Subcellular pigment distribution is altered under far-red light acclimation in cyanobacteria that contain chlorophyll $$\mathcal{f}$$
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- Washington Univ., St. Louis, MO (United States). Dept. of Chemistry and Biology
- Donald Danforth Plant Science Center, St. Louis, MO (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Bioenergy and Defense Technologies Dept.
- Univ. of Sydney, NSW (Australia). School of Life and Environmental Sciences
Far-Red Light (FRL) acclimation is a process that has been observed in cyanobacteria and algae that can grow solely on light above 700 nm. The acclimation to FRL results in rearrangement and synthesis of new pigments and pigment-protein complexes. Here, cyanobacteria containing chlorophyll $$\mathcal{f}$$,Synechococcus sp. PCC 7335 and Halomicronema hongdechloris, were imaged as live cells with confocal microscopy. H. hongdechloris was further studied with hyperspectral confocal fluorescence microscopy (HCFM) and freeze-substituted thin-section transmission electron microscopy (TEM). Under FRL, phycocyanin-containing complexes and chlorophyll-containing complexes were determined to be physically separated and the synthesis of red-form phycobilisome and Chl $$\mathcal{f}$$ was increased. The timing of these responses was observed. The heterogeneity and eco-physiological response of the cells was noted. Additionally, a gliding motility for H. hongdechloris is reported.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Washington Univ., St. Louis, MO (United States). Photosynthetic Antenna Research Center (PARC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000; SC0001035; NA0003525
- OSTI ID:
- 1472251
- Report Number(s):
- SAND2018-9774J; 667651
- Journal Information:
- Photosynthesis Research, Vol. 134, Issue 2; ISSN 0166-8595
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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