BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
Nine types ofMentha belonging to the six species were studied for their growth,
yield, oil content and composition of the oils. The highest plant height (34.6 cm.), herbage
yield (1.0 Kg/m2) were obtained in M. citrata and oil content (1.3%) was obtained in M.
arvensis (Sivalika). The varieties M. arvensis (Sivalika), M. arvensis (CIMAP) and local ofM.
arvensis contain menthol and isomenthone (77.0% and 11.0%), menthol and menthone (72.2%
and 12.1%) and carvone and limonene (59.6% and 31.1%) respectively as major constituents.
M. piperita contain menthyl acetate (29.8%), menthol (22.6%), menthofuranone (16.4%) and
isomenthone (8.4%) as major constituents. Major constituents of M. citrata were linalool
(41.8%) and linalyl acetate (31.3%). Local varieties of M. spicata contain carvone (55.0%),
dihydrocarveol (17.9%), dihydrocarveol acetate (7.7%) and limonene (6.9%) and the exotic
type contain carvone (73.3%) and D-limonene (7.6%) asmajor constituents. M. cardiaca contain
as major constituents carvone (61.0%) and limonene (21.6%). M. aquatica contains a complex
mixture of ledol (13.5%), menthofuranone (9.4%), neryl acetate (7.6%), caryophyllene (6.8%),
caryophyllene oxide (5.8%) and mintfuranone (5.0%) as major constituents.
Seven types of Ocinuun, two from O. americanum, two from O. gratissimum, two
from O. sanctum and one from O. basilicum var. purpurascens, were studied for their
morphological differences, essential oil content and compositions. The oils were analyzed by GC
and GC/MS. All the types differ from one another in respect of their morphological characters as
well as their chemical constituents. Essential oil of the camphor type of O. americanum contains
camphor (40.3%) followed by limonene (8.8%) and α-pinene (6.1%) as major constituents and
the citral type of O. americanum contains citral (63.4%) and linalool (7.0%) as major
components. The oil of O. gratissimum contains thymol (58.2%), γ-terpinene (12.3%), p-cymene
(7.7%) and the var. clocimum of O. gratissimum contains eugenol (66.5%) and β-ocimene
(18.1%) as major components. The major components of O. sanctum (green) are eugenol
(36.5%), β-caryophyllene (24.3%) and β-elememe (12.2%) and those of O. sanctum (purple) are
eugenol (77.5%) and (E)-caryophyllene (10.7%). The oil of O. basillicum var. purpurascens
contains linalool (30.8%), geraniol (28.8%) and geranyl acetate (14.1%) as major components.
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