Term
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Definition
| a term describing any plant organ that grows in an atypical location, such as roots growing from stems. prop roots growing from a corn stalk |
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Term
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Definition
| a plant hormone that slows down growth, often antagonizing actions of growth hormones. two of its many effects are to promote seed dormancy and facilitate drought tolerance |
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Term
| Alternation of generations |
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Definition
A life cycle in which there is both a multicellular diploid
form, the sporophyte, and a multicellular haploid form, the gametophyte; characteristic of
plants. |
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Term
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Definition
A flowering plant, which forms seeds inside a protective chamber called
an ovary. The ovary often develops into the fruit. |
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Term
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Definition
In plants, the male gametangium, a moist chamber in which gametes
develop. |
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Term
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Definition
A flowering plant that completes its entire life cycle in a single year or growing
season. |
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Term
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Definition
In an angiosperm, the terminal pollen sac of a stamen, where pollen grains with
male gametes form. |
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Term
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Definition
Concentration of growth at the tip of a plant shoot, where a terminal
bud partially inhibits axillary bud growth. Driven by competition for light. |
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Term
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Definition
Embryonic plant tissue in the tips of roots and in the buds of shoots
that supplies cells for the plant to grow in length. |
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Term
| Archegonium: (plural, archegonia) |
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Definition
In plants, the female gametangium, a moist chamber
in which gametes develop. |
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Term
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Definition
A term that primarily refers to indoleacetic acid (IAA), a natural plant hormone
that has a variety of effects, including cell elongation, root formation, secondary growth,
and fruit growth. |
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Term
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Definition
A structure that has the potential to form a lateral shoot, or branch. The
bud appears in the angle formed between a leaf and a stem. |
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Term
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Definition
| A flowering plant that requires two years to complete its life cycle. |
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Term
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Definition
| The flattened portion of a typical leaf. |
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Term
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Definition
The female reproductive organ of a flower, consisting of the stigma, style, and
ovary. |
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Term
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Definition
A water-impermeable ring of wax in the endodermal cells of plants that
blocks the passive flow of water and solutes into the stele by way of cell walls. |
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Term
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Definition
A flexible plant cell type that occurs in strands or cylinders that
support young parts of the plant without restraining growth. |
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Term
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Definition
A flower that has all four basic floral organs: sepals, petals, stamens,
and carpels. |
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Term
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Definition
A type of plant cell that is connected to a sieve-tube member by many
plasmodesmata and whose nucleus and ribosomes may serve one or more adjacent sievetube
members. |
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Term
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Definition
A gymnosperm whose reproductive structure is the cone. Conifers include
pines, firs, redwoods, and cypress. |
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Term
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Definition
A seed leaf of an angiosperm embryo. Some species have one cotyledon,
others two. |
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Term
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Definition
A class of related plant hormones that retard aging and act in concert with
auxin to stimulate cell division, influence the pathway of differentiation, and control
apical dominance. |
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Term
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Definition
Drop all of their leaves, either in response to seasonal changes or water
availability. |
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Term
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Definition
A term traditionally used to refer to flowering plants that have two embryonic
seed leaves, or cotyledons. Recent molecular evidence indicates that dicots do not form a
clade (see eudicots). |
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Term
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Definition
A term typically used to describe an angiosperm species in which carpellate
and staminate flowers are on separate plants. |
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Term
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Definition
| A taxa that is analogous to Phylum in the Animal Kingdom. |
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Term
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Definition
A taxonomic category above the kingdom level. The three domains are
Archaea, Bacteria, and Eukarya |
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Term
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Definition
A condition typified by extremely low metabolic rate and a suspension of
growth and development. |
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Term
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Definition
A mechanism of fertilization in angiosperms, in which two sperm
cells unite with two cells in the embryo sac to form the zygote and endosperm. |
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Term
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Definition
Species that are confined to a specific, relatively small geographic
area. Typical become endangered as a result of habitat destruction. |
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Term
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Definition
A nutrient-rich tissue formed by the union of a sperm cell with two polar
nuclei during double fertilization, which provides nourishment to the developing embryo
in angiosperm seeds. (3n) |
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Term
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Definition
In an angiosperm embryo, the embryonic axis above the point of attachment of
the cotyledon(s). |
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Term
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Definition
A plant that nourishes itself but grows on the surface of another plant for
support, usually on the branches or trunks of tropical trees. |
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Term
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Definition
The only gaseous plant hormone. Among its many effects are response to
mechanical stress, programmed cell death, leaf abscission, and fruit ripening. |
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Term
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Definition
| retain some of their leaves for most of the year, include most conifers. |
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Term
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Definition
A root system common to monocots consisting of a mat of thin
roots spreading out below the soil surface. |
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Term
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Definition
In an angiosperm, a short stem with up to four sets of modified leaves, bearing
structures that function in sexual reproduction. |
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Term
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Definition
| A mature ovary of a flower that protects dormant seeds and aids in their dispersal. |
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Term
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Definition
(singular, gametangium) Multicellular plant structures in which gametes
are formed. Female gametangia are called archegonia, and male gametangia are called
antheridia. |
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Term
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Definition
A haploid cell, such as an egg or sperm. Gametes unite during sexual
reproduction to produce a diploid zygote. |
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