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प्रश्न
Incompatibility is a natural barrier in the fusion of gametes. How will you explain this statement?
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उत्तर
- Incompatibility refers to the inability of certain gametes, even from genetically similar plant species, to fuse with each other.
- It is considered the most prevalent and effective device to avoid inbreeding and outbreeding.
- Pollen-pistil interaction is a dynamic process that involves pollen recognition followed by promotion or inhibition of the pollen.
- Chemical substances released by the style act as a barrier.
- Typically the pollen belonging to the correct mating type germinates on the stigma, develops a pollen tube, and brings about fertilization.
- The pollens belonging to the other mating type are discarded.
Thus, incompatibility is a natural barrier in the fusion of gametes.
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संबंधित प्रश्न
Very short answer type question:
Name the part of gynoecium that determines the compatible nature of pollen grain.
Give an account of pollen pistil interaction in detail.
Identify the process represented in the following diagram.
Which of the following induces pollen germination and tube growth in vitro?
Fill up the blanks with suitable words and select the correct option.
The ability of the pistil to recognize pollen is dependent on ____________ components and ____________ guide the entry of pollen tube. This study leads to help ____________ in getting ____________ even in ____________.
p. Chemical
q. Plant breeders
r. Hybrids
s. Incompatible pollination
t. Synergids
Following are the diagrams of entry of pollen tube into ovule. Identify the type A and B.
In angiosperms, pollen tube liberates their, male gametes into the ______.
The compatibility and incompatibility of the pollen-pistil interaction is determined by ______.
In angiosperms normally on the surface of stigma only ______ pollens germinate successfully.
All are events of pollen-pistil interaction EXCEPT ______
