Advertisements
Advertisements
प्रश्न
Give an account of polyembryony.
Advertisements
उत्तर
Polyembryony:
- Polyembryony is the occurrence of more than one embryo in a seed which consequently results in the emergence of multiple seedlings.
- The additional embryos result from the differentiation and development of various maternal and zygotic tissues associated with the ovule of the seed.
- In adventive polyembryony, an embryo develops directly from the diploid cell of nucellus and integuments as in Citrus.
- In cleavage polyembryony, zygote proembryo sometimes divides (cleaves) into many parts or units. Each unit then develops into an embryo.
APPEARS IN
संबंधित प्रश्न
Why are some seeds referred to as apomictic seeds?
Define Apomixis.
State what is apomixis. Write its significance. How can it be commercially used?
Fill in the blank:
________takes place when one male gamete and the egg fuse together. The fertilized egg grows into a seed from which the new plants can grow.
Fill in the blank:
The ______ is the base of the flower to which other floral parts are attached.
Fill in the blank:
________is the transfer of pollen grains from the anther of the flower to the stigma of the same or a different flower
Fill in the blanks:
The ______ are coloured to attract the insects that carry the pollen. Some flowers also produce ______ or ______ that attracts insects.
The polyembryony commonly occurs in ______.
Explain following term:
Polyembryony
What is the origin of embryos in Aristolochia according to embryo sac cell types?
