Effect of low temperature on eutrophicated waterbody restoration by Spirodela polyrhiza

• Published in: Bioresource technology Vol. 97; no. 15; pp. 1865 - 1869
• Main Authors: Song, Guanling, Hou, Wenhua, Wang, Qunhui, Wang, Jianlong, Jin, Xiangcan
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.2006; Elsevier Science
• Subjects: Antioxidants - metabolism; Araceae - growth & development; Araceae - physiology; Biological and medical sciences; Biological treatment of waters; Biotechnology; Catalase - metabolism; Chlorophyll - metabolism; Daucus; Ecological restoration; Environment and pollution; Enzymes - metabolism; Eutrophication; Fundamental and applied biological sciences. Psychology; Industrial applications and implications. Economical aspects; Low temperature; Malondialdehyde - metabolism; Oxidative Stress; Peroxidases - metabolism; Plant Roots - growth & development; Polyrhiza; Spirodela polyrhiza; Superoxide Dismutase - metabolism; Temperature; Water Purification - methods; Ecological restoration; Spirodela polyrhiza; Low temperature; Eutrophication; Monocotyledones; Lemnaceae; Angiospermae; Spermatophyta; Stream; Ecological recovery; Aquatic plant
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2005.08.012

Spirodela polyrhiza exposed to low temperature was investigated to study the possible application for recovering eutrophicated waterbody at 10–12 °C. The cell growth and enzymatic resistance to oxidative stress were compared with that grown at optimum temperature (26–28 °C). The frond number, fresh weight, soluble protein, chlorophyll, carrot pigment, root length, peroxidase (POD), catalase (CAT), superoxide dismutase (SOD) and malondialdehyde (MDA) were measured. The results demonstrated that the cell growth, the synthesis and absorption ability decreased and the protective enzymes increased. S. polyrhiza encountered seriously oxidative damage at such low temperature condition, and it was not suitable for recovering the eutrophicated natural waterbody at low temperature of 10–12 °C.