scholarly journals The Histology ofNanomia bijuga(Hydrozoa: Siphonophora)

2014 ◽  
Author(s):  
Samuel H Church ◽  
Stefan Siebert ◽  
Pathikrit Bhattacharyya ◽  
Casey W Dunn
Keyword(s):  
Gene Expression ◽  
Basement Membrane ◽  
Future Studies ◽  
Functional Assays ◽  
Absorptive Cells ◽  
Morphological Organization ◽  
Gene Expression Analyses ◽  
Growth Zones

The siphonophoreNanomia bijugais a pelagic hydrozoan (Cnidaria) with complex morphological organization. Each siphonophore is made up of many asexually produced, genetically identical zooids that are functionally specialized and morphologically distinct. These zooids predominantly arise by budding in two growth zones, and are arranged in precise patterns. This study describes the cellular anatomy of several zooid types as well as of the stem and gas-filled float, called the pneumatophore. The distribution of cellular morphologies across zooid types enhances our understanding of zooid function. The unique absorptive cells in the palpon, for example, indicate specialized intracellular digestive processing in this zooid type. Though cnidarians are usually thought of as mono-epithelial, we characterize at least two cellular populations in this species which are not connected to a basement membrane. This work provides a greater understanding of epithelial diversity within the cnidarians, and will be a foundation for future studies onNanomia bijuga, including functional assays and gene expression analyses.

scholarly journals Nelumbo genome database, an integrative resource for gene expression and variants of Nelumbo nucifera

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Hui Li ◽  
Xingyu Yang ◽  
Yue Zhang ◽  
Zhiyan Gao ◽  
Yuting Liang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Plant Species ◽  
Aquatic Plant ◽  
Molecular Breeding ◽  
Nelumbo Nucifera ◽  
Sequence Analyses ◽  
Genome Database ◽  
Future Studies ◽  
Sacred Lotus ◽  
Coexpression Networks

AbstractSacred lotus (Nelumbo nucifera, or lotus) is one of the most widely grown aquatic plant species with important uses, such as in water gardening and in vegetable and herbal medicine. A public genomic database of lotus would facilitate studies of lotus and other aquatic plant species. Here, we constructed an integrative database: the Nelumbo Genome Database (NGD, http://nelumbo.biocloud.net). This database is a collection of the most updated lotus genome assembly and contains information on both gene expression in different tissues and coexpression networks. In the NGD, we also integrated genetic variants and key traits from our 62 newly sequenced lotus cultivars and 26 previously reported cultivars, which are valuable for lotus germplasm studies. As applications including BLAST, BLAT, Primer, Annotation Search, Variant and Trait Search are deployed, users can perform sequence analyses and gene searches via the NGD. Overall, the valuable genomic resources provided in the NGD will facilitate future studies on population genetics and molecular breeding of lotus.

scholarly journals Unearthing LTR retrotransposon gag genes co-opted in the deep evolution of eukaryotes

2021 ◽  
Author(s):  
Jianhua Wang ◽  
Guan-Zhu Han
Keyword(s):  
Gene Expression ◽  
Selective Pressure ◽  
Ltr Retrotransposon ◽  
Ltr Retrotransposons ◽  
Cellular Functions ◽  
The Family ◽  
Family Level ◽  
Gene Expression Analyses ◽  
Comprehensive Picture ◽  
Gypsy Retrotransposons

Abstract LTR retrotransposons comprise a major component of the genomes of eukaryotes. On occasion, retrotransposon genes can be recruited by their hosts for diverse functions, a process formally referred to as co-option. However, a comprehensive picture of LTR retrotransposon gag gene co-option in eukaryotes is still lacking, with several documented cases exclusively involving Ty3/Gypsy retrotransposons in animals. Here we use a phylogenomic approach to systemically unearth co-option of retrotransposon gag genes above the family level of taxonomy in 2,011 eukaryotes, namely co-option occurring during the deep evolution of eukaryotes. We identify a total of 14 independent gag gene co-option events across more than 740 eukaryote families, eight of which have not been reported previously. Among these retrotransposon gag gene co-option events, nine, four, and one involve gag genes of Ty3/Gypsy, Ty1/Copia, and Bel-Pao retrotransposons, respectively. Seven, four, and three co-option events occurred in animals, plants, and fungi, respectively. Interestingly, two co-option events took place in the early evolution of angiosperms. Both selective pressure and gene expression analyses further support that these co-opted gag genes might perform diverse cellular functions in their hosts, and several co-opted gag genes might be subject to positive selection. Taken together, our results provide a comprehensive picture of LTR retrotransposon gag gene co-option events that occurred during the deep evolution of eukaryotes, and suggest paucity of LTR retrotransposon gag gene co-option during the deep evolution of eukaryotes.

scholarly journals Gene expression analyses reveal metabolic specifications in acute O2-sensing chemoreceptor cells

2017 ◽  
Vol 595 (18) ◽  
pp. 6091-6120 ◽  
Author(s):  
Lin Gao ◽  
Victoria Bonilla-Henao ◽  
Paula García-Flores ◽  
Ignacio Arias-Mayenco ◽  
Patricia Ortega-Sáenz ◽  
...  
Keyword(s):  
Gene Expression ◽  
Gene Expression Analyses ◽  
Chemoreceptor Cells ◽  
O2 Sensing
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