Light Quantity Affects the Regulation of Cell Shape in Fremyella diplosiphon.

Frontiers in Microbiology
Bagmi PattanaikBeronda L Montgomery

Abstract

In some cyanobacteria, the color or prevalent wavelengths of ambient light can impact the protein or pigment composition of the light-harvesting complexes. In some cases, light color or quality impacts cellular morphology. The significance of changes in pigmentation is associated strongly with optimizing light absorption for photosynthesis, whereas the significance of changes in light quality-dependent cellular morphology is less well understood. In natural aquatic environments, light quality and intensity change simultaneously at varying depths of the water column. Thus, we hypothesize that changes in morphology that also have been attributed to differences in the prevalent wavelengths of available light may largely be associated with changes in light intensity. Fremyella diplosiphon shows highly reproducible light-dependent changes in pigmentation and morphology. Under red light (RL), F. diplosiphon cells are blue-green in color, due to the accumulation of high levels of phycocyanin, a RL-absorbing pigment in the light-harvesting complexes or phycobilisomes (PBSs), and the shape of cells are short and rounded. Conversely, under green light (GL), F. diplosiphon cells are red in color due to accumulation of GL-absorbing phycoer...Continue Reading

Citations

Mar 5, 2013·Biochemical and Biophysical Research Communications·Shailendra P Singh, Beronda L Montgomery
Nov 26, 2015·Frontiers in Microbiology·Shailendra P Singh, Beronda L Montgomery
Jun 16, 2015·Frontiers in Microbiology·Beronda L Montgomery
May 10, 2013·Plant Signaling & Behavior·Shailendra P Singh, Beronda L Montgomery
Jul 16, 2014·Frontiers in Bioengineering and Biotechnology·Beronda L Montgomery
Sep 12, 2013·Marine Drugs·Parisa HeydarizadehMartine Bertrand
Sep 11, 2019·Annual Review of Microbiology·Joseph E SanfilippoDavid M Kehoe
Sep 25, 2019·International Journal of Molecular Sciences·Fong-Yi LinYung-Shin Sun

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Methods Mentioned

BETA
confocal microscopy
FCS

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