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Titolo:
Effects on nutrients and on grain quality in spring wheat crops grown under elevated CO2 concentrations and stress conditions in the European, multiple-site experiment 'ESPACE-wheat'
Autore:
Fangmeier, A; De Temmerman, L; Mortensen, L; Kemp, K; Burke, J; Mitchell, R; van Oijen, M; Weigel, HJ;
Indirizzi:
Univ Giessen, Inst Plant Ecol, D-35392 Giessen, Germany Univ Giessen Giessen Germany D-35392 lant Ecol, D-35392 Giessen, Germany Vet & Agrochem Res Tervuren, B-3080 Tervuren, Belgium Vet & Agrochem Res Tervuren Tervuren Belgium B-3080 80 Tervuren, Belgium TEAGASC, Agr & Food Dev Author, Oak Pk Res Ctr, Carlow, Ireland TEAGASC Carlow Ireland Food Dev Author, Oak Pk Res Ctr, Carlow, Ireland AFRC, Inst Arable Crops Res, Dept Biochem & Physiol, Harpenden AL5 2JQ, Herts, England AFRC Harpenden Herts England AL5 2JQ l, Harpenden AL5 2JQ, Herts, England Wageningen Univ Agr, Dept Theoret Prod Ecol, NL-6700 AK Wageningen, Netherlands Wageningen Univ Agr Wageningen Netherlands NL-6700 AK ingen, Netherlands FAL, Inst Prod & Ecotoxicol, D-38116 Braunschweig, Germany FAL Braunschweig Germany D-38116 otoxicol, D-38116 Braunschweig, Germany
Titolo Testata:
EUROPEAN JOURNAL OF AGRONOMY
fascicolo: 3-4, volume: 10, anno: 1999,
pagine: 215 - 229
SICI:
1161-0301(199904)10:3-4<215:EONAOG>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
RISING ATMOSPHERIC CO2; TRITICUM-AESTIVUM L; TOP FIELD CHAMBERS; SPRUCE PICEA-ABIES; TROPOSPHERIC OZONE; NORWAY SPRUCE; MINERAL-NUTRITION; LITTER QUALITY; CLIMATE CHANGE; AMBIENT AIR;
Keywords:
CO2 enrichment; grain quality; nutrients; Triticum aestivum; tropospheric ozone;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Fangmeier, A Univ Giessen, Inst Plant Ecol, D-35392 Giessen, Germany Univ Giessen Giessen Germany D-35392 35392 Giessen, Germany
Citazione:
A. Fangmeier et al., "Effects on nutrients and on grain quality in spring wheat crops grown under elevated CO2 concentrations and stress conditions in the European, multiple-site experiment 'ESPACE-wheat'", EUR J AGRON, 10(3-4), 1999, pp. 215-229

Abstract

Nutrient element concentrations and grain quality were assessed in spring wheat grown under elevated CO2 concentrations and contrasting levels of tropospheric ozone at different nitrogen supply rates at several European sites. Carbon dioxide enrichment proved to affect nutrient concentrations in a complex manner, In green leaves, all elements (with exception of phosphorusand iron) decreased. In contrast, effects on the element composition of grains were restricted to reductions in nitrogen, calcium, sulphur and iron. Ozone exposure resulted in no significant effects on nutrient element concentrations in different tissues in the overall analysis. The nitrogen demandof green tissues was reduced due to CO2 enrichment as shown by reductions in the critical leaf nitrogen concentration and also enhanced nitrogen use efficiency. Reductions in the content of ribulose-bisphosphate carboxylase/oxygenase and repression of the photorespiratory pathway and reduced nitrogen allocation to enzymes driving the photosynthetic carbon oxidation cycle were chiefly responsible for this effect. Thus, nitrogen acquisition by thecrop did not match carbon acquisition under CO2 enrichment, Since crop nitrogen uptake from the soil was already completed at anthesis, nitrogen allocated to the grain after anthesis originated from vegetative poors-causing grain nitrogen concentrations to decrease under CO2 enrichment (on average by 15% when CO2 concentrations increased from 360 to 680 mu mol mol(-1)). Correspondingly, grain quality was reduced by CO2 enrichment. The Zeleny value, Hagberg value and dry/wet gluten content decreased significantly with increasing [CO2]. Despite the beneficial impact of CO2 enrichment on growth and yield of C-3 cereal crops, declines in flour quality due to reduced nitrogen content are likely in a future, [CO2]-rich world. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 11:28:24