Lab 6 Flashcards
pistil
female reproductive organ of a flower, typically comprising the stigma, style, and ovary
ovary
part of the pistil that contains ovules and develops into a fruit after fertilization
carpel
basic unit of the female reproductive organ in flowering plants, consisting of the ovary, style, and stigma
ventral suture
seam or line along the ventral side of the ovary where it splits open during fruit maturation
dorsal suture
seam or line along the dorsal side of the ovary where it splits open during fruit maturation
septum
partition within the ovary that separates the locules
seed
mature ovule containing the embryonic plant, stored food (endosperm or perisperm), and protective covering (seed coat)
endosperm seed
seed containing endosperm, a tissue that provides nutrients to the developing embryo
non-endospermic seed
seed lacking endosperm; nutrients for the developing embryo come from the cotyledons or perisperm
perispermic seed
seed where the primary nutrient storage tissue is perisperm, which surrounds the embryo
seed coat
protective outer covering of a seed
aulerone layer
layer of protein-rich cells in the seed that provides nutrients to the developing embryo
endosperm
nutrient-rich tissue surrounding the embryo in many seeds, formed by the fusion of sperm and central cell nuclei during double fertilization
separation and secretion zone
region in the ovary where cells separate during fruit development and secretion of substances occurs
embryo
early stage of development of a multicellular organism, typically contained within a seed
suspensor
structure in the embryo of a plant that anchors it to the surrounding tissue and provides nutrients
cotyledon
seed leaf of a plant embryo, which typically stores and provides nutrients to the developing seedling
plumule
embryonic shoot located above the cotyledons in the seed
epicotyl
portion of the plant embryo above the cotyledon(s) and below the first true leaves
hypocotyl
portion of the plant embryo below the cotyledon(s) and above the root
radicle
embryonic root of a plant embryo that emerges first during germination to anchor the plant and absorb nutrients from the soil
scutellum
specialized cotyledon found in grass seeds that absorbs nutrients from the endosperm to nourish the developing embryo
epiblast
a small flap-like outgrowth; formed by the remains of the second cotyledon which is not truly developed in monocots
coleoptile
protective sheath covering the young shoot tip in grasses, aiding in the emergence of the shoot through the soil
coleorhiza
protective covering surrounding the young root tip in grasses, facilitating the emergence of the root through the soil
fruit
mature ovary of a flowering plant, containing seeds and often developing from the fertilized ovary
pericarp
wall of a fruit, consisting of three layers: exocarp, mesocarp, and endocarp
exocarp
outermost layer of the pericarp, often providing protection and sometimes contributing to fruit texture
mesocarp
middle layer of the pericarp, often containing nutrients and contributing to fruit texture
endocarp
innermost layer of the pericarp, often surrounding the seed and providing protection
simple fruit
fruit formed from a single ovary
accessory fruit
fruit formed from tissues other than the ovary, such as receptacle or floral parts
dry dehiscent fruit
fruit that splits open at maturity to release seeds
dry indehiscent fruit
fruit that does not split open at maturity to release seeds
succulent fruit
fleshy fruit with a high water content, often consumed by animals for dispersal
caryopsis
dry, one-seeded fruit where the seed coat is fused to the pericarp
silique
type of dry fruit characteristic of the mustard family, consisting of two fused carpels that split open to release seeds
pericarp fused with seed coat
fruit where the pericarp is tightly attached or fused with the seed coat, often seen in caryopsis-type fruits
