SEEDs Flashcards
seeds that are made out of a single (mono) embryonic leaf or cotyledon
Monocot seeds
seeds with two embryonic leaves and cotyledons
Dicot seeds
become non-endospermous or exalbuminous; source of food is the cotyledon
Dicot
retain endosperm as source of food
Monocot
Modes of Seed Dispersal
Autochory
Allochory
Autochory
Barochory – gravity
Boleoautochory – squeezing/popping
Herpautochory - by trichomes
Allochory
Anemochory
Hydrochory
Zoochory
the system by which animals disperse seeds through the direct consumption of fruits
Endozoochory
seed dispersal by ants
Myrmemochory
seed dispersal by birds
Ornithochory
seed dispersal by bats
Chiropterochory
seed dispersal by molluscs
Malacochory
seed dispersal by humans
Anthropochory
extends above the cotyledon(s), is composed of the shoot apex and leaf primordia;
epicotyl
which is the transition zone between the shoot and root; and the radicle
hypocotyl
is a tiny plant that has a root, a stem, and one or more leaves
embryo
is the nutritive tissue of the seed, often a combination of starch, oil, and protein.
endosperm
an embryonic leaf in seed-bearing plants, one or more of which are the first leaves to appear from a germinating seed.
cotyledon
outer covering of a seed
help protect the embryo from injury and also from drying out
seed coat
the shoot or bud of a plant embryo or seedling that is located between the cotyledons and grows into the stem and leaves.
plumule
tissue that surrounds and nourishes the embryo in the seeds of angiosperms (flowering plants). In some seeds the endosperm is completely absorbed at maturity (dicots)
endosperm
a protective layer of tissue that surrounds the radicle (the embryonic primary root) in monocotyledon seeds
coleorhiza
pointed protective sheath covering the emerging shoot in monocotyledons such as grasses in which few leaf primordia and shoot apex of monocot embryo remain enclosed.
Coleoptile
scar on seed that controls the content of water in seeds during the last phase of the formation of seeds
only in dicots
hilum
