Table 5.

Pearson's correlation coefficients among PA contents and physiological and biochemical parameters in cv. Z057 exposed to salt stress and treated with exogenous Spd (0, 0.15, 0.30, 0.45, 0.60 mM).

	Put	Spd + Spm	ADC	ODC	SAMDC	PAO	DAO	H2O2	MDA	SOD	POD	CAT
Put	−	−0.268	0.163	−0.586*	−0.303	0.475	0.308	0.422	0.043	−0.277	−0.104	0.173
Spd + Spm	−0.268	−	0.221	0.888**	0.903**	0.340	0.669**	−0.894**	−0.819**	0.956**	0.928**	0.839**
ADC	0.163	0.221	−	0.129	0.172	0.381	0.311	−0.071	−0.263	0.382	0.387	0.399
ODC	−0.586*	0.888**	0.129	−	0.886**	0.035	0.474	−0.900**	−0.726**	0.876**	0.761**	0.625*
SAMDC	−0.303	0.903**	0.172	0.886**	−	0.287	0.790**	−0.886**	−0.871**	0.922**	0.884**	0.849**
PAO	0.475	0.340	0.381	0.035	0.287	−	0.658**	−0.218	−0.405	0.290	0.448	0.595*
DAO	0.308	0.669**	0.311	0.474	0.790**	0.658**	−	−0.599*	−0.801**	0.700**	0.769**	0.925**
H2O2	0.422	−0.894**	−0.071	−0.900**	−0.886**	−0.218	−0.599*	−	0.818**	−0.815**	−0.814**	−0.682**
MDA	0.043	−0.819**	−0.263	−0.726**	−0.871**	−0.405	−0.801**	0.818**	−	−0.798**	−0.848**	−0.823**
SOD	−0.277	0.956**	0.382	0.876**	0.922**	0.290	0.700**	−0.815**	−0.798**	−	0.919**	0.860**
POD	−0.104	0.928**	0.387	0.761**	0.884**	0.448	0.769**	−0.814**	−0.848**	0.919**	−	0.885**
CAT	0.173	0.839**	0.399	0.625*	0.849**	0.595*	0.925**	−0.682**	−0.823**	0.860*	0.885**	−

Each square indicates the Pearson's correlation coefficient of a pair of parameters. Put, diamine putrescine (nmol/g⁻¹ FW); Spd + Spm, triamine spermidine + tetraamine spermine (nmol g⁻¹ FW); ADC, arginine decarboxylase (nmol(Agm)·g⁻¹(FW)·h⁻¹); ODC, ornithine decarboxylase (nmol(Put)·g⁻¹(FW)·h⁻¹); SAMDC, S-adenosylmethionine decarboxylase (nmol(SAM)·g⁻¹(FW)·h⁻¹); PAO, polyamine oxidase (U g⁻¹ FW); DAO, diamine oxidase (U g⁻¹ FW); H₂O₂, hydrogen peroxide (nmol g⁻¹ FW); MDA, malondialdehyde (nmol g⁻¹ FW); SOD, superoxide dismutase (U min⁻¹ g⁻¹ FW); POD, peroxidase (U min⁻¹ g⁻¹ FW); CAT, catalase (U min⁻¹ g⁻¹ FW). Correlations are significant at

^*p < 0.05;

^**p < 0.01.