Question

Nucellar polyembryony is reported in species of:
a. Citrus
b. Gossypium
c. Triticum
d. Brassica

Answer 1

Hint: Some of the nucellar cells which are surrounding the sac of the embryo get started to divide in nucellar polyembryony. And then it projects into the embryo sac and matures into numerous numbers of embryos. In such kinds of fruits, each ovule contains many embryos. Polyembryony is the phenomenon in which there is an Occurrence of more than one embryo in a seed.

Complete answer:
The Nucellar polyembryony is the process in which an apomictic procedure is involved where many tenderly consequent embryos stand up from the nucleus and surround the emerging zygotic embryo. Thus, we can say that nuclear polyembryony is observed in the members of the citrus family.

However, Gossypium is a genus of herbs or shrubs of the family called Malvaceae. It is responsible for yielding the cotton for trade purposes. They are having frequent palmately lobed shrubberies, impressive flowers, and capsular fruits comprising long-tailed seeds.

The species turanicum which is also called Triticum turanicum is a tetraploid species of wheat. It is an antique grain type. Brassica is categorized in the mustard family. The members of this genus are unceremoniously known as cruciferous cabbages, vegetables, or mustard plants. They do not have the process of Nucellar polyembryony in them.

Hence, the correct answer is option (A).

Note: We can say that the process of Nucellar polyembryony includes the formation of a seed in which the nucellar cells that are extant in the embryo get to divide and procedure many more embryos. These are the meticulous clones of the parentage cells as these are molded from the pre-existing nucellar cells. As we already know, the Citrus fruits exhibit polyembryonic seed development.