Examines photosynthetic efficiency of Spirulina platensis, suggesting optimal conditions for growth.
Spirulina (Arthrospira) platensis has 3 kinds of photosynthetic pigment. Their contents in Spirulina (Arthrospira) platensis are phycobilin > Chls > carotenoid. Each pigment has its own absorption characteristics in a different spectrum range, and some absorption characteristics appear in the absorption spectrum of the living body. The value of fluorescence emission apexes in all pigments is higher by 13-15 nm than that in the living body. The relative fluorescence density of pigment is 11-fold greater than that in living body. The change of photosynthetic rate is a single-peak curve, and the highest photosynthetic rate is at 13:00 in a day. The light saturation point is 28-30 µmol·m⁻²·s⁻¹, the light compensation point is 220-235 µmol. m⁻²·s⁻¹, and the optimal temperature for photosynthesis is 35 ℃. The respiration rate increases slowly with temperature.
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(63708) et al. (2005) studied this question.
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