Study Set Content:
ethereal oil or essential oil
VOLATILE OIL
VOLATILE OIL odor
odorous
when exposed to the air
evaporate
VOLATILE OIL color
colorless
immiscible with
water
soluble in
alcohol and other organic s
refractive indices
high
SPECIALIZED SECRETORY STRUCTURES FOUND IN PLANT PARTS
glandular hairs
Labiatae
modified parenchymal cell
Piperaceae
oil tubes (vittae)
Umbelliferae
lysigenous/schizogenous passages
Pinaceae, Rutaceae
OTHER PLANT PARTS THAT CONTAIN VOLATILE OILS
• petals
rose
bark and leaves
cinnamon
pericarp -
umbelliferous fruits
glandular hairs
mints
rind -
orange
volatile may be formed directly by the ____, by ____ of the resigenous layer of the cell wall, or by the ____ of certain glycosides.
protoplasm, decomposition, hydrolysis
formed via the acetate- mevalonic acid pathway.
Terpene derivatives
formed via the shikimic acid-phenylpropanoid route
Aromatic compounds
• Natural products whose structures are divided into isoprene units.
TERPENES
