Physiology of Anabaena khannae and Chlorococcum humicola under fluoride stress.

Abstract:

:Sodium fluoride showed pH-dependent physiological responses in the two test microalgae Anabaena khannae and Chlorococcum humicola. A. khannae showed severe membrane damage with fluoride at low pH with leakage of pigments and electrolytes. Annihilation of photosynthesis along with inhibition in 14C uptake was observed at pH 6 with 50 mg/L fluoride. While respiration was less affected in the cyanobacterium, C. humicola showed 30 % inhibition in respiratory activity. Resistance of C. humicola to fluoride toxicity has been attributed to the hindrance provided by the thick cell envelope, intracellular compartmentation and increase in extracellular pH as a consequence of its metabolism.

journal_title

Folia microbiologica

authors

Bhatnagar M,Bhatnagar A

doi

10.1007/BF02931045

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

291-6

issue

3

eissn

0015-5632

issn

1874-9356

journal_volume

49

pub_type

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