Journal of Plant Research

, Volume 106, Issue 2, pp 113-120

First online:

Probable effects of algal bloom on the growth ofPhragmites australis (Cav.) Trin. ex Steud.

  • Shiori YamasakiAffiliated withBiological Laboratory, Wayo Women's University

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The effects of blue-green algal blooms on an emergent reed plant,Phragmites australis (Cav.) Trin. ex Steud., were investigated in a eutrophic lake in central Japan. The plants showed conspicuous withering of bottom leaves in spring of 1982, after an early occurrence of the bloom. In June, the plants in the area of algal infestation had about half the shoot length and dry weight of normalP. australis without the algal infestation. Reductions in water transparency, dissolved oxygen in bottom water and redox potentials of surface soil corresponded to the presence of algal bloom and plant damage.

Key words

Microcystis aeruginosa Oxygen concentration Redox potential Withering