title: The role of 'Norin 10' dwarfing genes in photosynthetic and respiratory activity of wheat leaves.
abstract: A comparative analysis of eight cultivars of spring wheat (Triticum aestivum) classified by height as tall (T), semi-dwarf (D1), dwarf (D2) and very dwarf (D3) was conducted to study their efficiency of oxygen exchange during photosynthesis and dark respiration. Two cultivars were included in each height group.Cultivars carrying 'Norin 10' dwarfing genes (D1, D2 and D3) were found to have a significantly higher photosynthetic rate per unit leaf area than talls (T) that lack these genes. Among the 'Norin' gene carriers, dwarf group (D2) was most efficient, followed by very dwarf (D3) and semi-dwarf (D1).Photosynthetic rate and respiratory rate were found to have a positive relationship.
authors.affiliation: Laboratory of Plant Breeding, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: V P
authors.initials: VP
authors.lastname: Kulshrestha
authors.forename: S
authors.initials: S
authors.lastname: Tsunoda