Table 4.

Correlation between measured parameters in two varieties of Zingiber officinale.

No.	Characteristic	1	2	3	4	5	6	7	8	9	10	11
1	Plant biomass	1
2	Transpiration	0.5n.s	1
3	Photosynthesis	0.87**	0.66*	1
4	Stomata conductance	0.68*	0.69*	0.95**	1
5	Chlorophyll a	−0.86**	−0.52n.s	0.64*	−0.9**	1
6	Chlorophyll b	0.12n.s	0.22n.s	0.18n.s	0.13n.s	0.21n.s	1
7	Chlorophyll a + b	−0.83**	−0.37ns	−0.7*	−0.67*	0.89**	0.43n.s	1
8	Chlorophyll a:b	−0.68*	−0.51n.s	−0.86**	−0.79**	0.81**	−0.52n.s	0.48n.s	1
9	Flavonoids	−0.65*	0.11n.s	−0.63*	−0.64*	0.61*	0.13n.s	0.61*	0.36n.s	1
10	Phenolics	0.78**	0.6*	0.85**	0.84**	−0.68*	0.14n.s	−0.54n.s	−0.69*	0.03n.s	1
11	Soluble carbohydrate	0.81**	0.65*	0.92**	0.86**	−0.92**	0.07n.s	−0.8**	−0.82**	−0.41n.s	0.82**	1

n.s = non significant;

^*= significant at p ≤ 0.05;

^**= significant at p ≤ 0.01.