@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS010 prodottidellaricerca:prodotto prodotto:ID10637 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA111 pubblicazioni:autoreCNRDi prodotto:ID10637 . unitaDiPersonaleInterno:MATRICOLA10075 pubblicazioni:autoreCNRDi prodotto:ID10637 . @prefix unitaDiPersonaleEsterno: . unitaDiPersonaleEsterno:ID5093 pubblicazioni:autoreCNRDi prodotto:ID10637 . @prefix modulo: . modulo:ID1954 prodottidellaricerca:prodotto prodotto:ID10637 . @prefix rdf: . @prefix retescientifica: . prodotto:ID10637 rdf:type retescientifica:ProdottoDellaRicerca , prodotto:TIPO1101 . @prefix rdfs: . prodotto:ID10637 rdfs:label "Characteristics of CO2 exchange between peach stems and the atmosphere (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID10637 pubblicazioni:anno "2005-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID10637 skos:altLabel "
Alessio G.A.; Pietrini F.; Brilli F.; Loreto F. (2005)
Characteristics of CO2 exchange between peach stems and the atmosphere
in Functional plant biology (Print)
"^^rdf:HTML ; pubblicazioni:autori "Alessio G.A.; Pietrini F.; Brilli F.; Loreto F."^^xsd:string ; pubblicazioni:paginaInizio "787"^^xsd:string ; pubblicazioni:paginaFine "795"^^xsd:string ; pubblicazioni:altreInformazioni "Impact factor 2010: 2.156"^^xsd:string ; pubblicazioni:numeroVolume "32"^^xsd:string . @prefix ns12: . prodotto:ID10637 pubblicazioni:rivista ns12:ID62744 ; pubblicazioni:numeroFascicolo "9"^^xsd:string ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "CNR, Ist Biol Agroambientale & Forestale, I-00016 Monterotondo, Italy"^^xsd:string ; pubblicazioni:titolo "Characteristics of CO2 exchange between peach stems and the atmosphere"^^xsd:string ; prodottidellaricerca:abstract "Gas exchange by stems is dominated by respiratory CO2 emission, but photosynthetic CO2 uptake might also occur in stem bark. We show that light-dependent CO2 uptake was present and often exceeded CO2 release by respiration in illuminated current-year peach (Prunus persica L.) stems. Respiration of peach stems, as detected by (CO2)-C-12 release into air in which the natural concentration of (CO2)-C-12 was replaced with (CO2)-C-13, was lower in the light than in the dark, but this accounted for only a fraction of the observed total CO2 uptake by illuminated stems. Stem photosynthesis was saturated at low light and was negatively affected by elevated assay temperatures (30 degrees C), especially when combined with light intensities above saturation. An inefficient mechanism of heat dissipation by transpiration in stomata-free stems might help explain this effect. Photosynthesis was rapidly stimulated and the electron transport rate was reduced when photorespiration was suppressed by exposure to low (2 kPa) oxygen. The time-course of these changes was closely associated with a transient burst of CO2 uptake concurrent with a reduced inhibition of fluorescence yield. Photosynthesis was also stimulated by exposure to elevated (twice ambient) CO2 concentration. These combined measurements of gas exchange and fluorescence suggested that (a) photorespiration may also be active in the bark of peach stems, (b) O-2 and CO2 concentrations in the bark of peach stems may be similar to ambient concentrations, (c) a large amount of electron transport unrelated to photosynthesis and photorespiration may also be present in peach stems, and (d) stem photosynthesis may be enhanced under future atmospheric conditions."@en ; prodottidellaricerca:prodottoDi istituto:CDS010 , modulo:ID1954 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA111 , unitaDiPersonaleInterno:MATRICOLA10075 , unitaDiPersonaleEsterno:ID5093 . @prefix parolechiave: . prodotto:ID10637 parolechiave:insiemeDiParoleChiave . ns12:ID62744 pubblicazioni:rivistaDi prodotto:ID10637 . parolechiave:insiemeDiParoleChiaveDi prodotto:ID10637 .