Phylogenetic position of endosymbiotic green algae in Paramecium bursaria Ehrenberg from Japan

Plant Biology
Ryo HoshinaN Imamura

Abstract

Endosymbiotic green algae of Japanese Paramecium bursaria were phylogenetically analyzed based on DNA sequences from the ribosomal DNA operon (18S rDNA, ITS1, 5.8S rDNA, and ITS2). Phylogenetic trees constructed using 18S rDNA sequences showed that the symbionts belong to the Chlorella sensu stricto (Trebouxiophyceae) group. They are genetically closer to the C. vulgaris Beijerinck group than to C. kessleri Fott et Nováková as proposed previously. Branching order in C. vulgaris group was unresolved in 18S rDNA trees. Compared heterogeneities of 18S rDNA, ITS1, 5.8S r, and ITS2 among symbionts and two Chlorella species, indicated that the ITS2 region (and probably also ITS1) is better able to resolve phylogenetic problems in such closely related taxa. All six symbiotic sequences obtained here (approximately 4000-bp sequences of 18S rDNA, ITS1, 5.8S rDNA, and ITS2) were completely identical in each, strongly suggesting a common origin.

References

Feb 1, 1990·Plant Molecular Biology·J A WaddleR H Meints
Feb 11, 1989·Nucleic Acids Research·V A Huss, M L Sogin
Apr 1, 1988·Proceedings of the National Academy of Sciences of the United States of America·W R Pearson, D J Lipman
Jan 1, 1985·Journal of Molecular Evolution·M HasegawaT Yano
Jan 1, 1984·Journal of Molecular Evolution·C LanaveG Serio
Jan 1, 1981·Journal of Molecular Evolution·J Felsenstein
Jul 1, 1994·Journal of Molecular Evolution·Z Yang
Nov 1, 1996·Molecular Biology and Evolution·M A Hershkovitz, L A Lewis
Jun 26, 2003·Nucleic Acids Research·Michael Zuker
Jul 1, 1985·Evolution; International Journal of Organic Evolution·Joseph Felsenstein

❮ Previous
Next ❯

Citations

Mar 30, 2012·Environmental Science & Technology·Kelly L LeBlancDirk Wallschläger
Jan 1, 2010·Microbes and Environments·Ryo Hoshina
Oct 16, 2009·Ecotoxicology and Environmental Safety·Jayne F RobertsOliver R Price
Oct 16, 2007·Protist·Ryo Hoshina, Nobutaka Imamura
Apr 4, 2006·The Journal of Eukaryotic Microbiology·Shin-ichiro Kamako, Nobutaka Imamura
Sep 30, 2010·Environmental Microbiology·Thomas PröscholdLothar Krienitz

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.