Effect of organic forms of phosphorus and variable concentrations of sulfide on the metabolic generation of soluble-reactive phosphate by sulfur chemolithoautotrophs: a laboratory study.
In aquatic systems, recycling of phosphorus (P) is strongly influenced by microbial metabolic responses. This study was designed to look at the generation of P (as soluble-reactive phosphate (SRP)) from organic P-enriched sediments by benthic sulfur chemolithoautotrophs. The study revealed that microbial density was greater in organic P-enriched sediments when compared to sediments without added organic P and the presence of organic P significantly influenced mobilization of SRP from sediment. Generation of SRP by sediment microbes was cumulative, dependent on time. The results indicated dissolved sulfide (S(2-)) to be necessary for initiation of the metabolism-related mobilization of P: there was no statistically significant effect of variations in ambient concentrations of sulfide (S(2-)). The results elucidate possible outcomes of addition of organic P in aquatic ecosystems.
PG Department of Zoology, Raja NL Khan Women's College, Vidyasagar University, Midnapore, West Bengal, India. rahi7053@gmail.com
Himadri
H
Guhathakurta
Raka
R
Biswas
Prabuddha
P
Dey
Piyali Gajendra
PG
Mahapatra
Bipasha
B
Mondal
D001419:Bacteria / Q000737:chemistry / Q000145:classification / Q000378:metabolism*; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D019015:Geologic Sediments / Q000382:microbiology*; D010755:Organophosphates / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism*; D013440:Sulfides / Q000378:metabolism*
D010755:Organophosphates; D010710:Phosphates; D013440:Sulfides; D002734:Chlorophyll; D000077194:Chlorophyll A