EFFECTS OF NITROGEN AND PHOSPHORUS CONCENTRATIONS ON GROWTH AND PHOTOSYNTHETIC PHYSIOLOGY OF <i>Pseudanabaena</i> sp.

ZHOU Li; WANG Mao-wei; GAO Jing-si; ZHU Jia

doi:10.13205/j.hjgc.202011018

Volume 38 Issue 11

Apr. 2021

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ZHOU Li, WANG Mao-wei, GAO Jing-si, ZHU Jia. EFFECTS OF NITROGEN AND PHOSPHORUS CONCENTRATIONS ON GROWTH AND PHOTOSYNTHETIC PHYSIOLOGY OF Pseudanabaena sp.[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 110-116,134. doi: 10.13205/j.hjgc.202011018

Citation:

ZHOU Li, WANG Mao-wei, GAO Jing-si, ZHU Jia. EFFECTS OF NITROGEN AND PHOSPHORUS CONCENTRATIONS ON GROWTH AND PHOTOSYNTHETIC PHYSIOLOGY OF Pseudanabaena sp.[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 110-116,134. doi: 10.13205/j.hjgc.202011018

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EFFECTS OF NITROGEN AND PHOSPHORUS CONCENTRATIONS ON GROWTH AND PHOTOSYNTHETIC PHYSIOLOGY OF Pseudanabaena sp.

doi: 10.13205/j.hjgc.202011018

1. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China;
2. Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;
3. Department of Building and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China

Received Date: 2019-08-14
Available Online: 2021-04-23
Publish Date: 2021-04-23

Abstract

Abstract

The effects of nitrogen and phosphorus concentrations on the growth, chlorophyll fluorescence parameters (F_v/F_m、α、rETR_max、I_K) and the ratio of carotenoid to chlorophyll a of Pseudanabaena sp. were investigated. Moreover, the Pseudanabaena sp. growth kinetics utilizing nitrogen and phosphorus was demonstrated through Monod equation and Droop equation. The semi-saturation constants, K_{s_P} of total phosphorus, intracellular phosphorus share and the semi-saturation constants K_{s_N} of total nitrogen were calculated. The results showed that the effects of different nitrogen and phosphorus concentrations on the growth of Pseudanabaena sp. were significant(P<0.01). The chlorophyll a of Pseudanabaena sp. was positively correlated with nitrogen concentration ranging from 0 to 230.4 mg/L, and phosphorus concentration higher than 5.12 mg/L inhibited the growth of Pseudanabaena sp. The chlorophyll fluorescence parameters were significantly affected by different nitrogen concentrations (P<0.05). Concentrations of phosphorus had a significant effect on F_v/F_m、I_K and no significant effect on rETR_max, α (P>0.05). K_{s_P} was far less than K_{s_N}, which proved that Pseudanabaena sp. had better affinity for phosphorus. The minimum share of intracellular phosphorus for Pseudanabaena sp. was 0.0486 μg/mg, under which the proliferation of algal cells will cease. The ratio of carotenoid to chlorophyll a was negatively correlated with the concentration of nitrogen and phosphorus.
- Pseudanabaena sp.,
- nitrogen,
- phosphorus,
- growth kinetics,
- chlorophyll fluorescence parameters

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