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Titolo:
Chlorophyll content of spring wheat flag leaves grown under elevated CO2 concentrations and other environmental stresses within the 'ESPACE-wheat' project
Autore:
Ommen, OE; Donnelly, A; Vanhoutvin, S; van Oijen, M; Manderscheid, R;
Indirizzi:
Fed Agr Res Ctr, Inst Agroecol, D-38116 Braunschweig, Germany Fed Agr Res Ctr Braunschweig Germany D-38116 38116 Braunschweig, Germany Univ Dublin Trinity Coll, Dept Bot, Dublin 2, Ireland Univ Dublin Trinity Coll Dublin Ireland 2 l, Dept Bot, Dublin 2, Ireland Vet & Agrochem Res Ctr, B-3080 Tervuren, Belgium Vet & Agrochem Res Ctr Tervuren Belgium B-3080 B-3080 Tervuren, Belgium DLO, Res Inst Agrobiol & Soil Fertil, AB, NL-6700 AA Wageningen, Netherlands DLO Wageningen Netherlands NL-6700 AA NL-6700 AA Wageningen, Netherlands
Titolo Testata:
EUROPEAN JOURNAL OF AGRONOMY
fascicolo: 3-4, volume: 10, anno: 1999,
pagine: 197 - 203
SICI:
1161-0301(199904)10:3-4<197:CCOSWF>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRITICUM-AESTIVUM L; OPEN-TOP CHAMBERS; ATMOSPHERIC CO2; WATER-STRESS; WINTER-WHEAT; GAS-EXCHANGE; CARBON-DIOXIDE; OZONE; YIELD; PHOTOSYNTHESIS;
Keywords:
carbon dioxide; chlorophyll; drought stress; open-top chamber; ozone; Triticum aestivum;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Manderscheid, R Fed Agr Res Ctr, Inst Agroecol, Bundesallee 50, D-38116 Braunschweig, Germany Fed Agr Res Ctr Bundesallee 50 Braunschweig Germany D-38116
Citazione:
O.E. Ommen et al., "Chlorophyll content of spring wheat flag leaves grown under elevated CO2 concentrations and other environmental stresses within the 'ESPACE-wheat' project", EUR J AGRON, 10(3-4), 1999, pp. 197-203

Abstract

Spring wheat cv. Minaret was grown in open-top chambers at four sites across Europe. The effect of different treatments (CO2 enrichment, O-3 fumigation, drought stress and temperature) on the chlorophyll content of the flag leaf was investigated using the MINOLTA SPAD-502 meter. Under optimum growth conditions the maximum chlorophyll content, which was reached at anthesis, was consistent among the sites ranging from 460 to 500 mg chlorophyll m(-2). No significant effect of elevated CO2 or O-3 was observed at anthesis. Leaf senescence, indicated by the chlorophyll breakdown after anthesis, wasrelatively constant in the control chambers. Under control conditions, thermal time until 50% chlorophyll loss was reached was 600 degrees C day. Elevated CO2 caused a faster decline in chlorophyll content (thermal time until 50% chlorophyll loss was reduced to 500-580 degrees C day) indicating a faster rate of plant development at two experimental sites. The effect of ozone on chlorophyll content depended on the time and dose of O-3 exposure. During grain filling, high O-3 concentrations induced premature senescence of the flag leaves (up to -130 degrees C day). This deleterious effect was mitigated by elevated CO2. Drought stress led to faster chlorophyll breakdown irrespective of CO2 treatment. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 22/09/20 alle ore 20:49:59