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Titolo:
Acclimation of the summer annual species, Lolium temulentum, to CO2 enrichment
Autore:
Lewis, CE; Peratoner, G; Cairns, AJ; Causton, DR; Foyer, CH;
Indirizzi:
AFRC, Inst Grassland & Environm Res, Dept Environm Biol, Aberystwyth SY23 3EB, Ceredigion, Wales AFRC Aberystwyth Ceredigion Wales SY23 3EB th SY23 3EB, Ceredigion, Wales Univ Wales, Inst Biol Sci, Aberystwyth SY23 3DD, Ceredigion, Wales Univ Wales Aberystwyth Ceredigion Wales SY23 3DD 3 3DD, Ceredigion, Wales
Titolo Testata:
PLANTA
fascicolo: 1, volume: 210, anno: 1999,
pagine: 104 - 114
SICI:
0032-0935(199911)210:1<104:AOTSAS>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBON-DIOXIDE CONCENTRATION; PLANT-GROWTH ANALYSIS; ATMOSPHERIC CO2; ELEVATED CO2; FRUCTAN BIOSYNTHESIS; EXCISED LEAVES; PHASEOLUS-VULGARIS; NITRATE REDUCTASE; AMBIENT CO2; PHOTOSYNTHESIS;
Keywords:
carbohydrate; CO2 enrichment; Lolium (CO2 enrichment); photosynthesis; respiration; ribulose-1,5-bisphosphate carboxylase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Foyer, CH IACR Rothamsted, Dept Biochem & Physiol, Harpenden AL5 2JQ, Herts, England IACR Rothamsted Harpenden Herts England AL5 2JQ Herts, England
Citazione:
C.E. Lewis et al., "Acclimation of the summer annual species, Lolium temulentum, to CO2 enrichment", PLANTA, 210(1), 1999, pp. 104-114

Abstract

Lolium temulentum L. Ba 3081 was grown hydroponically in air (350 mu mol mol(-1) CO2) and elevated CO2 (700 mu mol mol(-1) CO2) at two irradiances (150 and 500 mu mol m(-2) s(-1)) for 35 days at which point the plants were harvested. Elevated CO2 did not modify relative growth rate or biomass at either irradiance. Foliar carbon-to-nitrogen ratios were decreased at elevated CO2 and plants had a greater number of shorter tillers, particularly at the lower growth irradiance. Both light-limited and light-saturated rates ofphotosynthesis were stimulated. The amount of ribulose-1,5-bisphosphate carboxylase-oxygenase (Rubisco) protein was increased at elevated CO2, but maximum extractable Rubisco activities were not significantly increased. A pronounced decrease in the Rubisco activation stale was found with CO2 enrichment, particularly at the higher growth irradiance. Elevated-CO2-induced changes in leaf carbohydrate composition were small in comparison to those caused by changes in irradiance. No CO2-dependent effects on fructan biosynthesis were observed. Leaf respiration rates were increased by 68% in plants grown with CO2 enrichment and low light. We conclude that high CO2 will only result in increased biomass if total light input favourably increases thephotosynthesis-to-respiration ratio. At low irradiances, biomass is more limited by increased rates of respiration than by CO2-induced enhancement ofphotosynthesis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 12:53:22