The marine macroalga Porphyra haitanensis (Bangiales, Rhodophyta) was cultured at different temperatures (15℃ and 25℃) and CO2 concentrations (390 μL/L and 700 μL/L), so as to investigate the effects of temperature and CO2 concentration on the growth and thermal characteristics of this species. The results showed that algae grown at 15℃ had higher relative growth rate and pigment contents (Chla and Car) than at 25℃. Such temperature effects were more pronounced at high CO2 concentrations. Additionally, algae grown at 15℃ showed higher levels of soluble protein and soluble carbohydrate. When exposed to 10℃ stress for 3 h, algae grown at 15℃ exhibited a slower decline in maximum photochemical quantum yield (Fv/Fm), photosynthetic light use efficiency (α) and non-photochemical quenching (NPQ) as compared to those grown at 25℃. When treated with 35℃ for 3 h, the rETRmax, Fv/Fm and α all decreased, with the algae grown at 15℃ displaying higher decrease extent than those at 25℃. However, such decrease was less pronounced in the algae cultured at high CO2 concentrations as compared to those cultured at normal CO2 Concentration. When treated with 40℃, the rETRmax, Fv/Fm, α, NPQ and qP drastically decreased. Our results suggested that elevated CO2 improved the heat endurance in P. haitanensis.
丁柳丽, 刘露, 邹定辉*. 不同温度与CO2浓度对坛紫菜生长和光合作用温度反应特性的影响[J]. , 2013, 32(2): 151-157.
DING Liu-li, LIU Lu, ZOU Ding-hui*. Effects of different temperature and CO2 concentrations on the growth and photosynthetic response to temperature in Porphyra haitanensis. , 2013, 32(2): 151-157.
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