Comparative Oil Composition Study of the Endemic Moroccan Olive (Olea europaea subsp. maroccana) and Wild Olive (var. Sylvestris) in Central West Morocco
Table 4
Phytosterol content in mg/100 g and the phytosterol composition (%) of Olea europaea subsp. maroccana (OEM) and O. e. subsp. europaea var. sylvestris (OES).
Sterols
OEM (N = 20)
OES (N = 20)
EVOO (IOC, 2019)
2017
2018
2017
2018
Total sterols (mg/100 g)
356.15 ± 7.56c
269.35 ± 5.66b
207.23 ± 6.23a
212.9 ± 8.8a
≥100
Cholesterol
0.36 ± 0.01c
0.32 ± 0.03b
0.30 ± 0.02ab
0.28 ± 0.01a
≤0.5%
24-Methylene-cholesterol
0.05 ± 0.00a
0.05 ± 0.01a
0.13 ± 0.01b
0.09 ± 0.01c
Campesterol
3.69 ± 0.02ab
3.22 ± 0.22a
4.48 ± 0.03c
3.76 ± 0.46b
≤4.0%
Campestanol
0.07 ± 0.00ns
0.05 ± 0.00ns
0.06 ± 0.00ns
0.06 ± 0.00ns
< campesterol
Stigmasterol
1.42 ± 0.01b
1.26 ± 0.03a
1.67 ± 0.02d
1.52 ± 0.05c
Clerosterol
1.09 ± 0.01c
1.12 ± 0.01d
1.00 ± 0.01b
0.98 ± 0.01a
β-Sitosterol
87.33 ± 0.07ab
88.31 ± 1.67b
85.43 ± 0.05a
86.67 ± 1.10ab
Sitostanol
0.96 ± 0.03b
1.55 ± 0.04d
0.63 ± 0.02a
1.36 ± 0.03c
∆-5-Avenasterol
3.35 ± 0.04b
2.50 ± 0.05a
5.37 ± 0.02d
4.29 ± 0.23c
∆-5,24-Stigmastadienol
0.35 ± 0.01b
0.32 ± 0.10b
0.10 ± 0.00a
0.14 ± 0.09a
≤0.4%
∆-7-Stigmastenol
0.72 ± 0.01d
0.68 ± 0.01c
0.24 ± 0.00a
0.26 ± 0.01b
∆-7-Avenasterol
0.61 ± 0.00ab
0.62 ± 0.00b
0.61 ± 0.00ab
0.59 ± 0.01a
Apparent β-sitosterol
93.45 ± 0.16ab
94.16 ± 0.54c
92.67 ± 0.10a
93.56 ± 0.17b
≥93%
Apparent β-sitosterol = clerosterol+β-sitosterol + sitostanol+Δ-5-avenasterol+Δ-7-stigmastenol. N.S.: not significant. The statistical significance level was .
