Draw the labeled diagram of the following:
(i) Gram seed
(ii) V.S. of maize seed
Draw the labeled diagram of the following:
(i) Gram seed
(ii) V.S. of maize seed
(i)Gram seed: It is a dicotyledonous seed formed inside a small pod or legume. The seed is covered by two seed coats: testa (outer seed coat) and tegmen (inner seed coat). The embryo is enclosed by the seed coats. The embryo contains a short and straight embryo axis which is pressed between two large cotyledons, attached by short stalks. The micropylar end of the embryo axis has a radicle that forms the future roots. The other end of the embryo axis is the plumule which gives rise to shoots. The food is stored in the cotyledons. The hilum is the point where the stalk of the seed is attached.
Figure: Gram seed
(ii)Maize seed: It is a monocotyledonous seed comprising five main parts. The seed has a protective covering known as a seed coat. Below the seed coat, embryo and endosperm are present. The endosperm is bulky and consists of reserve food material. The embryo and endosperm are separated by a proteinaceous layer called the aleurone layer. The embryo consists of a plumule, radicle, and a single cotyledon. The plumule is enclosed in a sheath called coleoptile from which the first leaf germinates during germination. The radicle is enclosed in a sheath called coleorhiza from which forms the first roots.
(i)Gram seed: It is a dicotyledonous seed formed inside a small pod or legume. The seed is covered by two seed coats: testa (outer seed coat) and tegmen (inner seed coat). The embryo is enclosed by the seed coats. The embryo contains a short and straight embryo axis which is pressed between two large cotyledons, attached by short stalks. The micropylar end of the embryo axis has a radicle that forms the future roots. The other end of the embryo axis is the plumule which gives rise to shoots. The food is stored in the cotyledons. The hilum is the point where the stalk of the seed is attached.
Figure: Gram seed
(ii)Maize seed: It is a monocotyledonous seed comprising five main parts. The seed has a protective covering known as a seed coat. Below the seed coat, embryo and endosperm are present. The endosperm is bulky and consists of reserve food material. The embryo and endosperm are separated by a proteinaceous layer called the aleurone layer. The embryo consists of a plumule, radicle, and a single cotyledon. The plumule is enclosed in a sheath called coleoptile from which the first leaf germinates during germination. The radicle is enclosed in a sheath called coleorhiza from which forms the first roots.
