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Application to wheat and barley of two leaf photosynthesis models for C 3 plants
Author(s) -
DAY W.,
PARKINSON K. J.
Publication year - 1982
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/1365-3040.ep11611862
Subject(s) - photosynthesis , photorespiration , respiration , limiting , yield (engineering) , botany , quantum yield , chemistry , biological system , biology , physics , thermodynamics , mechanical engineering , engineering , quantum mechanics , fluorescence
Two models describing the relationship between net photosynthesis of leaves of C 3 plants, light intensity and CO 2 concentration in the substomatal cavities are described and fitted to data obtained in a constant environment cabinet and in the field. The first model, based on a resistance analogue for gaseous diffusion and Michaelis‐Menten biochemistry, gave the best fit to the data. For the field data, four parameters were required–quantum yield, mesophyll resistance, ‘dayrsquo; respiration and a photorespiration constant. For the cabinet data, a parameter representing the limiting photosynthesis rate was required. The second model, based on a recent more rigorous biochemical analysis of photosynthesis, contains five parameters–quantum yield, maximum carboxylation rate, ‘day’ respiration, a photorespiration constant and a maximum electron transport rate. It fitted the data less well.