Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)

Bibliographic Details
Main Author:	Evans, Joshua R.
Language:	English
Published:	Ohio University / OhioLINK 2017
Subjects:	Aquatic Sciences Bioinformatics Biology Biostatistics Ecology Evolution and Development Experiments Freshwater Ecology Genetics Molecular Biology Organismal Biology Plant Biology Plant Sciences Systematic photoacclimation red algae gene expression aquatic biology phylogeny photosynthesis
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1501068045787163

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou15010680457871632021-08-03T07:03:35Z Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta) Evans, Joshua R. Aquatic Sciences Bioinformatics Biology Biostatistics Ecology Evolution and Development Experiments Freshwater Ecology Genetics Molecular Biology Organismal Biology Plant Biology Plant Sciences Systematic photoacclimation red algae gene expression aquatic biology phylogeny photosynthesis The strictly freshwater red algal order Batrachospermales has undergone numerous taxonomic rearrangements in the recent past to rectify the paraphyly of its largest genus Batrachospermum. These systematic investigations have led to the description of new genera and species as well as re-circumscription of some taxa. Specimens collected from two locations in southeastern USA were initially identified as being allied to Batrachospermum sensu lato, but could not be assigned to any previously described species. Comparison of DNA sequence data for two gene regions and morphology with other batrachospermalean taxa resulted in the proposal of a new monospecific genus Lympha mucosa gen. et sp. prov. to accommodate these specimens. A phylogeny of L. mucosa showed it is sister to the genus Volatus, but has morphological similarities with Batrachospermum sections Turfosa and Virescentia. This new taxon adds to the freshwater red algal diversity of southeastern USA, a region already known for biodiversity and high endemism of the aquatic flora and fauna.Lympha mucosa occurs in open and shaded sites of temperate streams and is abundant during summer months. Although most freshwater red algal taxa are considered shade-adapted, many species exhibit differences in photosynthetic rates and characteristics that indicate they have a much greater ability to acclimate to higher irradiances. Specimens of L. mucosa were collected from open (sun-acclimated) or shaded (shade-acclimated) sites and were exposed to low (<20 µmol photon m-2 s-1) or high (220 µmol photon m-2 s-1) for 72h in controlled conditions to examine photoacclimation. To observe regulation for this process at the transcriptional level, the L. mucosa plastid genome was assembled to provide sequence data for photosynthetic genes involved with light harvesting machinery. Of the six light-harvesting genes selected, two involved with photosystem I and one involved with phycoerythrin synthesis were downregulated at high light. This is the first evidence of transcriptional regulation as a potential mechanism for acclimation to varying irradiances in a freshwater red alga. 2017-09-19 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1501068045787163 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1501068045787163 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection	NDLTD
language	English
sources	NDLTD
topic	Aquatic Sciences Bioinformatics Biology Biostatistics Ecology Evolution and Development Experiments Freshwater Ecology Genetics Molecular Biology Organismal Biology Plant Biology Plant Sciences Systematic photoacclimation red algae gene expression aquatic biology phylogeny photosynthesis
spellingShingle	Aquatic Sciences Bioinformatics Biology Biostatistics Ecology Evolution and Development Experiments Freshwater Ecology Genetics Molecular Biology Organismal Biology Plant Biology Plant Sciences Systematic photoacclimation red algae gene expression aquatic biology phylogeny photosynthesis Evans, Joshua R. Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)
author	Evans, Joshua R.
author_facet	Evans, Joshua R.
author_sort	Evans, Joshua R.
title	Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)
title_short	Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)
title_full	Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)
title_fullStr	Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)
title_full_unstemmed	Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)
title_sort	transcriptional regulation of select light-harvesting genes during photoacclimation in <i>lympha mucosa</i> gen. et sp. prov. (batrachospermales, rhodophyta)
publisher	Ohio University / OhioLINK
publishDate	2017
url	http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1501068045787163
work_keys_str_mv	AT evansjoshuar transcriptionalregulationofselectlightharvestinggenesduringphotoacclimationinilymphamucosaigenetspprovbatrachospermalesrhodophyta
_version_	1719452747074371584

Transcriptional Regulation of Select Light-Harvesting Genes during Photoacclimation in <i>Lympha mucosa</i> gen. et sp. prov. (Batrachospermales, Rhodophyta)

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