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Query: UNIPROT:P39060 (
endostatin
)
2,284
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Pleurochrysis
genus algae are widely distributed in ocean waters.
Pleurochrysis sp.
algae are popularly known for its coccolithophores.
Calcium carbonate
(CaCO
3
) shells are major components of the coccolithophore, and they are key absorbers of carbondioxide. In this study, we have reported the effects of potassium nitrate (
KNO
3
) concentration on calcium accumulation and total lipid, carbohydrate and protein contents of
Pleurochrysis dentata.
Results obtained from complexometric titration and scanning electron microscopy analysis showed higher rates of CaCO
3
accumulation on
Pleurochrysis dentata
cell surface
.
We have also observed that overall cell size of
Pleurochrysis dentata
reached maximum when it was cultured at 0.75 mmol L
-1
of
KNO
3
. During 10 days of
Pleurochrysis dentata
culture total lipids and carbohydrate contents decreased, with slightly increased protein content. Results obtained from Fourier-Transform Infrared Spectroscopy (FTIR) also reported an increase in protein and decrease in lipids and carbohydrate contents, respectively. Similarly,
Pleurochrysis dentata
cultured at 1 mmol L
-1
concentration of
KNO
3
exhibited the lowest carbohydrate (21.08%) and highest protein (32.87%) contents. Interestingly,
Pleurochrysis dentata
cultured without
KNO
3
exhibited 33.61% of total lipid content which reduced to a total lipid content of 13.67% when cultured at 1 mmol L
-1
concentration of
KNO
3
. Thus, culture medium containing higher than 1 mmol L
-1
of
KNO
3
could inhibit the cell size of
Pleurochrysis dentata
and CaCO
3
accumulation in shells but it could promote its cell growth. For the first time we have reported a relatively complete coccolith structure devoid of its protoplast. In this study, we have also described about the special planar structure of
Pleurochrysis dentata
CaCO
3
shells present on its inner tube of the R unit and parallel to the outer tube of the V unit which we named it as "doornail structure". We believe that this doornail structure provides structural stability and support to the developing coccoliths in
Pleurochrysis dentata
. Also, we have discussed about the "double-disc" structure of coccoliths which are closely arranged and interlocked with each other. The double-disc structure ensures fixation of each coccolith and objecting its free horizontal movement and helps in attaining a complementary coccolith structure.
...
PMID:Effect of KNO
3
on Lipid Synthesis and CaCO
3
Accumulation in
Pleurochrysis dentata
Coccoliths with a Special Focus on Morphological Characters of Coccolithophores. 3185 22
