Table 3.

The growth intensity, level of H₂O₂ and guaiacol peroxidase (POX) activity in embryogenic lines of Picea abies and P. omorika in relationship to the PGR type used during the induction of the ET lines. (mean ± standard error). Different letters within columns indicate statistically significant differences between means for PGRs type within species (p < 0.05).

Species	PGRs Type	ET Growth [g]	H2O2 [nmol/gFW]	POX [mM/gFW]
Picea abies	2,4-D	0.58 ± 0.1 b	2.60 ± 0.2 a	54.92 ± 5.8 ab
	NAA	1.06 ± 0.1 a	2.25 ± 0.2 ab	34.76 ± 7.5 b
	picloram	0.78 ± 0.1 ab	2.01 ± 0.12 b	64.41 ± 5.8 a
Picea omorika	2,4-D	0.90 ± 0.2 a	2.01 ± 0.2 a	32.97 ± 4.9 a
	NAA	1.21 ± 0.1 a	1.61 ± 0.1 a	28.78 ± 4.2 a
	picloram	1.06 ± 0.2 a	1.46 ± 0.2 a	33.26 ± 5.5 a