AB 19:265-274 (2013)  -  DOI: https://doi.org/10.3354/ab00533

Influences of a submerged macrophyte on colony formation and growth of a green alga

J. Dong1,2, J. J. Lu1,2, G. B. Li1,*, L. R. Song1

1State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
2University of Chinese Academy of Sciences, Beijing 100039, PR China
*Corresponding author. Email:

ABSTRACT: The effects of the submerged macrophyte Ceratophyllum demersum on the growth and morphology of the green alga Scenedesmus obliquus were assessed by conducting co-culture laboratory experiments (15 and 25°C, presence/absence of 3 g fresh wt of C. demersum per litre of water in S. obliquus culture). Growth rate, photosynthetic pigment-based growth, photosynthetic activity and colony formation of S. obliquus increased in the presence of C. demersum. The proportion of 4-celled colonies of S. obliquus increased from 36 to 76% at 25°C, and from 51 to 71% at 15°C in the presence of C. demersum. The induced morphological shift from unicells to colonies in S. obliquus promoted sedimentation to the bottom-water region, thereby providing a competitive advantage for the submerged macrophyte.


KEY WORDS: Scenedesmus obliquus · Ceratophyllum demersum · Growth · Colony formation · Sedimentation


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Cite this article as: Dong J, Lu JJ, Li GB, Song LR (2013) Influences of a submerged macrophyte on colony formation and growth of a green alga. Aquat Biol 19:265-274. https://doi.org/10.3354/ab00533

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