Category: Dinoflagellate genomics

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 …

Related Articles
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:…

Microscopic interactions between phycosphere microbiota and host algae play crucial roles in aquatic ecosystems. Despite their significance, there is a scarcity of available genome sequences derived from the phycosphere microbiome. Here, we report the draft genome sequences of nine heterotrophic proteobacterial strains isolated from the toxic dinoflagellate Alexandrium catenella LZT09 during execution of our Phycosphere Microbiome Project. Further exploration of the genomic features of the…

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Chloroplast mRNAs are 3′ polyuridylylated in the green alga Pithophora roettleri (Cladophorales).
J Phycol. 2020 May 28;:
Authors: Meade MJ, Proulex GCR, Manoylov KM, Cahoon AB
Abstract
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Species within the green algal order Cladophorales have an unconventional plastome structure where individual coding regions or small numbers of genes occur as linear single-stranded DNAs folded into hairpin structures. Another group of photosynthetic organisms with an equivalently reduced chloroplast genome are the peridinin dinoflagellates of the Alveolata eukaryotic lineage whose plastomes are mini-circles carrying one or a few genes required for photosynthesis. One unusual aspect of the…

Genomes of the dinoflagellate Polarella glacialis encode tandemly repeated single-exon genes with adaptive functions.
BMC Biol. 2020 May 24;18(1):56
Authors: Stephens TG, González-Pech RA, Cheng Y, Mohamed AR, Burt…