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Titolo:
Interactive effects of elevated CO2, O-3, and soil water deficit on springwheat (Triticum aestivum L-cv. Nandu)
Autore:
Hudak, C; Bender, J; Weigel, HJ; Miller, J;
Indirizzi:
USDA ARS, Raleigh, NC 27603 USA USDA ARS Raleigh NC USA 27603USDA ARS, Raleigh, NC 27603 USA
Titolo Testata:
AGRONOMIE
fascicolo: 8, volume: 19, anno: 1999,
pagine: 677 - 687
SICI:
0249-5627(199912)19:8<677:IEOECO>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
OPEN-TOP CHAMBERS; CARBON-DIOXIDE; AIR-POLLUTANTS; CHLOROPHYLL CONTENT; PLANT-RESPONSES; ATMOSPHERIC CO2; CROP RESPONSES; GAS-EXCHANGE; OZONE; STRESS;
Keywords:
carbon dioxide; ozone; soil water deficit; multiple stress interaction; wheat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Bender, J Fed Agr Res Ctr FAL, Inst Agroecol, Bundesallee 50, D-38116 Braunschweig, Germany Fed Agr Res Ctr FAL Bundesallee 50 Braunschweig Germany D-38116
Citazione:
C. Hudak et al., "Interactive effects of elevated CO2, O-3, and soil water deficit on springwheat (Triticum aestivum L-cv. Nandu)", AGRONOMIE, 19(8), 1999, pp. 677-687

Abstract

This study investigated the interactive effects of elevated carbon dioxide(CO2), ozone (O-3), and soil water deficit on spring wheat (Triticum aestivum L. cv. Nandu). Plants were grown in open-top chambers (OTCs) which werearranged in a 2 x 2 factorial design consisting of two O-3 levels (ambientand 1.5-times ambient) in combination with two CO2 levels (ambient and ambient plus 320 mu mol mol(-1) CO2) Subplots in each OTC were subjected to two levels of watering, well-watered and restricted water supply. Total leaf conductance (g(L)), growth and biochemical analyses were determined to assess plant responses. The relative reduction in g(L) due to CO2, soil water deficit and/or O-3 depended on plant growth stage. However, complex interactions between the experimentally controlled factors occurred on many days. Reduced water supply resulted in growth reduction but provided some protection against the loss in dry weight caused by O-3. Elevated CO2 stimulated plant growth, but no interactive effects between CO2, soil water deficit and/or O-3 were observed, suggesting that elevated CO2 reduced the adverse effects of O-3 and/or soil water deficit in an additive manner. The complex nature of the multiple stress interactions involved was also illustrated by the responses of specific biochemical variables (carbohydrates, proline, pigments). (C) 1999 Inra/Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 10:21:45