Table 1.
Betalain pigment compositiona in Parakeelya mirabilis petals.
| Peakb | Trivial name | Violet | Red | Yellow | Rte (min) | λmaxf (nm) | m/z [M+H]+ | m/z MS2 | |
|---|---|---|---|---|---|---|---|---|---|
| Betacyaninc | Side chain | ||||||||
| BcI | Betanin | 5-O-glucoside | 9.0 | - | - | 12.2 | 534 | 551 | 389 |
| BcI’ | Iso-betanin | 5-O-glucoside | 3.3 | - | - | 13.6 | 533 | 551 | 389 |
| BcII | Betanidin | Aglycone | 68.7 | 77.0 | - | 15.5 | 540 | 389 | 343 |
| BcII’ | Iso-betanidin | Aglycone | 19.0 | 23.0 | - | 17.3 | 540 | 389 | 343 |
| Betaxanthind | Amino acid | ||||||||
| BxI | Vulgaxanthin I | Glutamine | - | 56.0 | 56.0 | 11.9 | 469 | 340 | 323 |
| BxII | Vulgaxanthin II | Glutamic acid | - | 5.0 | 7.0 | 15.6 | 469 | 341 | 297 |
| BxIII | Dopaxanthin | Dopa | - | 25.0 | 30.0 | 25.7 | 470 | 391 | 347 |
| BxIV | Portulacaxanthin II | Tyrosine | - | 14.0 | 7.0 | 32.2 | 471 | 375 | 331 |
aProportion (%) of betacyanin and betaxanthin profiles as determined by peak integration.
-, not detectable.
bThe peak IDs are identical to Figure 3.
cSeparation in Betacyanin gradient monitored at 538 nm.
dSeparation in Betaxanthin gradient monitored at 470 nm.
eRetention time.
fWavelength of maximum absorbance.