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Development of winter wheat under increased atmospheric CO2 and water limitation at tillering  [1989]

Schonfeld, M. (Purdue Univ., West Lafayette, IN) Johnson, R.C. Ferris, D.M.

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Abstract
Atmospheric CO2 concentrations are increasing world-wide and are expected to double within the next century. This study was conducted to determine the combined effects of CO2 enrichment and dehydration stress on development of 'TAM W-101' winter wheat (Triticum aestivum L.) at the tillering stage. Seedlings (one per Pot) were grown in growth chambers maintained at 350 (ambient) or 700 (enriched) mircoliter-1CO2, and subjected to three levels of soil moisture (well watered, medium stress, and severe stress). Plastochron (the developmental time for one leaf) decreased 2 to 3% at all water levels under CO2 enrichment. Averaged over CO2 treatments, water limitation increased plastochron from 90 thermal units under well-watered conditions to 126 under medium stress and 141 under severe stress. Similarly, water limitation reduced tiller number from 26 to 14 and 12 under medium and severe stress, respectively. The ratio of leaf dry wt. to leaf area (specific leaf wt.) and water use efficiency were significantly higher in plants grown under CO2 enrichment. Although CO2 enrichment had positive effects on growth and development of winter wheat at tillering, these were insufficient to counterbalance the debilitating effects of water limitation
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Other subjects

  • efficacite
  • dioxido de carbono
  • triticum aestivum
  • dioxyde de carbone
  • stade de developpement vegetal
  • indice de crecimiento
  • tallage
  • uso del agua
  • utilisation de l'eau
  • cultivos de invierno
  • triticum
  • macollamiento
  • privacion del agua
  • privation d'eau
  • teneur en matiere seche
  • contenido de materia seca
  • stress
  • periode vegetative
  • taux de croissance
  • eficacia
  • culture d'hiver
  • surface foliaire
  • superficie foliar
  • periodo vegetativo
  • etapas de desarrollo de la planta
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Other information

Language : English

Type : Journal Article

In AGRIS since : 1990

Volume : 29

Issue : 4

Start Page : 1083

End Page : 1086

All titles :

" Development of winter wheat under increased atmospheric CO2 and water limitation at tillering "