scholarly journals Effect of Carbon Dioxide Concentration on Growth and Dry Matter Production of Crop Plants : VII. Influence of light intensity and temperature on the effect or carbon dioxide-enrichment in some C3-and C4-species

1979 ◽  
Vol 48 (3) ◽  
pp. 409-417 ◽  
Author(s):  
Katsu IMAI ◽  
Yoshio MURATA
Keyword(s):  
Carbon Dioxide ◽  
Light Intensity ◽  
Dry Matter ◽  
Carbon Dioxide Concentration ◽  
Crop Plants ◽  
Dry Matter Production ◽  
Carbon Dioxide Enrichment ◽  
C3 And C4 Species ◽  
C4 Species ◽  
Matter Production

AN ANALYSIS OF DRY MATTER PRODUCTION OF DOUGLAS-FIR SEEDLINGS IN RELATION TO TEMPERATURE AND LIGHT INTENSITY

1967 ◽  
Vol 45 (11) ◽  
pp. 2063-2072 ◽  
Author(s):  
Holger Brix
Keyword(s):  
Light Intensity ◽  
Leaf Area ◽  
Dry Matter ◽  
Douglas Fir ◽  
Dry Matter Production ◽  
Dry Matter Distribution ◽  
Pronounced Increase ◽  
Light Intensities ◽  
Matter Production ◽  
Net Assimilation

Seedlings of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) were grown in growth chambers under all combinations of three temperatures (13, 18, and 24 °C) and three light intensities (450, 1000, and 1800 ft-c). Dry matter production of leaves, stem, and roots was determined at 65 and 100 days after germination. The leaf area produced per unit of leaf dry weight and the dry matter distribution to the plant organs was measured. Net assimilation rates between the ages of 65 and 100 days were calculated. Rates of photosynthesis per unit of leaf were determined at different light intensities and temperatures, and rates of respiration of plant top and of roots were found for different temperatures.Increasing light intensity affected dry matter production in two opposing ways: (i) it increased the rate of photosynthesis per unit leaf area, and (ii) it decreased the leaf area added per unit of dry matter produced. A pronounced increase in growth with increase in temperature from 13 to 18 °C was a result of a temperature influence on production of leaf area rather than the effect of photosynthesis per unit of leaf. Net assimilation rates decreased with increase in temperature at all light intensities.

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