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

• Published in: Chinese journal of oceanology and limnology Vol. 33; no. 2; pp. 410 - 418
• Main Author: 郭辉 姚建亭 孙忠民 段德麟
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01.03.2015; Science Press; Springer Nature B.V
• Subjects: Abiotic stress; Algae; Aquatic plants; Biology; Caulerpa; Caulerpa lentillifera; Chlorophyll; Chlorophylls; Chlorophyta; Earth and Environmental Science; Earth Sciences; Fluorescence; Growth rate; Legumes; nitrate nitrogen; Nutrient concentrations; nutrient content; Nutrients; Oceanography; Phosphates; Photosynthesis; Photosystem II; Plant growth; Plant propagation; Propagation; Salinity; Salinity effects; specific growth rate; Survival; vegetative propagation; 叶绿素含量; 叶绿素荧光; 生长速率; 盐度; 营养水平; 蕨; 藻类分布; 规模种植; salinity; ratio of variable to maximum fluorescence; non-photochemical quenching (NPQ); specific growth rate (SGR); ); nutrient level; /
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/s00343-015-4105-y

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 PO_4-P. The photosynthetic capacity of photosystem Ⅱ （PSⅡ） was inhibited in cultures of C. lentillifera at high nutrient levels. This occurred when NO_3-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.