What is Homomorphic Self-incompatibility? – Definition?
In homomorphic self incompatibility, all the flowers have exactly the same structure. Self-fertilization inhibition depends on genetic or biochemical or physiological mechanisms. It has immense importance in crop plants.
It can operate in various ways like
- Pollen grain does not germinate on the stigma of same flower
- Even if germination occurs, germinated pollen cannot penetrate the stigma
- If penetrates, pollen tube growth retardation or very slow rate of pollen tube growth
- No release of male gametes from the pollen tube having normal growth.
There are two quite different types of homomorphic self-incompatibility. Generally, each plant possesses only one of these two.
- Sporophytic self-incompatibility – in short form written as SSI
- Gametophytic self-incompatibility – in short form written as GSI
Visit page heteromorphic self incompatibility, the another type of incompatibility.