SECRETORY STRUCTURES Flashcards
release of substances that have a special physiologic function
secretion
separation of products eliminated from metabolism
excretion
structure of secretory cells
dense protoplast
large nucleus
contain anti-herbivore secretion
trichomes
mechanisms for the plant to get rid of excess salt absorbed from environment
salt gland
may occur on flowers or vegetative parts
nectaries
scent of the flowers produced by essential oils
osmophores
a structure that discharge water from the interior of the leaf to the surface
hydathodes
exudation of water droplets
gutation
crystal-containing cells may die after deposition of crystal
secretory cells
in the form of spaces or cavities formed by schizogeny, lysigeny, or both
secretory spaces
derived from the word latex meaning juice in Latin
laticifers
derived from a single cell
simple laticifer
derived from union of cells
compound laticifer
compound in origin consists chain of cells
articulated laticifer
compound tubes not connected with each other laterally
articulated nonanastomosing
cell chains connected with each other laterally
articulated anastomosing
simple in origin
nonarticulated laticifer
develop more or less straight tubes
nonarticulated unbranched
each cell forms branch repeatedly forming an immense system of tubes
nonarticulated branched
specialized epidermal cells which do not have a cuticle on the outside and are not connected directly with vascular strand directly
active hydathodes
comprises loosely arranged, colorless, and parenchymatous cells known as epithem
passive hydathode
