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

Abstract

AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections 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: ligb@ihb.ac.cn 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 Full text in pdf format PreviousNextCite 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 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 19, No. 3. Online publication date: November 11, 2013 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2013 Inter-Research.