title: The Form in Which Nitrogen Is Supplied Affects the Polyamines, Amino Acids, and Mineral Composition of Sweet Pepper Fruit under an Elevated CO2Concentration.
abstract: We investigated the effect of supplying nitrogen, as NO3-or as NO3-/NH4+, on the composition of fruits of sweet pepper (Capsicum annuum L. cv. Melchor) plants grown with different CO2concentrations ([CO2]): ambient or elevated (800 μmol mol-1). The results show that the application of NH4+and high [CO2] affected the chroma related to the concentrations of chlorophylls. The concentrations of Ca, Cu, Mg, P, and Zn were significantly reduced in the fruits of plants nourished with NH4+, the loss of Fe being more dramatic at increased [CO2], which was also the case with the protein concentration. The concentration of total phenolics was increased by NH4+, being unaffected by [CO2]. Globally, the NH4+was the main factor that affected fruit free amino acid concentrations. Polyamines were affected differently: putrescine was increased by elevated [CO2], while the response of cadaverine depended on the form of N supplied.
authors.affiliation: Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , C/Mayor s/n, 30150 Murcia, Spain.
authors.forename: Maria C
authors.initials: MC
authors.lastname: Piñero
authors.affiliation: Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA) , C/Mayor s/n, 30150 Murcia, Spain.
authors.forename: Ginés
authors.initials: G
authors.lastname: Otálora
authors.affiliation: Agricultural Research and Development Centre of Almería (IFAPA-Almería) , Autovía del Mediterráneo, Sal. 420, Paraje San Nicolás, 04745 La Mojonera, Almería, Spain.
authors.forename: Manuel E
authors.initials: ME
authors.lastname: Porras
authors.affiliation: Agricultural Research and Development Centre of Almería (IFAPA-Almería) , Autovía del Mediterráneo, Sal. 420, Paraje San Nicolás, 04745 La Mojonera, Almería, Spain.
authors.forename: Mari C
authors.initials: MC
authors.lastname: Sánchez-Guerrero
authors.affiliation: Agricultural Research and Development Centre of Almería (IFAPA-Almería) , Autovía del Mediterráneo, Sal. 420, Paraje San Nicolás, 04745 La Mojonera, Almería, Spain.
authors.forename: Pilar
authors.initials: P
authors.lastname: Lorenzo
authors.affiliation: Agricultural Research and Development Centre of Almería (IFAPA-Almería) , Autovía del Mediterráneo, Sal. 420, Paraje San Nicolás, 04745 La Mojonera, Almería, Spain.
authors.forename: Evangelina
authors.initials: E
authors.lastname: Medrano
authors.affiliation: Agricultural Research and Development Centre of Almería (IFAPA-Almería) , Autovía del Mediterráneo, Sal. 420, Paraje San Nicolás, 04745 La Mojonera, Almería, Spain.
authors.forename: Francisco M
authors.identifier: http://orcid.org/0000-0002-2459-2472
authors.initials: FM
authors.lastname: Del Amor
mesh_terms: D000596:Amino Acids / Q000032:analysis / Q000378:metabolism*; D002212:Capsicum / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism*; D002734:Chlorophyll / Q000032:analysis / Q000378:metabolism; D005638:Fruit / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry / Q000378:metabolism*; D011073:Polyamines / Q000032:analysis / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D011073:Polyamines; D002734:Chlorophyll; D002245:Carbon Dioxide; D009584:Nitrogen
keywords: CO2 enrichment; ammonium; climate change; mineral composition; nitrate; pepper fruit