The Impact of Genotype and Salinity on Physiological Function, Secondary Metabolite Accumulation, and Antioxidative Responses in Lettuce

被引：50

作者：

Mahmoudi, Hela ^{[2
,3
]}

Huang, Jun ^{[2
]}

Gruber, Margaret Y. ^{[2
]}

Kaddour, Rym ^{[3
]}

Lachaal, Mokhtar ^{[3
]}

Ouerghi, Zeineb ^{[3
]}

Hannoufa, Abdelali ^{[1
]}

机构：

[1] Agr & Agri Food Canada, So Crop Protect & Food Res Ctr, London, ON N5V 4T3, Canada

[2] Agr & Agri Food Canada, Saskatoon Res Ctr, Saskatoon, SK S7N 0X2, Canada

[3] Fac Sci Tunis, Tunis El Manar 2092, Tunisia

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2010年 / 58卷 / 08期

关键词：

Lettuce (Lactuca sativa L.); salinity; carotenoid; lignin; phenolics; antioxidative enzymes; malondialdehyde; SALT TOLERANCE; SUPEROXIDE-DISMUTASE; BRASSICA-CARINATA; GENETIC-ANALYSIS; GAS-EXCHANGE; GROWTH; BIOSYNTHESIS; CHLOROPLASTS; PEROXIDASE; REDUCTASE;

D O I：

10.1021/jf904274v

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

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 Na2SO4 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 Na2SO4 treatment, but Romaine showed enhanced root lignification, greater malondialdehyde formation, and suppressed Fe-superoxide dismutase expression in roots as compared with Verte.

引用

页码：5122 / 5130

页数：9

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