what is pollen pistil interaction? describe in detail
Asked by gganga | 21st Jun, 2018, 07:18: PM
- Pollen-pistil interaction is a sequence of events that occur from the time of pollen deposition over the stigma till the time of entry of pollen tube inside the ovule.
- The process has checks at several places for the promotion or inhibition of pollen growth.
- It is helpful to the plant breeders in manipulating pollen growth even in incompatible cases.
- It is a safety measure to ensure that illegitimate crossings do not take place.
- Compatibility and incompatibility of the pollen-pistil is determined by special proteins.
- Compatible pollens absorb water and nutrients from the surface of stigma, germinate and produce pollen tube.
- Pollen tube grows into the style whose growth and path is determined by specific chemicals.
Entry of Pollen tube into the Embryo sac
- The fully developed embryo sac consists of 3 antipodal cells, 2 synergids, 1 egg cell and 1 secondary nucleus.
- The pollen tube pierces through the nucellus and ultimately, penetrates the wall of the embryo sac.
- The tip of the pollen tube disintegrates and the 2 male gametes are liberated in the embryo sac.
- One or both the synergids which help in directing the pollen tube towards the egg disintegrates
Answered by Sivanand Patnaik | 22nd Jun, 2018, 08:31: AM
- Help in this question..
- Plz solve this
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