Effect of short-term salinity on the nitrate reductase activity in cucumber roots

Application of silicon ameliorated salinity stress and improved wheat yield

“…However, by applying Si, chlorophyll pigments increased under normal conditions as well as under salinity stress conditions. Researchers found salinity stress to hinder plants from absorbing nutrients, e.g., nitrogen (N), phosphorus (P), and potassium (K) resulting in reducing these nutrients concentrations in plant tissues (Reda et al, 2011). During stress conditions, plants tend to increase proline concentration in their tissues in order to facilitate water uptake and maintain osmotic balance (Filippou et al, 2014).…”

Response of nitrate reductase activity and NIA genes expression in roots of Arabidopsis hxk1 mutant treated with selected carbon and nitrogen metabolites

“…Reduction of inorganic nitrogen predominantly occurs in green tissues. However, in the roots relatively high nitrate reductase activities and other nitrate assimilation enzymes are also determined [26,36]. In Arabidopsis hxk1 mutant and WT roots the nitrate reductase total and actual activities, NR activation state and also NIA2 gene expression are at a similar level.…”

“…Frozen root tissue (1 g) was ground in a chilled mortar with 2 mL of extraction buffer as described previously by Reda et al [26]. Crude supernatants were used for measurement of nitrate reductase activity in the absence of MgCl 2 (−Mg 2+ , total NR activity) and/or in the presence of MgCl 2 (+Mg 2+ , actual NR activity) according to Kaiser and Huber [7] with some modifications.…”

Nutrición mineral y fotosíntesis en plántulas de algarrobo blanco, Prosopis alba (Fabaceae), en estrés salino

“…Se ha reportado una disminución significativa en la actividad NR en hojas de Brassica juncea (Siddiqui, Mohammad, Khan, Mohamed & Al-Whaibi 2012), genotipos sensibles de trigo (Carillo et al, 2008;Yousfi, Serret, Márquez, Voltas & Araus, 2012), tomate (Gong et al, 2013), algodón (Kawakami, Osterhuis & Snider, 2013), girasol , Vigna unguiculata (Magalhães de Aragão, Silva, Lima & Silveira, 2011) y hojas y raíces de álamo (Ehlting et al, 2007) sometidas a estrés con NaCl. Por el contrario, el estrés salino incrementó la actividad nitrato reductasa en raíces de pepino (Reda, Migocka & Klobus, 2011) y tomate (Debouba, Maâroufi-Dghimi, Suzuki, Ghorbel & Gouia, 2007).…”