Table 3.

Linear correlations between multispectral indices and midday stem water potential (Ψ_stem).

Index	a	b	R2
NDVI *	−4.70	6.19	0.35
GNDVI *	−203.36	−140.75	0.31
PRI	−1.32	1.44	0.09
TCARI-OSAVI	−0.92	−0.74	0.09
GI	−2.03	1.40	0.06
MCARI	−1.27	−0.60	0.02
MCARI1	−1.22	−0.33	0.03
MCARI2	−1.43	0.03	<0.01
MSAVI	−1.31	−0.28	0.00
MSR *	10.78	8.45	0.34
MTVI3	−1.22	−0.33	0.03
SRI	−2.01	0.23	0.06
RDVI	−1.28	−0.35	0.00

* p < 0.05, a = intercept, b = slope.