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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Corn
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excellent example of monocot seed
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pericarp
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outer most tissue of the monocot seed
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protection
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caryopsis
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one-seeded fruit; pericarp hardens and fuses with seed to become this;A small, dry, one-seeded fruit of a cereal grass, having the fruit and the seed walls united
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seed
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mature ovule
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testa or seed coat
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interior to the pericarp/caryopsis
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protection
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aleurone
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outer layer of the endosperm; functions to secrete enzymes; A granular protein found in the endosperm of many seeds or forming the outermost layer in cereal grains
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endosperm
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comprises 70 to 80% of volume or weight of a monocot seed and is composed mainly of starch to store energy
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composed mainly of starch to store energy
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scutellum
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cotyledon; secretes enzymes and is active in absorbing and translocating energy materials to the embryo axis
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dent in seed
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indention that forms as the seed dries down
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indicates harvest maturity
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embryo in monocot seed:
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coleoptile
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sheath that encloses the plumule; A protective sheath enclosing the shoot tip and embryonic leaves of grasses
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protect the shoot during emergence
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plumule
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stem tissue above the scutellar node; composed of stem, leaves and growing point
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radicle
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embryonic root
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functions as primary root system for the first 4-6 weeks until the secondary root system develops
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coleorhiza
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sheath that encloses the radicle
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protects the seed during radicle emergence against pathogenic invasion of microorganisms
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tip
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point of attachment of the seed to the ear/cob and a black layer indicates physiological maturity
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mesocotyl
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found only in monocots; stem tissue between the points of attachment of the scutellum and coleoptile; is considered to be partly hypocotyl and partly cotyledon;functions in elongation to cause emergence and internode elongation
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