[Buczek J., 1984. The occurrence of nitrate reductase inactivating factor in extracts of Spirodela polyrrhiza. Acta Soc. Bot. Pol. 53: 411-417.10.5586/asbp.1984.036]Search in Google Scholar
[Campbell W.H., 1999. Nitrate reductase structure, function and regulation: Bridging the gap between biochemistry and physiology. Ann. Rev. Plant Physiol. Plant Mol. Biol. 50: 277-303.10.1146/annurev.arplant.50.1.27715012211]Search in Google Scholar
[Chen B.M., Wang Z.H., Li S.X., Wang G.X., Song H.X., Wang X.N., 2004. Effects of nitrate supply on plant growth, nitrate accumulation, metabolic nitrate concentration and nitrate reductase activity in three leafy vegetables. Plant Sci. 167: 635-643.10.1016/j.plantsci.2004.05.015]Search in Google Scholar
[Dapoigny L., de Tourdonnet S., Roger-Estrade J., Jeufroy M.H., Fleury A., 2000. Effect of nitrogen nutrition on growth and nitrate accumulation in lettuce (Lactuca sativa L.), under various conditions of radiation and temperature. Agronomie 20: 843-855.10.1051/agro:2000162]Search in Google Scholar
[Kowalska I., 1998. Zawartość azotanów w sałacie szklarniowej w zależności od sposobu nawożenia azotem. Mat. Konf. Nauk. "Efektywność stosowania nawozów w uprawach ogrodniczych", 8-9 czerwiec, Lublin: 127-130.]Search in Google Scholar
[Kowalska I., Sady W., 2010. Effect of poliethylene film covering the greenhouse, nitrogen fertilizer form and foliar nutrition on the yield and quality of lettuce. Folia Hort. 22(1): 37-44.10.2478/fhort-2013-0149]Search in Google Scholar
[Kozik E., 2006. Effect of harvest term and nitrogen and potassium fertilization on the content of nitrates in greenhouse lettuce. Acta Agrophysica 7(3): 633-642.]Search in Google Scholar
[Rożek S., Wojciechowska R., 1990. Effect of light and growth regulators on the circadian rhytmicity of nitrate reductase and nitrite reductase activities in greenhouse lettuce leaves. Folia Hort. 2(1): 53-64.]Search in Google Scholar
[Sakakibara H., Takei K., Hirose N., 2006. Interactions between nitrogen and cytokinin in the regulation of metabolism and development. Trends in Plant Science 11(9): 440-448.10.1016/j.tplants.2006.07.00416899391]Search in Google Scholar
[The EFSA Journal, 2008. Opinion of the Scientific Panel on Contaminant in the Food chain on a request from the European Commission to perform a scientific risk assessment on nitrate in vegetables 689: 1-79.]Search in Google Scholar
[Wojciechowska R., 2004. Some aspects of nitrate metabolism in vegetables with special reference to butterhead lettuce ‘Sprinter’. Zesz. Nauk. AR w Krakowie. Ser. Rozprawy: 297.]Search in Google Scholar
[Wojciechowska R., Siwek P., 2007. The effect of the kind of polyethylene film used for cover of low tunnels and plant shading before harvest on nitrate metabolism in butterhead lettuce. Folia Hort. 19(2): 99-107.]Search in Google Scholar
[Yang Z., Midmore D.J., 2005. A model for the circadian oscillation in expression and activity of nitrate reductase in higher plants. Ann. Bot. 96: 1019-1026.10.1093/aob/mci254424709116126776]Search in Google Scholar