Photosynthesis and Biomass. II. Effect of elevated CO₂ and light intensity on growth and photosynthesis with radish cv. White Cherrish.

Abstract

The research of simultaneous measurements of CO₂ exchange and growth have been continued to evaluate the impact of photosynthesis on biomass. Plants of radish, cv White Cherrish with big storage root were grown for 6 days under 4 different conditions (1: ambient CO₂ of ca. 380 ppm and 23 molE/m²⁺/day, 2: elevated CO₂ of ca. 750 ppm and 23 molE/m²⁺/day, 3: ambient CO₂ of ca. 380 ppm and 15 molE/m²⁺/day, 4:elevated CO₂ of ca. 750 ppm and 15 molE/m²⁺/day) and the rates of CO₂ exchange were monitored continuously during whole periods of growth analysis. The results of growth analysis of RGR, NAR, LAR, LWR, SLA, leaf area, rates of photosynthesis and respiration, and water use efficiencies under 4 different conditions will be discussed comparing the results with radish cv. Kosena with small storage root which was presented last year.