New Ribonucleic Acid Species Associated with the Formation of the Photosynthetic Apparatus in Euglena gracilis*

Biochemistry ◽  
1962 ◽  
Vol 1 (1) ◽  
pp. 128-131 ◽  
Author(s):  
A. O. Pogo ◽  
George Brawerman ◽  
Erwin Chargaff
Keyword(s):  
Euglena Gracilis ◽  
Ribonucleic Acid ◽  
Photosynthetic Apparatus

The photosynthetic apparatus of Euglena gracilis

1970 ◽  
Vol 138 (2) ◽  
pp. 598-605 ◽  
Author(s):  
Bruno Andrea Melandri ◽  
Assunta Baccarini-Melandri ◽  
Anthony San Pietro
Keyword(s):  
Euglena Gracilis ◽  
Photosynthetic Apparatus

Messenger ribonucleic acid function and protein synthesis in zinc-deficient Euglena gracilis

Biochemistry ◽  
1982 ◽  
Vol 21 (21) ◽  
pp. 5359-5363 ◽  
Author(s):  
L. Gail Crossley ◽  
Kenneth H. Falchuk ◽  
Bert L. Vallee
Keyword(s):  
Protein Synthesis ◽  
Euglena Gracilis ◽  
Ribonucleic Acid ◽  
Messenger Ribonucleic Acid ◽  
Acid Function

Adaptive modifications of the photosynthetic apparatus in Euglena gracilis Klebs exposed to manganese excess

PROTOPLASMA ◽  
2004 ◽  
Vol 224 (3-4) ◽  
pp. 167-177 ◽  
Author(s):  
L. Ferroni ◽  
C. Baldisserotto ◽  
M. P. Fasulo ◽  
A. Pagnoni ◽  
S. Pancaldi
Keyword(s):  
Euglena Gracilis ◽  
Photosynthetic Apparatus

scholarly journals Salt Stress Induces Paramylon Accumulation and Fine-Tuning of the Macro-Organization of Thylakoid Membranes in Euglena gracilis Cells

2021 ◽  
Vol 12 ◽  
Author(s):  
Sai Divya Kanna ◽  
Ildikó Domonkos ◽  
Tímea Ottília Kóbori ◽  
Ágnes Dergez ◽  
Kinga Böde ◽  
...  
Keyword(s):  
Salt Stress ◽  
Euglena Gracilis ◽  
Thylakoid Membrane ◽  
Protein Complexes ◽  
Polyacrylamide Gel Electrophoresis ◽  
Photosynthetic Apparatus ◽  
Cd Spectroscopy ◽  
Fluorescence Yield ◽  
Fine Tuning ◽  
Salt Stress Condition

The effects of salt stress condition on the growth, morphology, photosynthetic performance, and paramylon content were examined in the mixotrophic, unicellular, flagellate Euglena gracilis. We found that salt stress negatively influenced cell growth, accompanied by a decrease in chlorophyll (Chl) content. Circular dichroism (CD) spectroscopy revealed the changes in the macro-organization of pigment-protein complexes due to salt treatment, while the small-angle neutron scattering (SANS) investigations suggested a reduction in the thylakoid stacking, an effect confirmed by the transmission electron microscopy (TEM). At the same time, the analysis of the thylakoid membrane complexes using native-polyacrylamide gel electrophoresis (PAGE) revealed no significant change in the composition of supercomplexes of the photosynthetic apparatus. Salt stress did not substantially affect the photosynthetic activity, as reflected by the fact that Chl fluorescence yield, electron transport rate (ETR), and energy transfer between the photosystems did not change considerably in the salt-grown cells. We have observed notable increases in the carotenoid-to-Chl ratio and the accumulation of paramylon in the salt-treated cells. We propose that the accumulation of storage polysaccharides and changes in the pigment composition and thylakoid membrane organization help the adaptation of E. gracilis cells to salt stress and contribute to the maintenance of cellular processes under stress conditions.

Organization of the Pellicle and the Muciferous Glands in Euglena Gracilis

1970 ◽  
Vol 28 ◽  
pp. 104-105
Author(s):  
Hilton H. Mollenhauer ◽  
W. Evans
Keyword(s):  
Plasma Membrane ◽  
Euglena Gracilis ◽  
Complex Forms ◽  
Secondary Periodicity

The pellicular structure of Euglena gracilis consists of a series of relatively rigid strips (Fig. 1) composed of ridges and grooves which are helically oriented along the cell and which fuse together into a common junction at either end of the cell. The strips are predominantly protein and consist in part of a series of fibers about 50 Å in diameter spaced about 85 Å apart and with a secondary periodicity of about 450 Å. Microtubules are also present below each strip (Fig. 1) and are often considered as part of the pellicular complex. In addition, there may be another fibrous component near the base of the pellicle which has not yet been very well defined.The pellicular complex lies underneath the plasma membrane and entirely within the cell (Fig. 1). Each strip of the complex forms an overlapping junction with the adjacent strip along one side of each groove (Fig. 1), in such a way that a certain amount of sideways movement is possible between one strip and the next.

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