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Independence and Interdependence of the Photoregulation of Pigmentation and Development in Fremyella diplosiphon

Juliana R. Bordowitz, Melissa J. Whitaker and Beronda L. Montgomery

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Many photosynthetic organisms exhibit light-dependent regulation of growth and development, including photoregulation of pigmentation, physiology, and form. We recently demonstrated that the photoregulation of cellular and filament morphology in Fremyella diplosiphon is under control of a photosensory photoreceptor and differentially impacted by photosynthetic pigment accumulation. Biliprotein photoreceptor RcaE controls the light-dependent regulation of pigmentation and of cell and filament morphology in F. diplosiphon, primarily in response to green and red light as a part of a light acclimation process known as complementary chromatic adaptation (CCA). Our recent investigations into the regulation of CCA underscored the largely independent regulation of pigmentation and cell shape by RcaE. However, recent studies on the regulation of phycobiliprotein biosynthesis indicated that filament length may depend upon correct photoregulation of photosynthetic pigment levels. Taken together, these studies suggest that aspects of the regulation of morphology in F. diplosiphon are independent of the regulation of pigmentation, yet other features of morphology depend upon the accurate photoregulation of pigment levels.

Bordowitz JR, Montgomery BL (2008) Photoregulation of cellular morphology during complementary chromatic adaptation requires sensor-kinase-class protein RcaE in Fremyella diplosiphon. J. Bacteriol. 190: 4069-4074 Whitaker MJ, Bordowitz JR, Montgomery BL (2009) CpcF-dependent regulation of pigmentation and development in Fremyella diplosiphon. Biochem. Biophys. Res. Commun. 389: 602-606

Authors

Juliana R. Bordowitz

Department of Energy Plant Research Laboratory and Plant Biology Department; Michigan State University; East Lansing, MI USA

Melissa J. Whitaker

Department of Energy Plant Research Laboratory and Plant Biology Department; Michigan State University; East Lansing, MI USA

Beronda L. Montgomery Corresponding author: montg133@msu.edu

Department of Energy Plant Research Laboratory and Plant Biology Department; Michigan State University; East Lansing, MI USA

This is an open-access article

 Download PDF

If the document does not open, please right-click on the link (control-click on a Macintosh) and select the option to save the file to disk.