Exposure to single-walled carbon nanotubes differentially affect in vitro germination, biochemical and antioxidant properties of Thymus daenensis celak. seedlings

Table 5 Activities of PAL, POD, PPO and DHA enzymes in the extracts of T. daenensis exposed to different concentrations of SWCNTs

SWCNT (µg ml-1)	PAL (mM cm g⁻¹ FW)	POD (µm. cm g⁻¹ FW min⁻¹)	PPO (mM cm g⁻¹ FW min⁻¹)	DHA (µm. TPF g⁻¹ min⁻¹)
0	12.51 ± 0.07 a	12.49 ± 0.10 f	0.50 ± 0.01 c	0.52 ± 0.01 a
62.5	12.05 ± 0.2 a	14.43 ± 0.05 d	0.59 ± 0.00 b	0.47 ± 0.00 a
125	12.44 ± 2.8 a	16.74 ± 0.07 c	0.62 ± 0.01 b	0.18 ± 0.02 b
250	9.81 ± 0.08 b	13.030 ± 0.07 e	0.83 ± 0.08 a	0.08 ± 0.02 c
500	5.46 ± 0.4 c	75.64 ± 0.2 b	0.85 ± 0.01 a	0.07 ± 0.00 c
1000	1.66 ± 0.05 d	90.79 ± 0.06 a	0.81 ± 0.00 a	0.08 ± 0.01 c

Abbreviations: DHA dehydrogenase, POD peroxidase, PPO polyphenol oxidase, PAL phenylalanine ammonia lyase

ISSN: 1471-2229