthers and stigmas in different times 4- In heterostyled flowers 5- In self-incompatible flowers
B/Fertilization Inbreeding (also called selfing): Outbreeding(also called outcrossing or allogamy): Allautogamy( means have both outcrossing and selfing flowers )
Kinds or agencies of pollination in Angiosperm plants:- Animal pollination Types of animal pollination: Insect pollination (entomophily) A- Bee pol B- Butterfly pol. C- Beetle pol. Bat pol. 1. 2. Wind pollination Water pollination
