Table 3. Amino acids and fatty acids composition of root exudates from sweet flag (A. calamus) cultivated in hydroponic systems after 2 months.
| Class of compounds | Single compounds | Concentration (μM L−1) |
|
|---|---|---|---|
| Without PAH addition | With PAH addition | ||
| Amino acids | |||
| Aspartic acid | 3.837 ± 0.686 | 7.294 ± 1.270 | |
| Glutamic acid | 1.205 ± 0.433 | 2.997 ± 0.054 | |
| Serine | 0.986 ± 0.106 | 2.966 ± 0.932 | |
| Histidine | NDa | 0.453 ± 0.030 | |
| Glycine | 8.266 ± 0.194 | 9.590 ± 0.637 | |
| Threonine | ND | 0.742 ± 0.036 | |
| Alanine | 0.294 ± 0.035 | 1.907 ± 0.091 | |
| Arginine | 1.599 ± 0.329 | 1.842 ± 0.050 | |
| Tyrosine | ND | 0.345 ± 0.032 | |
| Cysteine | 0.518 ± 0.159 | 0.294 ± 0.001 | |
| Valine | 1.096 ± 0.583 | 5.228 ± 0.116 | |
| Methionine | 1.198 ± 0.106 | 1.949 ± 0.566 | |
| Phenylalanine | 0.254 ± 0.028 | 1.865 ± 0.067 | |
| Isoleucine | 0.208 ± 0.024 | 0.891 ± 0.042 | |
| Leucine | 0.270 ± 0.030 | 1.019 ± 0.188 | |
| Lysine | 0.388 ± 0.037 | 0.586 ± 0.056 | |
| Fatty acids | |||
| Formic acid | 0.303 ± 0.013 | 0.270 ± 0.037 | |
| Acetic acid | 1.057 ± 0.094 | 3.049 ± 0.108 | |
| Citric acid | 0.103 ± 0.006 | 0.103 ± 0.023 | |
| Malic acid | 0.234 ± 0.011 | 0.433 ± 0.004 | |
Data are means ± standard deviation
aND, not detected, below the detection limit.