Tomato Fruit Antioxidants in Relation to Salinity and Greenhouse Climate
| Autor: | Moussa S. Diarra, Kevin Usher, Dan Steinke, David L. Ehret, Glenn Block, Tallie Kuang, Tom Helmer, Brenda Frey |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Salinity
Lutein Antioxidant Oxygen radical absorbance capacity Climate medicine.medical_treatment Ascorbic Acid Real-Time Polymerase Chain Reaction Antioxidants chemistry.chemical_compound Lycopene Hydroponics Solanum lycopersicum beta-Carotene Botany medicine Carotenoid Plant Proteins chemistry.chemical_classification food and beverages General Chemistry beta Carotene Ascorbic acid Carotenoids Horticulture chemistry RNA Plant Fruit Xanthophyll General Agricultural and Biological Sciences |
| Zdroj: | Journal of Agricultural and Food Chemistry. 61:1138-1145 |
| ISSN: | 1520-5118 0021-8561 |
| Popis: | A two-year study of antioxidants in greenhouse tomato was conducted. Plants were treated continuously with nutrient solution electrical conductivities (EC) of 2, 4, or 6 dS m⁻¹. Increasing EC reduced yield per plant and fruit size. Oxygen radical absorbance capacity (ORAC), lutein, β-carotene, lycopene, and vitamin C concentrations were evaluated in harvested fruit. ORAC and all antioxidants with the exception of lutein increased with EC. None of the 10 genes involved in antioxidant metabolism were affected by salinity in ripe fruit, but the expression of three of them (ZDS, CrtR-b1, and NCED1) varied with the stage of fruit development. Antioxidant concentrations were related to greenhouse climatic conditions. β-Carotene, lycopene, lutein, and vitamin C responded negatively to light and positively to temperature, whereas ORAC was unresponsive. Multiple regressions of antioxidants in relation to EC and climatic factors showed that antioxidants responded more strongly to light and temperature than to EC. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|