Table 4.

Matrix correlation (Spearman correlation coefficients with the Bonferroni correction) between the different variables of the tested endophytic isolates.

Parameters	AWCD	E	H′	IAA Trp-	IAA Trp+	SI	psu	HTS	CTS	pH 6	pH 5	1% NaCl	4% NaCl	8% NaCl	Sugars	Amino Acids	Efficiency N/C
AWCD		0.11	0.80 *	0.05	0.07	0.07	−0.17	−0.13	−0.22	0.61 *	0.66 *	0.67 *	0.37	0.52 *	0.3	0.22	0.08
E	0.11		0.31	−0.11	−0.15	0.29	−0.46	−0.29	−0.26	−0.14	−0.30	−0.13	−0.36	−0.39	0.27	−0.13	0.48
H′	0.80 *	0.31		−0.07	−0.18	0.23	−0.10	−0.18	−0.07	0.14	0.30	0.18	−0.11	0.13	0.59	0.09	0.17
IAA Trp-	0.05	−0.11	−0.07		0.78 *	−0.16	−0.10	−0.24	−0.10	0.38	0.28	0.27	0.02	0.18	−0.14	−0.47	−0.18
IAA Trp+	0.07	−0.15	−0.18	0.78 *		−0.37	−0.13	−0.17	−0.18	0.44	0.36	0.39	0.33	0.36	−0.17	−0.37	−0.15
SI	0.07	0.29	0.23	−0.16	−0.37		−0.21	−0.20	−0.19	−0.40	−0.34	−0.34	−0.174	−0.45	0.16	−0.03	0.32
psu	−0.17	−0.46	−0.10	−0.10	−0.13	−0.21		0.39	0.81 *	−0.25	0.01	−0.25	−0.29	−0.12	−0.20	0.16	−0.17
HTS	−0.13	−0.29	−0.18	−0.24	−0.17	−0.20	0.39		0.29	−0.17	0.03	−0.14	0.19	0.01	−0.17	0.49	−0.31
CTS	−0.22	−0.26	−0.07	−0.1	−0.18	−0.19	0.81 *	0.29		−0.36	−0.22	−0.37	−0.45	−0.21	−0.02	0.10	−0.23
pH 6	0.61 *	−0.14	0.14	0.38	0.44	−0.40	−0.25	−0.17	−0.36		0.80 *	0.97 *	0.66 *	0.81 *	−0.19	0.05	−0.16
pH 5	0.66 *	−0.30	0.30	0.28	0.36	−0.34	0.01	0.03	−0.22	0.80 *		0.80 *	0.54	0.78 *	−0.22	0.04	−0.30
1% NaCl	0.67 *	−0.13	0.18	0.27	0.39	−0.34	−0.25	−0.14	−0.37	0.97 *	0.80 *		0.68 *	0.82 *	−0.224	0.13	−0.10
4% NaCl	0.37	−0.36	−0.11	0.02	0.33	−0.17	−0.29	0.19	−0.45	0.66 *	0.54	0.68 *		0.73 *	−0.14	0.14	−0.14
8% NaCl	0.52	−0.39	0.13	0.18	0.36	−0.45	−0.12	0.01	−0.21	0.81 *	0.78 *	0.82 *	0.73 *		−0.08	0.124	−0.18
Sugars	0.30	0.27	0.59	−0.14	−0.17	0.16	−0.20	−0.17	−0.02	−0.19	−0.22	−0.22	−0.14	−0.08		−0.07	0.29
Amino acids	0.22	−0.13	0.09	−0.47	−0.37	−0.03	0.16	0.49	0.10	0.05	0.04	0.13	0.14	0.12	−0.07		−0.10
Efficiency N/C	0.08	0.48	0.17	−0.18	−0.15	0.32	−0.17	−0.31	−0.23	−0.16	−0.30	−0.10	−0.14	−0.18	0.29	−0.10

Significant correlations where p < 0.0029 are marked with an asterisk and are in bold. The data were standardized. AWCD, average well color development; H′, Shannon diversity; E, Shannon evenness; IAA-like compounds Trp+, indole-3-acetic acid production in the presence of L-tryptophan; f Trp-, indole-3-acetic acid production in the absence of L-tryptophan; SI, phosphate solubilization index; psu, percent siderophores units; HTS, quantitative production of hydroxamate-type siderophores; CTS, quantitative production of catechol-type siderophores.