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Timing of morphological and ecological innovations in the cyanobacteria--a key to understanding the rise in atmospheric oxygen.
Key evolutionary events in the microbial world may have triggered some of the key geologic upheavals on the Paleoproterozoic Earth.
Knots in the family tree: evolutionary relationships and functions of knox homeobox genes
Preliminary data from the analysis of class I knox gene expression illustrates the evolution of complex patterns of knox expression is likely to have occurred through loss and gain of domains of gene expression.
Development of anonymous cDNA microarrays to study changes to the Senecio floral transcriptome during hybrid speciation
Anonymous microarray analysis revealed dramatic differences in floral gene expression between these four taxa and demonstrates the power of this technique for studies of the genetic impact of hybridization in nonmodel flowering plants.
Morphological and habitat evolution in the Cyanobacteria using a compartmentalization approach
The authors' analyses show that the earliest cyanobacterial lineages were likely unicellular coccoid/ellipsoidal/short rods that lived in terrestrial/freshwater environments while acquiring a large number of more complex traits: sheath, filamentous growth, nitrogen fixation, thermophily, motility, and use of sulphide as an electron donor.
A Neoproterozoic Transition in the Marine Nitrogen Cycle
The Cryogenian is identified as heralding the first appearance of both marine planktonic unicellular nitrogen- fixing cyanobacteria and non-nitrogen-fixing picocyanobacteria, consistent with the existence of open-ocean environmental conditions earlier in the Proterozoic adverse to nitrogen-fixers and their evolution-specifically, insufficient availability of molybdenum and vanadium.
Picocyanobacterial community structure of freshwater lakes and the Baltic Sea revealed by phylogenetic analyses and clade-specific quantitative PCR.
The use of molecular tools for describing and quantifying community structures reveals previously unexplored complexity in the phytoplankton and will facilitate the development of a more sophisticated understanding of community dynamics at the base of the food chains in lakes.
Origin of marine planktonic cyanobacteria
- P. Sánchez‐Baracaldo
- Biology, MedicineScientific reports
- 1 December 2015
It is shown that marine planktonic cyanobacteria evolved from benthic marine and some diverged from freshwater ancestors during the Neoproterozoic (1,000–542 Mya), which represents a key transition in the geochemical evolution of the Earth surface.
Cyanobacterial evolution during the Precambrian
- Bettina E. Schirrmeister, P. Sánchez‐Baracaldo, D. Wacey
- BiologyInternational Journal of Astrobiology
- 29 February 2016
A better understanding of early cyanobacteria evolution will not only allow for a more specific calibration of cyanobacterial and eubacterial phylogenies, but also provide new dates for the tree of life.
The possible evolution and future of CO2-concentrating mechanisms
- J. Raven, J. Beardall, P. Sánchez‐Baracaldo
- Biology, MedicineJournal of experimental botany
- 13 May 2017
The drivers for, and possible timing of, evolution of CCM evolution are examined and the evidence for evolutionary changes in CCM activity and related cellular processes as well as limitations on continuity of CCMs through environmental variations are examined.
Early photosynthetic eukaryotes inhabited low-salinity habitats
- P. Sánchez‐Baracaldo, J. Raven, D. Pisani, A. Knoll
- Biology, MedicineProceedings of the National Academy of Sciences
- 14 August 2017
Phylogenomic and molecular clock analyses show that the chloroplast lineage branched deep within the cyanobacterial tree of life ∼2.1 billion y ago, and ancestral trait reconstruction places this event in low-salinity environments, and suggest that the Archaeplastida and Chlorophyta share a common ancestor that lived ∼1.9 Bya.