Agriculture Reference
In-Depth Information
Maximum zones of growth inhibition of
St. epidermidis
were found under the
effect of biologically active substances extracted by acetone from the fl owers of
Po-
tentilia recta
L. and the leaves of
Filipendula ulmaria
L., where the diameter
of zones of bacteria growth inhibition reached 16 and 14 mm, respectively.
Inhibition zones for
St. epidermidis
were also observed under the effect of acetone
extracts from leaves of
Potentilia erecta
L.,
Fragaria vesca
L. and
Glycyrrhiza
uralensis L
. -11, 12, and 12 mm, respectively.
The growth of
В. mycoides
was inhibited by acetone extracts from the fl owers
of
Potentilia recta
L. and from the leaves of
Fragaria vesca
L.,
Glycyr-
rhiza uralensis L
., and
Filipendula ulmaria
L. Maximum zones of growth
inhibition of
В. mycoides
were observed under the effect of acetone extracts from
fl owers of
Potentilia recta
L. and leaves of
Glycyrrhiza uralensis L
., when
the diameter of test organism growth inhibition zones reached 14 and 13 mm, respec-
tively.
The growth of
С. albicans
was inhibited by acetone extracts from the fl owers of
Potentilia recta
L., leaves of
Potentilia erecta
L., fl owers of
Origanum vulgare
L
.
, and leaves of
Filipendula ulmaria
L., when the diameter of test organism
growth inhibition zones reached 13, 12, and 11 mm, respectively.
12.3 CONCLUSIONS
1. Our study showed that biologically active substances were presented both in
flowers and in leaves of medicinal herbs. The differences in the antibiotic
activity of extracts from leaves and flowers of herbs relatively to test microor-
ganisms could be conditioned by the chemical composition of phytoncides, as
it is known that in most of cases phytoncides are presented by a complex com-
bination of chemical compounds, characteristic for each herb species. These
herbs contain intracellular fractions of phytoncides, which are one of the fac-
tors of plant natural immunity.
2. Antibiotic activity of medicinal herb phytoncides relative to cultures of con-
ditionally pathogenic microorganisms, namely
S. aureus, S. epidermidis, B.
mycoides, and C. albican depended on the species of herbs under study.
The
extracts did not inhibit the growth of
E. coli
.
3. The highest phytoncide activity was shown by alcohol extracts of leaves of
Tanacetum vulgare
L. and
Glycyrrhiza uralensis L
. (relative to
S. aureus
),
Geranium pratense
L. and
Origanum vulgare
L
.
(relative to
S. epidermidis
),
Geranium pratense
L. and
Fragaria vesca
L., flowers of
Potentilia recta
L. (relative to
C. albican
). Among acetone extracts, the highest antibiotic ac-
tivity was found for flowers of
Potentilia recta
L. and leaves of
Filipendula
ulmaria
L. relative to most of conditionally pathogenic microorganisms (
S.
aureus, S. epidermidis, B. mycoides, and C. albican
).
4. Antibiotic activity of alcohol extracts is higher than that of acetone extracts,
what can be determined by different chemical composition of phytoncides of
medicinal herbs under study.
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