Correlation between photosynthesis and light-independent metabolism in the growth of Chlorella.

摘要: Abstract 1. Observations on the culture of Chlorella have revealed that algal cells assume two distinct forms in course their growth. One form, which we called “dark cells”, is smaller size, richer chlorophyll content, and stronger photosynthetic activity than other, referred to as “light cells”. When illuminated, dark grow and, with a substantial increase mass, turn into light cells; latter, when ripened, bear autospores themselves (on average 6–7 per cell) eventually burst setting free then become individual cells. The transformation involves no cell mass occurs only under aerobic conditions, irrespective whether are or dark. freshly born from somewhat size contain less “active” cells, former rapidly influence light. 2. processes between these types were investigated separately various experimental it was concluded (i) main event occurring photosynthesis, although accompanied by some other metabolic processes, be distinguished process ordinary sense; (ii) light-dependent also processes. 3. steady state growth, affected intensity temperature, detail, its rate compared using common unit measurement, i.e., terms weight organic matter synthesized time It found weak growth exclusively determined process, whereas strong light-independent more significant determining over-all observed relative abundance cultures varies considerably according condition, indeed proportion becomes larger weaker at higher temperatures. 4. Based evidence mentioned above, following formulae set forth describe symbolically events algae. , where D L represent respectively, kp constant changed kD number n arising one cell. Steady kinetics based this scheme lead representing functions intensity, (iii) light-saturated light-limited rates photosynthesis. Correspondence theory observations be, large, satisfactory. 5. analytical study involved has remarkably large temperature coefficient, especially range lower