Table 4.

Specific NR activities referred to total soluble protein.

Species	Taxonomic Group	NR Specific Activity (U = µmol Nitrite/min)
Ramalina farinacea	Lichen (Chlorophyta − Trebouxiophyceae + Ascomycota)	(0.91 ± 0.13) × 10−4 U/mg present work
Ulva intestinalis	Chlorophyta − Chlorophyceae	0.27 × 10−2 U/mg [53]
Physcomitrella patens	Bryophyta	0.40 × 10−4 U/mg [45]
Porphyra perforata	Rhodophyta, Bangiophyceae	8.33 × 10−4 U/mg [53]
Kappaphycus alvarezii	Rhodophyta, Gigartinales	0.16 U/mg [54]
Gracilaria tenuistipitata	Rhodophyta, Gracilariales	3.00 ± 0.20 (apical) U/mg [55] 1.60 ± 0.10 (basal) U/mg [55]
Gracilaria tikvahiae	Rhodophyta, Gracilariales	0.43 × 10−4 U/mg [58]
Gracilaria chilensis	Rhodophyta, Gracilariales	(2.53 ± 0.03) × 10−4 U/mg [56]
Gracilaria caudata	Rhodophyta, Gracilariales	0.93 × 10−4 U/mg [39]
Arabidopsis thaliana	Magnoliophyta	2.50 × 10−4 U /mg [57]