Study Set Content:
primordia singular
primordium
cylinder of strands that is the interior of the periderm. It produces water-conducting primary xylem cells and primary phloem cells that have a variety of functions like conduction of food
Procambium
develop from a bud that begins to expand or seed germinates, the cells of apical meristems undergo mitosis
Primary meristems
produces two tissues composed of parenchyma cells
Ground meristems
the outermost part of the primary meristems that gives rise to the epidermis
Protoderm
produced by the ground meristem may become more extensive but in woody plants, it will be eventually crushed and replace by new tissues produce from within
Cortex
parenchyma tissue in the center of the stem
Pith
Both the pith and cortex function in
storing food or if chloroplast are present, in manufacturing it as well
conducts insoluble form, food manufactured by photosynthesis throughout the plant
secondary phloem
simplest form consists of solid core of conducting tissues in which the phloem usually surrounds the xylem. Common in primitive seed plants that are now extinct and are also found in whisk ferns, club mosses and other relatives of fern
Protostele
common in present-day flowering plants and conifers. Primary xylem and phloem are in discrete vascular bundles
Eusteles
cells produced by the vascular cambium or cambium become?
tracheids, vessel elements, fibers, or other components of the secondary xylem, sieve tube members , companion cells, or other components of the secondary phloem.
secondary cambium arises in the cortex or some instances in the epidermis or phloem
cork cambium or phellogen
conducts water and soluble nutrients
secondary xylem
the narrow band of cells between the primary xylem and the primary phloem may retain its meristematic nature and become the
vascular cambium
as woody stems age gas exchange happens through the
lenticels, develop beneath the stomata
flowering plants develop from seed that have two cotyledons
Dicotyledon
in young stems gas exchange takes place through the
stomata
leaf primordia and bud primordia develop into
mature buds and leaves
primary tissues of the stem
epidermis, primary xylem, primary phloem, cortex, and pith
