Effect of silicon nutrition on lipid peroxidation and antioxidant response of cucumber plants exposed to salinity stress

Autor:	Somayeh Khodarahmi, Maryam Haghighi, Amir Hossein Khoshgoftarmanesh
Rok vydání:	2013
Předmět:	biology food and beverages Soil Science biology.organism_classification APX Malondialdehyde Salinity Lipid peroxidation chemistry.chemical_compound Horticulture chemistry Catalase Shoot Botany biology.protein Agronomy and Crop Science Cucumis Peroxidase
Zdroj:	Archives of Agronomy and Soil Science. 60:639-653
ISSN:	1476-3567 0365-0340
Popis:	The effect of silicon (Si) on salinity-induced oxidative damages of cucumber was investigated in a greenhouse experiment. Two cucumber cultivars (Cucumis sativus L. cvs. Negin and Super Dominus) were exposed to two salinity levels (0 and 50 mM NaCl) and two Si levels (0 and 1 µM). Silicon stimulated shoot growth of cucumber particularly under saline conditions. Leaf malondialdehyde (MDA) content was increased in ‘Super Dominus’ while it remained unchanged in ‘Negin’ by salt stress. MDA content in cucumber leaves was reduced by Si. The effect of salinity on activity of catalase (CAT) and ascorbate peroxidase (APX) was dependent on enzyme type and cultivar. Silicon increased activity of CAT, APX, and guaiacol peroxidase (GPX) in the leaves. Silicon nutrition could alleviate salt-oxidative stress on cucumber plants by increasing activity of antioxidant enzymes. Higher activity of CAT, APX, and GPX in ‘Negin’ might be associated with its greater tolerance to salinity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::23cadfd0a43d71cd46cec53357262450 https://doi.org/10.1080/03650340.2013.822487 Zobrazit plný text záznamu