Effects of salinity and nutrients on the growth and chlorophyll fluorescence of <i>Caulerpa lentillifera</i> -- Journal of Oceanology and Limnology,2015,33(2):410-418

	Cite this paper:
	GUO Hui, YAO Jianting, SUN Zhongmin, DUAN Delin. Effects of salinity and nutrients on the growth and chlorophyll fluorescence of Caulerpa lentillifera[J]. Journal of Oceanology and Limnology, 2015, 33(2): 410-418

Effects of salinity and nutrients on the growth and chlorophyll fluorescence of Caulerpa lentillifera

GUO Hui^1,2, YAO Jianting¹, SUN Zhongmin¹, DUAN Delin¹

1 Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Abstract:

Caulerpa lentillifera is a green algae that distributes worldwide and is cultivated for food. We assessed vegetative propagation of C. lentillifera by measuring the specific growth rate (SGR) and chlorophyll fluorescence of the green algae cultured at different salinities and nutrient levels. The results indicated that C. lentillifera can survive in salinities ranging from 20 to 50, and can develop at salinities of 30 to 40. The maximum SGR for C. lentillifera occurred at a salinity of 35. Both chlorophyll content and the ratio of variable to maximum fluorescence (F_v/F_m) were also at a maximum at a salinity of 35. Photosynthesis was inhibited in salinities greater than 45 and less than 25. Both the maximum SGR and maximum chlorophyll content were found in algae treated with a concentration of 0.5 mmol/L of NO₃-N and 0.1 mmol/L of PO₄-P. The photosynthetic capacity of photosystem II (PSII) was inhibited in cultures of C. lentillifera at high nutrient levels. This occurred when NO₃-N concentrations were greater than 1.0 mmol/L and when PO₄-P concentrations were at 0.4 mmol/L. As there is strong need for large-scale cultivation of C. lentillifera, these data contribute important information to ensure optimal results.

Received: 2014-04-29 Revised: 2014-07-22

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Articles by GUO Hui

Articles by YAO Jianting

Articles by SUN Zhongmin

Articles by DUAN Delin

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