The impact of genotype and salinity on physiological function, secondary metabolite accumulation, and antioxidative responses in lettuce.
J Agric Food Chem
; 58(8): 5122-30, 2010 Apr 28.
Article
em En
| MEDLINE
| ID: mdl-20302375
ABSTRACT
Salinity inhibits plant growth due to osmotic and ionic effects. However, little is known about the impact of genotype and salinity on biochemical and molecular processes in the leafy vegetable lettuce. We report here evaluations of two lettuce types, Verte (NaCl tolerant) and Romaine (NaCl sensitive), under iso-osmotic 100 mM NaCl and 77 mM Na(2)SO(4) treatments. As compared to Romaine, NaCl-treated Verte displayed better growth, contained lower levels of inorganic cations in leaves, and possessed superior antioxidative capacity due to enhanced carotenoid and phenolics biosynthesis and more active antioxidative enzymes resulting in reduced membrane damage. Both genotypes had relatively similar growth patterns under Na(2)SO(4) treatment, but Romaine showed enhanced root lignification, greater malondialdehyde formation, and suppressed Fe-superoxide dismutase expression in roots as compared with Verte.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cloreto de Sódio
/
Lactuca
/
Antioxidantes
Idioma:
En
Revista:
J Agric Food Chem
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Canadá