Table 1. Correlation coefficient (r) between the different physio-biochemical parameters under various concentration of PEG after 3 days of treatments.

	PRO10	PRO15	PRO20	OP10	OP15	OP20	RWC10	RWC15	RWC20	EC10	EC15	EC20	CHL10	CHL15
PRO15	0.79**	1.00
PRO20	0.57*	0.54	1.00
OP10	0.23	0.54	0.19	1.00
OP15	0.28	0.54	0.07	0.83**	1.00
OP20	0.32	0.54	0.57*	0.26	−0.17	1.00
RWC10	0.48	0.54	0.19	0.83**	0.91**	−0.03	1.00
RWC15	0.67*	0.83**	0.39	0.33	0.17	0.27	0.54	1.00
RWC20	0.69**	0.75**	0.30	0.40	0.47	−0.04	0.75**	0.89**	1.00
EC10	−0.24	−0.32	−0.24	−0.41	0.00	−0.57*	−0.15	−0.35	−0.05	1.00
EC15	−0.32	−0.61*	−0.29	−0.15	0.01	−0.33	−0.32	−0.74**	−0.61*	−0.06	1.00
EC20	−0.57*	−0.53	−0.48	−0.86**	−0.60*	−0.53	−0.77**	−0.67*	−0.59*	0.62*	0.41	1.00
CHL10	0.46	0.47	0.59*	0.52	0.09	0.75**	0.28	0.62*	0.35	−0.58*	−0.47	−0.77	1.00
CHL15	0.28	0.39	0.36	0.80**	0.41	0.57	0.58*	0.56	0.38	−0.80**	−0.27	−0.90	0.76**	1.00
CHL20	0.41	0.51	0.61*	0.45	0.13	0.91**	0.23	0.30	0.14	−0.42	−0.31	−0.62	0.70**	0.59*

For each parameter, average values of three AtDREB1A transgenic peanut lines along with WT were used. Where: PRO-proline, OP-osmotic potential, RWC-relative water content, EC-electrolytic leakage, CHL-chlorophyll content. The letters indicate the parameters followed by concentration of PEG followed by days of exposure to PEG (e.g. PRO10, Proline content at 10% PEG).* indicates a significant correlation: *P ≤0.05, and **P≤0.01.