The effects of current velocity on the photosynthesis of Callitriche stagnalis scop.
1983; Elsevier BV; Volume: 15; Issue: 2 Linguagem: Inglês
10.1016/0304-3770(83)90028-1
ISSN1879-1522
AutoresTom Vindbæk Madsen, Martin Søndergaard,
Tópico(s)Plant Parasitism and Resistance
ResumoThe effects of current velocity on the photosynthesis of the submerged angiosperm Callitriche stagnalis Scop. were investigated by CO2-exchange in a closed water-flow system. Apparent photosynthesis was stimulated by increasing velocities and a maximum rate was reached at 8–12 mm s−1. Increasing the velocity to 20 and 40 mm s−1 reduced the photosynthetic rates by 5–30% and 13–29%, respectively. It is suggested that the inhibition of photosynthesis at high velocities is caused by agitation of the incubated plant material. The ecological significance of this result is discussed briefly.
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