STUDIES OF PHOTOSYNTHESIS AND BIOMASS BY GROWTH ANALYSIS AND CONTINUOUS MONITORING OF GAS EXCHANGE

摘要

A very basic and important correlation of the rate of photosynthesis per unit leaf area (LA) with productivity, and/or biomass of plants, is still not clear and is a controversial issue. Studies on the growth under elevated CO_2 should help to elucidate the effect of enhanced rate of photosynthesis per unit LA. on biomass production. Several decades have already passed for evaluation of the effect of growth under elevated CO_2 on photosynthesis and biomass. Many studies have been done to clarify theeffect of growth under elevated CO_2 on the rate of photosynthesis in a specific single leaf at a certain time. Still many questions remain to be answered. The rates of photosynthesis changed very much during leaf development. Therefore, integration of the rate of photosynthesis by continuous measurement of CO_2 exchange in the whole plants is essential to evaluate the effects of elevated CO_2 on photosynthesis.