Gloeobacter and the implications of a freshwater origin of Cyanobacteria

TY - JOUR

T1 - Gloeobacter and the implications of a freshwater origin of Cyanobacteria

AU - Raven, John A.

AU - Sánchez-Baracaldo, Patricia

N1 - Funding - Royal Society University Research Fellowship

PY - 2021

Y1 - 2021

N2 - The earliest branching cyanobacterium, Gloeobacter, exhibits a number of ancestral traits including the lack of thylakoids. It occurs epilithically in microbial mats, both subaerially and submerged in low-salinity habitats. These habitats and the absence of thylakoids are associated with the occurrence of membrane-associated photosynthetic processes in the plasma membrane, possibly limiting the rate of both assembly and reassembly of the oxygen-evolving complex, as well as the photosynthetic rate and in vitro growth rate. These factors interact with the occurrence of Gloeobacter in mats to constrain productivity in nature. Traits found in living Gloeobacter, with the probable time of origin of oxygenic photosynthesis and diversification of cyanobacteria, can be related to the possible role of oxygenic primary productivity and organic carbon burial on land during the early Earth in low-salinity environments around the time of the global oxidation event.

AB - The earliest branching cyanobacterium, Gloeobacter, exhibits a number of ancestral traits including the lack of thylakoids. It occurs epilithically in microbial mats, both subaerially and submerged in low-salinity habitats. These habitats and the absence of thylakoids are associated with the occurrence of membrane-associated photosynthetic processes in the plasma membrane, possibly limiting the rate of both assembly and reassembly of the oxygen-evolving complex, as well as the photosynthetic rate and in vitro growth rate. These factors interact with the occurrence of Gloeobacter in mats to constrain productivity in nature. Traits found in living Gloeobacter, with the probable time of origin of oxygenic photosynthesis and diversification of cyanobacteria, can be related to the possible role of oxygenic primary productivity and organic carbon burial on land during the early Earth in low-salinity environments around the time of the global oxidation event.

KW - Cyanobacterial mats

KW - Global oxidation event

KW - Gloeobacter

KW - Non-marine habitats

KW - Oxygen evolution complex

KW - Photosynthesis

UR - https://www.scopus.com/pages/publications/85103893993

U2 - 10.1080/00318884.2021.1881729

DO - 10.1080/00318884.2021.1881729

M3 - Article

AN - SCOPUS:85103893993

SN - 0031-8884

VL - 60

SP - 402

EP - 418

JO - Phycologia

JF - Phycologia

IS - 5

ER -