. Elements of Philippine agriculture. Agriculture. CHAPTER II THE SEED Parts of the Seed. A seed is a reproductive structure, composed of the embryo, seed coats, and sometimes an endosperm. Embryo. The embryo is the young plant, in the seed. Its parts are the radicle, the cotyledons, and the plumule. The radicle becomes the root of the plant, and the plu- mule becomes the shoot. Seed Coats. The seed coats consist of an outer coat and an inner coat, and are to pro- tect the embryo. The outer coat, called the testa, is always hard; the inner coat is called the teg- men. In some seeds the inner a
. Elements of Philippine agriculture. Agriculture. CHAPTER II THE SEED Parts of the Seed. A seed is a reproductive structure, composed of the embryo, seed coats, and sometimes an endosperm. Embryo. The embryo is the young plant, in the seed. Its parts are the radicle, the cotyledons, and the plumule. The radicle becomes the root of the plant, and the plu- mule becomes the shoot. Seed Coats. The seed coats consist of an outer coat and an inner coat, and are to pro- tect the embryo. The outer coat, called the testa, is always hard; the inner coat is called the teg- men. In some seeds the inner and the outer coats cannot be sep- arated. There is a hole through the seed coats called the micro- pyle, by which water can enter the seed. Through this hole the radicle comes when the seed germinates, or begins to grow. Endosperm. Some seeds, such as the seed of the coconut palm, and of maize, contain a store of food outside the em- bryo, but inside the seed coat; this part of the seed is called. cotyledons Fig. 9. Parts of a seed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Copeland, Edwin Bingham, 1873- [from old catalog]. Yonkers-on-Hudson, N. Y. , and Manila, World book company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
