Desiccation induced nitrate and ammonium uptake in the red alga Catenella repens (Rhodophyta, Gigartinales)

Nitrate and ammonium uptake rates were measured under laboratory conditions for the intertidal mangrove alga Catenella repens when the thalli were desiccated to 0-60% and resubmerged. An enhancement in the nitrate and ammonium uptake was seen in plants desiccated up to 20-40%. These enhanced rates w...

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Bibliographic Details
Published in:Indian journal of marine sciences 1999-12, Vol.28 (4), p.458-460
Main Authors: DATTA, R, DATTA, B. K
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Autoecology
Biological and medical sciences
Brackish
Catenella caespitosa
Fundamental and applied biological sciences. Psychology
Plants and fungi
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Summary:Nitrate and ammonium uptake rates were measured under laboratory conditions for the intertidal mangrove alga Catenella repens when the thalli were desiccated to 0-60% and resubmerged. An enhancement in the nitrate and ammonium uptake was seen in plants desiccated up to 20-40%. These enhanced rates were 1.76 (for nitrate) and 1.42 (for ammonium) times higher than the uptake rates of fully hydrated plants (control). After desiccation, the enhancement in the nitrate uptake rates on resubmergence lasted much longer than the increase in ammonium uptake. The degree and duration of this enhancement in nitrate uptake due to desiccation must be aiding the alga in the procurement of nitrogen.
ISSN:0379-5136
0975-1033