Effect of iron deficiency and iron restoration on ultrastructure of Anacystis nidulans.

Journal of Bacteriology
D M Sherman, L A Sherman

Abstract

The effects of iron deficiency and iron reconstitution on the ultrastructure of the unicellular cyanobacterium Anacystis nidulans R2 were studied by electron microscopy. Low-iron cells, grown with different amounts of aeration, were analyzed at 6, 12, and 24 h after the addition of iron. Low-iron cells had a decrease in the quantities of membranes, phycobilisomes, and carboxysomes and a large increase in glycogen storage granules. In cells aerated with gentle shaking, the addition of iron caused the number of carboxysomes to increase rapidly within 6 h. This was paralleled by a decrease in the quantity of glycogen storage granules. Carboxysomes were associated with the nucleoplasmic face of the inner photosynthetic membrane in normal, but not low-iron, cells; they once more contacted the membrane by 6 h after iron addition. Phycobilisome assembly was apparent by 6 h, and the number of phycobilisomes increased throughout reconstitution. Membrane restoration was accomplished in two stages: (i) components were added to preexisting membranes until about 12 h, and (ii) new membranes were synthesized beginning at 12 to 18 h. Low-iron cells grown by bubbling with air had only one to two concentric layers of membrane per cell. The addi...Continue Reading

References

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Citations

Mar 30, 2001·The Journal of Biological Chemistry·A R GrossmanQ He
Mar 22, 2007·Photosynthesis Research·Abhay K Singh, Louis A Sherman
Oct 2, 2002·Physiologia Plantarum·Stefan SandströmPetter Gustafsson
Jul 25, 2009·Bulletin of Environmental Contamination and Toxicology· Hemlata, Tasneem Fatma
Sep 2, 1998·Proceedings of the National Academy of Sciences of the United States of America·R Schwarz, A R Grossman
Sep 3, 2016·Frontiers in Plant Science·Hanan SchoffmanNir Keren
Oct 22, 2013·Photosynthesis Research·David G WelkieLouis A Sherman
Mar 14, 2017·Biotechnology for Biofuels·Joachim KopkaAlexandra Friedrich
Nov 4, 1998·Archives of Biochemistry and Biophysics·J M García-FernándezF Partensky
Feb 1, 1993·Journal of Bacteriology·A R GrossmanJ L Collier
Jul 13, 2004·Plant Physiology·Nir KerenHimadri B Pakrasi
Sep 1, 1993·Microbiological Reviews·A R GrossmanJ L Collier
Jun 1, 1988·Journal of Bacteriology·H C RiethmanL A Sherman

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