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Chemical Composition of Garcinia
xanthochymus Seeds, Seed Oil, and
Evaluation of its Antimicrobial and
Antioxidant Activity
S. H. Manohar a b , P. M. Naik a c , L. M. Patil a , S. I. Karikatti a & H.
N. Murthy a
a Department of Botany, Plant Biotechnology Laboratory , Karnatak
University , Dharwad , India
b Department of Biotechnology , Jain University , Bangalore , India
c Department of Genetics and Plant Breeding , University of
Agricultural Sciences , Dharwad , India
Published online: 14 Feb 2014.
To cite this article: S. H. Manohar , P. M. Naik , L. M. Patil , S. I. Karikatti & H. N. Murthy (2014)
Chemical Composition of Garcinia xanthochymus Seeds, Seed Oil, and Evaluation of its Antimicrobial
and Antioxidant Activity, Journal of Herbs, Spices & Medicinal Plants, 20:2, 148-155, DOI:
10.1080/10496475.2013.847886
To link to this article: http://dx.doi.org/10.1080/10496475.2013.847886
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Journal of Herbs, Spices & Medicinal Plants, 20:148–155, 2014
Copyright © Taylor & Francis Group, LLC
ISSN: 1049-6475 print/1540-3580 online
DOI: 10.1080/10496475.2013.847886
Chemical Composition of Garcinia
xanthochymus Seeds, Seed Oil, and Evaluation
of its Antimicrobial and Antioxidant Activity
S. H. MANOHAR,1,2 P. M. NAIK,1,3 L. M. PATIL,1S. I. KARIKATTI,1
andH.N.MURTHY
1
1Department of Botany, Plant Biotechnology Laboratory, Karnatak University,
Dharwad, India
2Department of Biotechnology, Jain University, Bangalore, India
3Department of Genetics and Plant Breeding, University of Agricultural Sciences,
Dharwad, India
Seeds of Garcinia xanthochymus contain (in g.100−1)2.35ash,
6.93 protein, 45.22 carbohydrate, 12.3 crude fiber, and saturated
and unsaturated fatty acids at 34.17% and 65.79%, respec-
tively. Seed oil was composed of nine major fatty acids includ-
ing myristic acid (0.11%), palmitic acid (32.96%), stearic acid
(0.96%), palmitoleic acid (17.65%), oleic acid (45.87%), linoleic
acid (1.93%), linolenic acid (0.34%), arachidic acid (0.07%), and
behenic acid (0.07%). The oil demonstrated antimicrobial activity
against gram-positive bacteria. Antioxidant activities of oil were
evaluated using α,α-diphenyl-β-picrylhdrazyl reduction activities,
and it was higher than that of ascorbic acid and butylated
hydroxyanisole (IC50 =120 μg.mL−1).
KEYWORDS Unsaturated fatty acid, saturated fatty acid
INTRODUCTION
The continued increase in world population and the ever-increasing demand
for edible oil have resulted in increase in the prices of oils. In the search for
new sources of novel oils, a large number of plants have been surveyed, and
Received February 6, 2013.
Address correspondence to H. N. Murthy, Department of Botany, Plant Biotechnology
Laboratory, Karnatak University, Pavate Nagar, Dharwad 580 003, India. E-mail: nmurthy60@
yahoo.co.in
148
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Chemical Composition of Garcinia xanthochymus Seeds 149
some of the most promising species have been cultivated as new oil crops
(12). The study of nutritive value, methods of production, preservation, and
utilization is important for their effective uses.
There are hundreds of species that have received much less atten-
tion from the scientific community than the annual crops (9). Garcinia
xanthochymus is popularly known as Yellow mangosteen and is native
to India and Myanmar. The plant is known to posses several important
phytochemicals that have been demonstrated to possess antibacterial (6),
anti-inflammatory (18), and antioxidant (22) activities. The bark is used as
astringent (14). Traditionally, the fruits are used as antiscorbutic, cooling,
digestive, emollient, demulcent, cholagogue, and sherbet made from dried
fruit is used in biliousness. Garcinia mangostana and G. indica yield edible
and industrial oil (1,13). The aims of the study are to analyze the chem-
ical composition of G. xanthyochums seeds and seed oil and evaluate its
antimicrobial and antioxidant activities.
MATERIALS AND METHODS
Plant Material and Sample Preparation
G. xanthochymus fruits were collected from Bakkala garden in Sirsi,
Karnataka, India. The seeds were removed from the fruits and washed with
water. Approximately 100 g of seed was dried overnight at 80◦C and ground
in a coffee grinder. The oil was extracted for 8 h with petroleum ether
(b.p. 40–60◦C) as a solvent in a Soxhlet extractor. The solvent was removed
completely under vacuum, and the oil thus obtained was used for further
analysis. Extraction was performed in triplicates.
Proximate Analysis of Seed
Proximate analysis of moisture content, crude fat, crude protein, crude fiber,
carbohydrate, and ash was done (2).
Physico-Chemical Properties of Seed Oil
Oil from the seed was subjected to physical characterization. The color and
state of the oil at room temperature were noted by visual inspection, and
specific gravity was determined (3). The refractive index of the oil at room
temperature was estimated using the Abbe refractometer (4). Free fatty acids
(FFA), iodine value (IV), saponification number (SN), peroxide value (PV),
and unsaponifiable matter were measured (5). The analysis was performed
for the freshly extracted oils. The samples were analyzed in triplicates and
expressed as mean ±SE.
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150 S. H. Manohar et al.
Fatty Acid Analysis
Fatty acid methyl esters of G. xanthochymous seed oil were analyzed on
a Chemito G. C. 8610 gas chromatograph equipped with flame ionization
detector and capillary column B P ×70 (50 m ×0.32 mm ×0.25 µm
films). The detector temperature was 260◦C with flow rate of 0.3 mL.min−1.
The injector temperature was set at 240◦C, and nitrogen (purity 99.95 %)
was used as the carrier gas. Identification of the peaks was performed by
comparing retention times with standards.
Antimicrobial Analysis
Antimicrobial activity of G. xanthochymous seed oil was tested toward
15 microorganisms by the disc diffusion method according to the National
Committee for Clinical Laboratory Standards Guidelines (16). Six gram-
positive bacteria— Enterococcus faecalis ATCC 29212; Staphylococcus aureus
ATCC 29213; Vancomycin Resistant Enterococcus (VRE) ATCC 51299;
Bacillus subtilis SDMC 025; Micrococcus spp. SDMC 016; and Staphylococcus
epidermidis SDMC 097—and six gram-negative bacteria—Escherichia coli
ATCC 25922; Pseudomonas aeruginosa ATCC 27853; Proteus mirabilis SDMC
042; Salmonella paratyphi-A SDMC 014; Salmonella paratyphi-B SDMC 011;
and Providencia alcalifaciens SDMC 056—were used. Aspergillus niger
SDMC 052, Penicillium notatum SDMC 064, and Candida albicans SDMC
033 were the three fungi used for the study. The microorganisms used for the
analysis were obtained from American Type Culture Collection and cultures
maintained at Sri Dharmasthala Manjunatheswar Medical College, Dharwad,
Karnataka, India. The minimal inhibitory concentrations of the oil were deter-
mined by micro-dilution assay. The oil was two-fold serially diluted with
DMSO, which contained 0.125–16 µg.µL−1of oil (15).
Antioxidant Activity: Free Radical-Scavenging Capacity
The abilities of the oil to scavenge α,α-diphenyl-β-picrylhdrazyl (DPPH)
free radicals were measured (20). Ascorbic acid (ASC) and butylated
hydroxyanisole (BHA) were also monitored for radical-scavenging activity.
Inhibition of free radical by DPPH in percent was calculated as scavenging
DPPH (%) =100 ×(Ablank - Asample/Ablank), where Ablank is the
absorbance of the control reaction (containing all reagents except the oil)
and Asample is the absorbance of the sample. The percentage of scavenged
DPPH was plotted versus the concentration of antioxidants and the con-
centration of antioxidant required to obtain 50% inhibition (50% inhibition
concentration or IC50).
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Chemical Composition of Garcinia xanthochymus Seeds 151
RESULTS
Moisture, ash, crude protein, carbohydrate, and crude fiber content of the
seed were (in g.100 g−1) 11.96 ±0.52, 2.35 ±0.29, 6.93 ±0.64, 45.22 ±
1.20, and 12.3 ±1.66, respectively. The seed oil was golden-orange in color
and was consistently liquid at room temperatures (25.0◦±2.0◦C; Table 1).
The iodine value 94.86 ±0.29 mg.100 g−1indicated this oil was non-drying
and high in unsaturated fatty acids.
Fatty acid profile of G. xanthochymous seed oil was composed of nine
major fatty acids: myristic acid, palmitic acid, stearic acid, palmitoleic acid,
oleic acid, linoleic acid, linolenic acid, arachidic acid, and behenic (Figure 1,
Table 2). The concentration of saturated fatty acids (SFA) and unsaturated
fatty acids (UFA) were 34.17% and 65.79%, respectively. The most prevalent
UFA were oleic acid (45.8 g.100g−1) and palmitoleic acid (17.6 g.100g−1), and
the most prevalent SFA was palmitic acid (32.96 g.100g−1).
The oil showed inhibition against the tested gram-positive bacteria
(S. aureus, B. subtilis, Micrococcus sps,andS. epidermidis) and no activity
against the tested gram-negative bacteria and fungus (Table 3).
The oil reduced the stable radical DPPH to the yellow-colored DPPH-H
with an IC50 value of 120 µg.mL−1. Ascorbic acid (ASC) and butylated
hydroxyanisole (BHA) as two positive controls exhibited high antioxidant
activity with IC50 values 4.25 µg.mL−1and 5.66 µg.mL−1, respectively.
DISCUSSION
Although the moisture content of G. xanthochymus was less than G. man-
gostana (13.08 ±1.99 g.100 g−1), the ash content was higher than that of G.
mangostana (1). The crude protein content is comparable with 6.57 g.100g−1
TABLE 1 Physicochemical Characteristics of the Seed Oil of Garcinia xanthochymous∗
Component Garcinia xanthocymus oil
Acid value (mg NaOH/g oil) 5.43 ±0.63
Saponification number (mg KOH/g oil) 169.21 ±1.12
Unsaponifiable matter 1.20 ±0.06
Iodine value (mg/100 g) 94.86 ±0.29
FFA (%) as oleic acid 2.73 ±0.32
Peroxide value (mg/g oil) 13.9 ±1.46
Ester value (mg/KOH) 141.1 ±2.69
State at RT Liquid
Color Golden-orange
Specific gravity 0.971 ±0.01
Refractive index at RT 1.488
FFA (%), free fatty acid (%); RT, room temperature.
∗Values are means ±standard error of triplicate determinations.
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152 S. H. Manohar et al.
FIGURE 1 Gas chromatogram of fatty acids profile of Garcinia xanthochymous seed oil.
TABLE 2 Fatty Acid Composition of Garcinia xanthochymous
Seed Oil
Fatty Acid Values
C14:0 Myristic 0.11
C16:0 Palmitic 32.96
C18:0 Stearic 0.96
C16:1 Palmitoleic 17.65
C18:1 Oleic 45.87
C18:2 Linoleic 1.93
C18:3 Linolenic 0.34
C20:0 Arachidic 0.07
C22:0 Behenic 0.07
Total saturates 34.17
Total unsaturates 65.79
for G. mangostana (1). The seeds contained 31.7 ±1.74 g.100 g−1crude fat,
which is lower than 45.5 g.100 g−1reported for G. indica (13) but higher
than 21.18 ±6.18 g.100 g−1reported for G. mangostana seeds (1). The
carbohydrate and crude fiber contents were similar to that G. mangostana
(43.5 ±2.09 g.100 g−1and 13.7 ±0.89 g.100 g−1). The seeds are rich in
carbohydrates and proteins, could serve as source of roughage, and can be
used in animal feeds.
Refractive index of the oil was 1.488, comparable with that of G. man-
gostana (1). The total acidity, expressed as acid value was 5.43 ±0.63 mg
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Chemical Composition of Garcinia xanthochymus Seeds 153
TABLE 3 Antimicrobial Activity and Minimum Inhibitory Concentration of Garcinia xan-
thochymous Seed Oil
Organism
Garcinia xanthochymous
oil zone of inhibition
(mm) and MIC (µg.mL−1)
Standard Zone of
inhibition (mm) and MIC
(µg.mL−1)
S. aureus ATCC 29213 18 ≤429≤0.005
B. subtilis SDMC 025 15 ≤823≤0.010
Micrococcus SDMC 016 18 ≤432≤0.005
S. epidermidis SDMC 097 16 ≤420≤0.005
E. faecalis ATCC 29212 — 30 ≤0.010
V.R.E ATCC 51299 — 21 ≤0.010
E. coli ATCC 25922 — 24 ≤0.005
P. aeruginosa ATCC 27853 — 15 ≤0.010
S. paratyphi A SDMC 014 — 12 ≤0.020
S. paratyphi B SDMC 011 — 13 ≤0.020
P. mirabilis SDMC 042 — 24 ≤0.010
Pr. Alcalifaciens SDMC 056 — 11 ≤0.020
A. niger SDMC 052 — 13 ≤0.040
P. notatum SDMC 064 — 09 ≤0.160
C. albicans SDMC 033 — 10 ≤0.160
MIC, minimum inhibitory concentration.
NaOH/g and was within the allowable limits of edible oils (10). The
saponification value was 169.21 ±1.12 mg and KOH/g was comparable to
common vegetable oils (19). Free fatty acid (FFA) content of G. xanthochy-
mous at 2.73 ±0.32% was similar to other edible oils (7) with long shelf life.
The peroxide value of the oil was 13.9 ±1.46 g.100 g−1, suggesting that it
can be stored for a long period without deterioration; however, this value
is higher than the seed oil of G. mangostana (3.27 ±0.12 g.100 g−1). The
concentration of SFA and UFA were varied with respect to G. mangostana
(1), which was SFA, 59.6% and UFA, 35.3%.
Free radicals are believed to be involved in bacterial and parasitic
infections, lung damage, inflammation, reperfusion injury, cardiovascular
disorders, atherosclerosis, aging, and neoplastic diseases (8). In biochem-
ical systems, H2O2generates extremely reactive hydroxyl radicals in the
presence of certain transition metal ions (e.g., iron and copper) or by ultra-
violet photolysis (21). Hydroxyl radicals can attack DNA molecules, cause
lipid peroxidation (11), tissue damage, protein denaturation, and glutathione
depletion (17). The oil obtained from G. xanthochymus seeds has shown
significant antioxidant activity and hence of significant health value.
FUNDING
This work was partially financed by the University Grants Commission
under the Special Assistance program, New Delhi, India. Authors are
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154 S. H. Manohar et al.
thankful to the Department of Biotechnology (DBT-KUD-IPLS program
BT/PR14555/INF/22/126/2010), University Grants Commission [Project No. F.
No. 41-423/2012 (SR)], New Delhi and Department of Atomic Energy (BRNS
project No. 2013/35/BRNS/20), Mumbai for financial assistance.
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