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Sexual differences in the gonochoristic tardigrade Paramacrobiotus metropolitanus,

ABSTRACT: Sexual differences in the gonochoristic tardigrade Paramacrobiotus metropolitanus,

PROVIDER: PRJNA1064883 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27549187_1.fastq.gz	Fastqsanger.gz
	SRR27549187_2.fastq.gz	Fastqsanger.gz
	SRR27549188_1.fastq.gz	Fastqsanger.gz
	SRR27549188_2.fastq.gz	Fastqsanger.gz
	SRR27549189_1.fastq.gz	Fastqsanger.gz

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Sexual differences in the gonochoristic tardigrade Paramacrobiotus metropolitanus,

Project description:Sex dimorphism is a diversification that can be observed in single species of gonochoristic animals. Phylum Tardigrada exhibits remarkable diversity in sex dimorphism in its morphology and behavior. Despite the wealth of genomic and zoological knowledge accumulating, sexual genetic differences of tardigrades have been identified yet. In this study, we focused on the gonochoristic species Paramacrobiotus metropolitanus, employing omics analyses to unravel the basis of sex differences. Approximately 2,000 male-biased expression genes were concentrated in 29 non-male-specific genomic loci, of which two paralogs of a new Doublesex-Mab-3-related (DM) subfamily specific to Macrobiotidae were discovered. We also identified several tardigrade specific anhydrobiosis genes exhibiting sex-biased　expression, suggesting a potential role in protecting sex-specific gametes. The existence of male-biased, but not male specific genomic loci and the limited conservation of the newly identified dimorphically-expressed DM subfamily would provide the foundation for understanding the diverse sex determination cascade in tardigrades.

2024-06-26 | GSE253242 | GEO

Project description:Sexual differences in the gonochoristic tardigrade Paramacrobiotus metropolitanus

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Sexual differences in physiological and transcriptional responses to salinity stress of Salix linearistipularis

Project description:RNA sequencing was performed to investigate the sexual differences of Salix linearistipularis salt tolerance

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The tardigrade Hypsibius exemplaris dramatically upregulates DNA repair pathway genes in response to ionizing radiation [IR_RNA-seq]

Project description:Tardigrades can survive remarkable doses of ionizing radiation, up to about 1000 times the lethal dose for humans. How they do so is incompletely understood. We found that the tardigrade Hypsibius exemplaris suffers DNA damage upon gamma irradiation, but damage is repaired. We show that this tardigrade has a specific and robust response to ionizing radiation: irradiation induces a rapid upregulation of many DNA repair genes. This upregulation is unexpectedly extreme, making some DNA repair transcripts among the most abundant transcripts in the animal. By expressing tardigrade genes in bacteria, we validate that increased expression of some repair genes can suffice to increase radiation tolerance. We show that at least one such gene is important for tardigrade radiation tolerance. We hypothesize that tardigrades’ ability to sense ionizing radiation and massively upregulate specific DNA repair pathway genes may represent an evolved solution for maintaining DNA integrity.

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Transcriptome analysis of the extremophile tardigrade Hypsibius exemplaris exposed to the DNA-damaging agent bleomycin

Project description:Transcriptome analysis of the extremophile tardigrade Hypsibius exemplaris exposed to the DNA-damaging agent bleomycin

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The tardigrade Hypsibius exemplaris dramatically upregulates DNA repair pathway genes in response to ionizing radiation [Bleo_RNA-seq]

Project description:Tardigrades can survive remarkable doses of ionizing radiation, up to about 1000 times the lethal dose for humans. How they do so is incompletely understood. We found that the tardigrade Hypsibius exemplaris suffers DNA damage upon gamma irradiation, but damage is repaired. We show that tardigrades have a specific and robust response to ionizing radiation: irradiation induces a rapid and dramatic upregulation of many DNA repair genes. By expressing tardigrade genes in bacteria, we validate that increased expression of some repair genes can suffice to increase radiation tolerance. We show that at least one such gene is necessary for tardigrade radiation tolerance. Tardigrades’ ability to sense ionizing radiation and massively upregulate specific DNA repair pathway genes may represent an evolved solution for maintaining DNA integrity.

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Transcriptional profiling analysis in Populus yunnanensis provides insights into the molecular mechanisms of sexual differences in plant salinity tolerance

Project description:In the present study, we compared transcriptional response to salinity between male and female individuals of Populus yunnanensis. We found that several functional groups of genes involved in important pathways were differentially expressed, including photosynthesis-related genes which were mainly up-regulated in males but down-regulated in females. This gene expression pattern is consistent with physiological observation that salinity inhibited photosynthetic capacity more in females than in males. In conclusion, our study provided molecular evidence of sexual differences in poplar salinity tolerance. Identified sex-related genes in salinity tolerance and their functional groups will enhance our understanding of sexual differences to salinity stress at the transcription level.

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Sexual differences in physiological and transcriptional responses to salinity stress of Salix linearistipularis

Project description:Sexual differences in physiological and transcriptional responses to salinity stress of Salix linearistipularis

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Transcriptional profiling analysis in Populus yunnanensis provides insights into the molecular mechanisms of sexual differences in plant salinity tolerance

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Spenito-dependent metabolic sexual dimorphism intrinsic to fat storage cells

Project description:Metabolism in males and females is distinct. Differences are usually linked to sexual reproduction, with circulating signals (e.g. hormones) playing major roles. By contrast, sex differences prior to sexual maturity and intrinsic to individual metabolic tissues are less understood. We analyzed Drosophila melanogaster larvae and find that males store more fat than females, the opposite of the sexual dimorphism in adults. We show that metabolic differences are intrinsic to the major fat storage tissue, including many differences in the expression of metabolic genes. Our previous work identified fat storage roles for Spenito (Nito), a conserved RNA-binding protein and regulator of sex determination. Nito knockdown specifically in the fat storage tissue abolished fat differences between males and females. We further show that Nito is required for sex-specific expression of the master regulator of sex determination, Sex-lethal (Sxl). “Feminization” of fat storage cells via tissue-specific overexpression of a Sxl target gene made larvae lean, reduced the fat differences between males and females, and induced female-like metabolic gene expression. Altogether, this study supports a model in which Nito autonomously controls sexual dimorphisms and differential expression of metabolic genes in fat cells in part through its regulation of the sex determination pathway.

2023-04-25 | GSE229991 | GEO

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