. 2019 Nov 1;26(1):25–39. doi: 10.1007/s12298-019-00715-y

Table 2.

Effect of plant growth regulators (PGRs); gibberellic acid (GA₃), triacontanol (Tria) or salicylic acid (SA) on leaf nitrate reductase (NR) and carbonic anhydrase (CA) activities of two Mentha arvensis L. cultivars at 100 DAT

Treatment	NR activity [µ mole (NO₂) g⁻¹ (FM) s⁻¹]		CA activity [mole (CO₂) kg⁻¹ (FM) s⁻¹]
Treatment	Kosi	Kushal	Kosi	Kushal
Control	0.13 ± 0.03^bc	0.15 ± 0.04^C	4.40 ± 0.21^c	4.70 ± 0.35^CD
GA₃ [10⁻⁶]	0.15 ± 0.09^bc	0.16 ± 0.05^BC	6.40 ± 0.53^b	6.92 ± 0.69^B
TRIA [10⁻⁶]	0.12 ± 0.02^bc	0.14 ± 0.03^C	5.99 ± 0.61^b	6.60 ± 0.85^B
SA [10⁻⁶]	0.26 ± 0.01^a	0.30 ± 0.02^A	8.82 ± 0.43^a	9.02 ± 0.50^A
Cd [50 µM]	0.08 ± 0.75^c	0.11 ± 0.01^C	3.93 ± 0.77^c	4.12 ± 0.74^D
Cd + GA₃	0.12 ± 0.86^bc	0.17 ± 0.03^BC	4.19 ± 0.29^c	4.34 ± 0.49^CD
Cd + TRIA	0.14 ± 0.39^bc	0.14 ± 0.02^C	4.03 ± 0.39^c	4.13 ± 0.38^D
Cd + SA	0.20 ± 0.81^ab	0.27 ± 0.04^AB	6.02 ± 0.61^b	6.20 ± 0.73^BC

Data are presented as treatment mean ± SE (n = 5). Data followed by the same letter are not significantly different by Duncan’s Multiple Range Test (DMRT) at P ≤ 0.05. Capital letters indicate a significant difference between Kushal and small letters of Kosi cultivars respectively