TABLE 2.

Representative studies on the copper toxicity and nitric acid role on selected parameters in plants.

Plants	Copper concentration	Nitric oxide concentration	Time of nitric oxide supply	Parameters studied	Response	References
Panax ginseng	50 μM	100 μM		Antioxidant activity (SOD, POD, APX)	+	Tewari et al., 2008
Lycopersicon esculentum	1.0 μM	100 μM	21 days after sowing (DAS)	H2O2, MDA	_	Wang et al., 2010
Triticum aestivum	5.0 mM	100 μM	3 DAS	Germination percentage, Amylase activity	+	Hu et al., 2007
Oryza sativa	100 μM	200 μM	12 DAS	GSH, GSSG and phytochelatins	+	Mostofa et al., 2014
L. esculentum	50 μM	100 μM	8 DAS	SOD, POD, CAT, APX, H+-ATPPase, H+-PPase	+	Zhang et al., 2009
Catharanthus roseus	30 mg kg-1	50 μM	30 DAS	Phenylalanine ammonia-lyase activity and total soluble phenol content,	+	Liu et al., 2016
				leaf vincristine vinblastine and total alkaloid content
Lolium perenne	200 μM	100 μM		Seedlings growth	+	Dong et al., 2014
Lepidium sativum	50, 100, and 200 μM	50, 100 μM	20 DAS	Roots and shoots fresh weight, contents of chlorophyll a, b, total chlorophyll, and carotenoids	+	Raeisi et al., 2009
O. sativa	100 μM	200 μM	12 DAS	LOX activity, O2–, H2O2, MDA, and Proline content	_	Mostofa et al., 2014
O. sativa	10 mmol	100 mmol	12 DAS	NH4+ accumulation	_	Yu et al., 2005
Nicotiana tabacum	0.2 mM Cu	0.05 mM NO	20 DAS	Fresh weight and total chlorophyll contents,	+	Khairy et al., 2016
				Rubisco and rubisco activase activity

Symbols + and – indicate increase and decrease, respectively.