What do you understand by polyembryony? Describe its causes and import

1.	What do you understand by polyembryony? Describe its causes and importance.
Answer» Occurrence of more than one embryo in a seed is referred to as polyembryony. Polyembryony was discovered by Leeuwenhoek in 1719. It is mostly found in gymnosperms and less found in angiosperms (eg. Mango, lemon etc.). it is of two types– true polyembryony and false polyembryony. Causes of polyembryony are as follows– (1) When more than one embryosac in ovule; (2) When more than one egg cell in embryosac; (3) When after fertilization, egg is separated in many small parts and every part forms a embryo; (4) When any cell of embryosac forms embryo; (5) When embryo is formed by outer cells of embryosac. Importance of polyembryony are– (a) It is very important for horticulture scientists. (b) By this same types of plants may be formed. (c) Characters of mother plants are present in daughter plants.

What do you understand by polyembryony? Describe its causes and importance.

Answer»

Occurrence of more than one embryo in a seed is referred to as polyembryony. Polyembryony was discovered by Leeuwenhoek in 1719. It is mostly found in gymnosperms and less found in angiosperms (eg. Mango, lemon etc.). it is of two types– true polyembryony and false polyembryony.

Causes of polyembryony are as follows–

(1) When more than one embryosac in ovule;

(2) When more than one egg cell in embryosac;

(3) When after fertilization, egg is separated in many small parts and every part forms a embryo;

(4) When any cell of embryosac forms embryo;

(5) When embryo is formed by outer cells of embryosac.

Importance of polyembryony are–

(a) It is very important for horticulture scientists.

(b) By this same types of plants may be formed.

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