The meaning of MICROPYLE is a minute opening in the integument of an ovule of a seed plant.

Why Does the United States Have More Tornadoes than Any Other Country? …a small opening called the micropyle at the top. In angiosperms the presence of two integuments is plesiomorphic (unspecialized), and one integument is apomorphic (derived).

The micropyle is the pore or canal within one or more integuments through which (in angiosperms) a pollen tube traverses prior to fertilization. (In nonangiospermous seed plants, the micropyle receives pollen grains directly.)

Primarily, the hilum and micropyle differ in the fact that the hilum is an elliptical scar on seeds marking the point of contact of attachment of the funicle, while the micropyle is the small opening of the hilum wherein the pollen tube passe through before fertilisation.

2017年5月15日 · The main difference between hilum and micropyle is that hilum is an elliptical scar on the seed, which marks the point of attachment of the funicle whereas micropyle is the small end of the hilum in which the pollen tube go through prior to fertilization.

The term “micropyle” refers to a tiny opening or pore in the seed coats of certain plants. It is an essential structure that allows for the entry of water, gases, and sometimes pollen during the process of germination.

A micropyle is a small opening or pore in the outer covering of a plant ovule or a seed, through which a sperm cell can access the egg for fertilization. In fish and insect eggs, it is a tiny opening allowing the sperm to enter and fertilize the egg. Etymology: [Micro- …

(1) An opening in the membrane of the eggs of insects, arachnids, some mollusks, fishes, and a number of other animals, through which the spermatozoon penetrates. (2) An opening in the apex of the ovule in higher seed plants, through which the pollen tube penetrates during pollination.

micropyle a small canal in the integument surrounding the ovule of a flowering plant, through which the POLLEN TUBE usually enters the ovule on the way to the EMBRYO SAC. Water enters the seed via the micropyle prior to GERMINATION.

micropyle The small channel that remains between the tips of the integuments at the apex of the ovule. The pollen tube usually enters the nucellus via the micropyle prior to fertilization.