Double fertilization was first described bya)Nawaschinb)Dacandolec)Robert Brownd)StrasburgerCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

The fusion of one sperm with the egg cell to form the embryo and of the other sperm with the polar fusion nucleus to give rise to the endosperm ('double fertilization') was discovered by Nawaschin in 1898 in the liliaceous plants, Lilium martagon and Fritillaria tenella.the fertilization process characteristic of flowering plants, in which one sperm cell of a pollen grain fertilizes an egg cell while a second fuses with two polar nuclei to produce a triploid body that gives rise to the endosperm.

Answer

Nawasin double fertilization
strasburger syngamy

Answer

Sergei nawaschin was described first double fertilization in 1898. In the liliaceous plant, lilium maratagon and firtilaria tenella.
So option ' A ' is correct answer.

Answer

Double Fertilization:
Double fertilization is a unique process that occurs in angiosperms (flowering plants) in which two sperm cells fertilize two different cells within the female reproductive structure, the ovule. This process leads to the formation of two distinct structures, the embryo and the endosperm, which provide nourishment to the developing embryo.

Discovery of Double Fertilization:
The phenomenon of double fertilization was first described by Eduard Strasburger, a German botanist, in the late 19th century. However, the credit for the initial discovery of double fertilization goes to Sergei Gavrilovich Navashin, a Russian botanist.

Sergei Gavrilovich Navashin:
Sergei Gavrilovich Navashin (also spelled as Nawaschin) was a prominent Russian botanist who made significant contributions to the field of plant reproductive biology. In 1898, Navashin published his groundbreaking research on the process of double fertilization in the lily Lilium martagon.

The Experiment:
Navashin meticulously studied the fertilization process in lilies and found that two sperm cells were involved in the fertilization of the ovule. One sperm cell fused with the egg cell to form a zygote, which subsequently developed into an embryo. The other sperm cell fused with two polar nuclei to form a triploid cell, which later developed into the endosperm.

Confirmation by Strasburger:
After Navashin's initial discovery, Eduard Strasburger, a well-known German botanist, independently confirmed the phenomenon of double fertilization in various flowering plants. He published his findings in 1901, which further solidified the understanding of double fertilization in angiosperms.

Significance of Double Fertilization:
Double fertilization plays a crucial role in the reproductive success and evolutionary advantage of angiosperms. The formation of endosperm provides a nutrient-rich tissue that supports the development of the embryo. This unique process has contributed to the diversification and success of angiosperms, making them the most dominant and diverse group of plants on Earth.

In conclusion, double fertilization was first described by Sergei Gavrilovich Navashin, a Russian botanist, in his research on lilies. Eduard Strasburger later independently confirmed and expanded upon this discovery. Double fertilization is a fundamental process in angiosperms, enabling the development of both the embryo and the endosperm, which are critical for the reproductive success of flowering plants.

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