Types of Pollination: Autogamy and Geitonogamy
Detailed study of self-pollination mechanisms including autogamy (within the same flower) and geitonogamy (between flowers on the same plant).
What is Types of Pollination: Autogamy and Geitonogamy?
The transfer of pollen grains from the anther to the stigma of the same flower.
Key points
- Define and differentiate between autogamy and geitonogamy.
- Explain the conditions necessary for autogamy.
- Understand the genetic and ecological implications of geitonogamy.
- Identify mechanisms that promote or prevent self-pollination.
Common exam trap
Confusing geitonogamy with cross-pollination due to the involvement of a pollinating agent.
Definitions
- Term
Autogamy
- Meaning
The transfer of pollen grains from the anther to the stigma of the same flower.
- Term
Geitonogamy
- Meaning
The transfer of pollen grains from the anther of one flower to the stigma of another flower located on the same plant.
- Term
Self-pollination
- Meaning
The transfer of pollen grains from the anther to the stigma of the same flower or another flower on the same plant.
- Term
Bisexual flower
- Meaning
A flower that contains both male (androecium) and female (gynoecium) reproductive organs.
- Term
Cleistogamy
- Meaning
A type of pollination where flowers remain closed, ensuring self-pollination.
Learning objectives
Define and differentiate between autogamy and geitonogamy.
Explain the conditions necessary for autogamy.
Understand the genetic and ecological implications of geitonogamy.
Identify mechanisms that promote or prevent self-pollination.
Prerequisites
Structure of a flower (stamen, pistil, anther, stigma).
Basic understanding of plant reproduction.
Concept of gametes.
Common mistakes
Confusing geitonogamy with cross-pollination due to the involvement of a pollinating agent.
Assuming all bisexual flowers automatically lead to autogamy without considering maturation timing.
Not distinguishing between the genetic and ecological aspects of geitonogamy.
Keywords
Pollination
Autogamy
Geitonogamy
Self-pollination
Bisexual flower
Cleistogamy
Dichogamy
Plant Reproduction
Practice preview
Geitonogamy is a type of pollination where pollen grains are transferred from the anther to the stigma of:…
easy
Which of the following is a mechanism that ensures self-pollination?…
easy
In a plant species, if the stigma matures much earlier than the anthers, this condition is known as:…
medium