Associating gene expressions with curcuminoid biosynthesis in turmeric

Journal of Genetic Engineering and Biotechnology

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