Table 2.
Compositions of glandular trichome volatile exudates in S. tenuifolia and changes of their relative percentage (%) as affected by salt stress.
| No. | Compounds | NaCl Concentration (mM) | ||||
|---|---|---|---|---|---|---|
| 0 | 25 | 50 | 75 | 100 | ||
| 1 | Heptane,2,2,4,6,6-pentamethyl | 2.44 ± 0.07 d | 7.09 ±0.19 b | 3.99 ± 0.13 c | 7.4 ± 0.18 b | 9.6 ± 0.21 a |
| 2 | 3-Heptanone,5-ethyl-4-methyl | 0.21 ± 0.01 d | 0.79 ± 0.08 a | 0.34 + 0.03 c | 0.53 ± 0.05 b | 0.49 ± 0.04 bc |
| 3 | D-Limonene | 1.54 ± 0.01 a | 1.6 ± 0.01 a | 0.69 ± 0 b | nd | nd |
| 4 | Menthone | 5.48 ± 0.12 b | 11.74 ± 0.30 a | 10.81 ± 0.1 a | 5.67 ± 0.45 b | 3.1 ± 0.09 bc |
| 5 | Anisic acid,tridec-2-ynyl ester | 1.00 ± 0 d | 3.78 ± 0.16 bc | 1.86 ± 0.12 c | 5.38 ± 0.19 b | 13.28 ± 0.33 a |
| 6 | Pulegone | 78.66 ± 5.01 a | 63.73 ± 4.39 b | 63.99 ± 4.98 b | 48.1 ± 3.26 c | 31.03 ± 3.01 d |
| 7 | 2-Cyclohexen-1-ol,2-methyl-5-(1-methylethenyl) | 3.48 ± 0.09 | nd | nd | nd | nd |
| 8 | Ethanone,1-cyclopropyl-2(1-pyrrolidinyl) | nd | 0.8 ± 0.00 b | 0.93 ± 0.01 a | nd | nd |
| 9 | β-Caryophyllene | 2.27 ± 0.11 a | 0.99 ± 0.06 b | 0.99 ± 0.08 b | nd | nd |
| 10 | 1,6-Cyclodecadiene,1-methyl-5-methylene-8-(1-methylethyl) | 3.02 ± 0.14 a | 1.16 ± 0.09 b | 1.28 ± 0.07 b | nd | nd |
| 11 | Glycine,N-(4-butylbenzoyl)-,butyl ester | nd | nd | nd | 0.62 ± 0.02 a | 0.1 ± 0 b |
| 12 | Ethyl propyl ketone | 0.17 ± 0.02 | nd | nd | nd | nd |
| 13 | Sulfurous acid,isobutyl pentyl ester | nd | 0.27 ± 0.01 | nd | nd | nd |
| 14 | Hexanedioic acid,bis(2-ethylhexyl) ester | nd | nd | 2.29 ± 0.14 a | 1.44 ± 0.10 b | 1.76 ± 0.13 b |
| 15 | 2,2′-Methylenebis(6-tert-butyl-4-methyl-phenol) | 0.27 ± 0.04 b | nd | 1.86 ± 0.19 a | 0.22 ± 0.23 b | 1.86 ± 0.20 a |
| 16 | 3-Hexanone,2,2-dimethyl | 0.23 ± 0.01 e | 1.03 ± 0.08 b | 0.5 ± 0.02 d | 0.92 ± 0.07 bc | 2.16 ± 0.15 a |
| 17 | 1,4-Butanediol | 0.09 ± 0.00 d | 0.21 ± 0.01 c | 0.25 ± 0.01 c | 0.39 ± 0.03 b | 0.62 ± 0.07 a |
| 18 | 3-Hexanone,2,5-dimethyl | 0.45 ± 0.03 cd | 0.69 ± 0.08 c | 1.41 ± 0.12 b | 4.03 ± 0.22 a | 4.84 ± 0.22 a |
| 19 | Sulfurous acid,2-ethylhexyl hexyl ester | nd | 5.73 ± 0.71 bc | 7.93 ± 0.87 b | 24.81 ± 2.71 a | 26.70 ± 2.69 a |
| Total | 99.31 | 99.61 | 99.12 | 99.51 | 98.70 | |
| Total identified classes | ||||||
| Alkane | 2.44 ± 0.36 d | 7.09 ± 0.58 b | 3.99 ± 0.41 c | 7.4 ± 0.61 b | 9.6 ± 0.78 a | |
| Ketones | 1.06 ± 0.09 d | 3.31 ± 0.24 c | 3.18 ± 0.21 c | 5.48 ± 0.25 b | 9.64 ± 0.81 a | |
| Monoterpenes | 89.16 ± 3.44 a | 77.07 ± 3.06 b | 75.49 ± 2.71 b | 53.77 ± 1.98 c | 34.13 ± 1.65 d | |
| Esters | 1.00 ± 0.10 e | 9.78 ± 1.51 cd | 12.08 ± 1.78 c | 32.25 ± 2.13 b | 42.85 ± 3.04 a | |
| Sesquiterpene | 5.29 ± 0.56 a | 2.15 ± 0.31 b | 2.27 ± 0.35 b | 0 c | 0 c | |
| Others | 0.36 ± 0.04 d | 0.21 ± 0.02 d | 2.11 ± 0.16 ab | 0.61 ± 0.02 c | 2.48 ± 0.20 a | |
Values with different letters in the same row are significantly different at p < 0.05 (n = 3). nd: not detected.