what is structure of the seed
Answers
Answer:
The seed consists of three components: embryo, endosperm (sometimes perisperm), and seed-coat. Both endosperm and embryo are the products of double fertilization, whereas the seed-coat develops from the maternal, ovular tissues. The seed habit is a significant advancement in the evolution of higher plants.
Structure of Seed:
The various parts of a seed may be easily studied after it has been soaked in water for a day or so varying according to the nature of the seeds.
A mature seed contains an embryonic plant (with a radicle and plumule), and is provided with reserve food materials and protective seed coats.
A mature pod of pea (Pisum sativum) has a number of seeds arranged in two rows.
The seeds are attached to the fruit wall by a small stalk, the funiculus.
At maturity, on one side of the seed coat a narrow, elongated scar representing the point of attachment of seed to its stalk is distinctly seen, this is the hilum.
Close to the hilum situated at one end of it there is a minute pore, micropyle.
During seed germination, water is absorbed mainly through this pore, and the radicle comes out through it.
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