Table 1.
Curcuminoid contents in turmeric cultivars at different stages under study
| Sample ID | Curcumin (%) | Demethoxy curcumin (%) | Bisdemethoxycurcumin (%) | Total curcuminoid (%) | Rhizome yield (t ha−1) | Growth duration (days) |
|---|---|---|---|---|---|---|
| NDH-98_SI | 0.27 | 0.76 | BDL | 1.03 | ||
| NDH-98_SII | 0.1 | 0.36 | BDL | 0.46 | ||
| NDH-98_SIII | 0.04 | 0.08 | BDL | 0.12 | ||
| Average NDH-98 | 0.14b (25%) | 0.40a (75%) | BDL | 0.54b (100%) | 33–34 | 240 |
| GNT-2_SI | 2.31 | 0.71 | 1.14 | 4.16 | ||
| GNT-2_SII | 0.76 | 0.07 | 0.15 | 0.98 | ||
| GNT-2_SIII | 0.81 | 0.18 | 0.24 | 1.23 | ||
| Average GNT-2 | 1.29a (61%) | 0.32a (15%) | 0.51a (24%) | 2.12a (100%) | 28–29 | 256 |
| Pratibha_SI | 0.56 | 0.11 | 0.14 | 0.81 | ||
| Pratibha_SII | 1.29 | 0.17 | 0.14 | 1.6 | ||
| Pratibha_SIII | 1.33 | 0.22 | 0.24 | 1.79 | ||
| Average Pratibha | 1.06a (76%) | 0.17a (12%) | 0.17b (12%) | 1.40ab (100%) | 23–24 | 256 |
“a” and “b” are the significance letters which indicate that values with the same letters in a column are statistically not significant from each other at p < 0.05. [NDH-98 has lower curcumin (25%), higher demethoxycurcumin (75%), and negligible bisdemethoxycurcumin; GNT-2 has higher curcumin (61%) and lower bisdemethoxycurcumin (24%) and demethoxycurcumin (15%); Pratibha has higher curcumin (76%) and lower demethoxycurcumin (12%) and bisdemethoxycurcumin (12%); GNT-2 and Pratibha have similar and higher total curcuminoid yield than NDH-98]
NDH-98, GNT-2, and Pratibha turmeric cultivars
BDL Below the detection limit during HPLC analysis, SI 4 months after planting, SII 5 months after planting, SIII 6 months after planting