Unformatted text preview: food. The food reserve necessary for germination is stored in the endosperm, mainly as starch . When the grain absorbs water, enzymes are activated. These enzymes digest the starch in the endosperm to soluble sugar. The cotyledon absorbs the sugar and passes it to the rapidly growing radicle and shoot. region of attachment to stalk position of plumule position of radicle endosperm fruit wall and testa cotyledon plumule radicle Wheat grain (a) external appearance (b) longitudinal section plumule more conspicuous beneath fruit wall radicle emerges fruit wall splits plumule in sheath (coleoptile) first leaf coleoptile breaks open roots root hairs Germination of wheat more roots appear © D.G. Mackean 5 Wheat...
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- Fall '11
- Plants, Plant morphology, Testa, fruit wall, wheat grain