Category: Dinoflagellate genomics

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An assessment on the intrapopulational and intraindividual genetic diversity in LSU rDNA in the harmful algal blooms-forming dinoflagellate Margalefidinium (= Cochlodinium) fulvescens based on clonal cultures and bloom sample…

Large subunit ribosomal DNA (LSU rDNA) sequences have been increasingly used to infer the phylogeny and species identity of organisms, a few previous studies, however, have observed high intraspecific and even intraindividual variability in LSU rDNA in some dinoflagellate species due to, assumably, large copy numbers of rDNA in dinoflagellates. Since the copy number of LSU rDNA varies tremendously among dinoflagellate species, the intraspecific and intraindividual diversity for a species of…

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Sex in Symbiodiniaceae dinoflagellates: genomic evidence for independent loss of the canonical synaptonemal complex.
Sci Rep. 2020 Jun 17;10(1):9792
Authors: Shah S, Chen Y, Bhattacharya D, Chan CX
…

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Lineage dynamics of the endosymbiotic cell type in the soft coral Xenia.
Nature. 2020 Jun 17;:
Authors: Hu M, Zheng X, Fan CM, Zheng Y
Abstract
Many corals harbour symbiotic dinoflag…

Dinoflagellates of the Symbiodiniaceae family encompass diverse symbionts that are critical to corals and other species living in coral reefs. It is well known that sexual reproduction enhances adaptive evolution in changing environments. Although genes related to meiotic functions were reported in Symbiodiniaceae, cytological evidence of meiosis and fertilisation are however yet to be observed in these taxa. Using transcriptome and genome data from 21 Symbiodiniaceae isolates, we studied genes…

Many corals harbour symbiotic dinoflagellate algae. The algae live inside coral cells in a specialized membrane compartment known as the symbiosome, which shares the photosynthetically fixed carbon with coral host cells while host cells provide inorganic carbon to the algae for photosynthesis¹. This endosymbiosis-which is critical for the maintenance of coral reef ecosystems-is increasingly threatened by environmental stressors that lead to coral bleaching (that is, the disruption of…

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Characterization of a giant photosystem I supercomplex in the symbiotic dinoflagellate Symbiodiniaceae.
Plant Physiol. 2020 Jun 16;:
Authors: Kato H, Tokutsu R, Kubota-Kawai H, Burton-Smith RN, Kim …

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Characterization of a giant photosystem I supercomplex in the symbiotic dinoflagellate Symbiodiniaceae.
Plant Physiol. 2020 Jun 16;:
Authors: Kato H, Tokutsu R, Kubota-Kawai H, Burton-Smith RN, Kim …

Symbiodiniaceae are symbiotic dinoflagellates that provide photosynthetic products to corals. Because corals are distributed across a wide range of depths in the ocean, Symbiodiniaceae species must adapt to various light environments to optimize their photosynthetic performance. However, as few biochemical studies of Symbiodiniaceae photosystems have been reported, the molecular mechanisms of photoadaptation in this algal family remain poorly understood. Here, to investigate the photosynthetic…

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Draft Genome Sequences of Nine Cultivable Heterotrophic Proteobacteria Isolated from Phycosphere Microbiota of Toxic Alexandrium catenella LZT09.
Microbiol Resour Announc. 2020 May 28;9(22):
Authors:…