Ontology highlight
ABSTRACT:
PROVIDER: PRJNA730084 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR14552566_1.fastq.gz | Fastqsanger.gz | |||
| SRR14552566_2.fastq.gz | Fastqsanger.gz | |||
| SRR14552567_1.fastq.gz | Fastqsanger.gz | |||
| SRR14552567_2.fastq.gz | Fastqsanger.gz | |||
| SRR14552568_1.fastq.gz | Fastqsanger.gz |
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Project description:Reptilian skin coloration is spectacular and diverse, yet little is known about the ontogenetic processes that govern its establishment and the molecular signaling pathways that determine it. Here, we focus on the development of the banded pattern of leopard gecko hatchlings and the transition to black spots in the adult. With our histological analyses, we show that iridophores are present in the white and yellow bands of the hatchling and they gradually perish in the adult skin. Furthermore, we demonstrate that melanophores can autonomously form spots in the absence of the other chromatophores both on the regenerated skin of the tail and on the dorsal skin of the Mack Super Snow (MSS) leopard geckos. This color morph is characterized by uniform black coloration in hatchlings and black spots in adulthood; we establish that their skin is devoid of xanthophores and iridophores at both stages. Our genetic analyses identified a 13-nucleotide deletion in the PAX7 transcription factor of MSS geckos, affecting its protein coding sequence. With our single-cell transcriptomics analysis of embryonic skin, we confirm that PAX7 is expressed in iridophores and xanthophores, suggesting that it plays a key role in the differentiation of both chromatophores. Our in situ hybridizations on whole-mount embryos document the dynamics of the skin pattern formation and how it is impacted in the PAX7 mutants. We hypothesize that the melanophores–iridophores interactions give rise to the banded pattern of the hatchlings and black spot formation is an intrinsic capacity of melanophores in the postembryonic skin.
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Project description:Samples from fruit juice vesicle tissue from three lemon genotypes (Frost Lisbon, Faris "sour" and Faris "sweet") differing in fruit acidity were compared at two developmental timepoints (immature, mature). Faris lemon appears to be a graft chimera with the L2 layer derived from normal acid lemon and layer L1 from Millsweet limetta or a closely related genotype. Fruit of Faris sour and Faris sweet grew on different branches of the same tree, with sour fruit developing on branches with L1 and L2 from acid lemon. genotype: Faris sweet lemon - developmental stage: PO:0007009 FF.01 fruit size 30%,(3-replications); genotype: Faris sweet lemon - developmental stage: PO:0007050 FR.03 late stage of fruit ripening,(3-replications); genotype: Faris acid lemon - developmental stage: PO:0007009 FF.01 fruit size 30%,(3-replications); genotype: Faris acid lemon - developmental stage: PO:0007050 FR.03 late stage of fruit ripening,(3-replications); genotype: Frost Lisbon lemon - developmental stage: PO:0007009 FF.01 fruit size 30%,(3-replications); genotype: Frost Lisbon lemon - developmental stage: PO:0007050 FR.03 late stage of fruit ripening,(3-replications) PLEXdb (http://www.plexdb.org) has submitted this series at GEO on behalf of the original contributor, Mikeal L. Roose. The equivalent experiment is CT1 at PLEXdb.
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Project description:We apply developmental and single cell gene expression analysis to fetal skin of domestic cats, together with genetic characterization of Mendelian color variation, to identify when, where, and how, during fetal development, felid color patterns are established. Prior to the appearance of hair follicle placodes, we identify changes in epidermal thickness that represent a signature of color pattern establishment, and that are preceded by a pre-pattern of gene expression in which the secreted Wnt inhibitor encoded by Dickkopf 4 (Dkk4) plays a central role. We also demonstrate that mutations in Dkk4 underlie the Ticked pattern mutation in cats. Our results bring molecular understanding to how the leopard got its spots, suggest that similar mechanisms underlie periodic color pattern and periodic hair follicle spacing, and provide a genomic framework to explore natural selection for diverse pattern types in wild felids.
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Project description:The use of Biological Control Agents (BCAs) to cope diseases has received considerable attention owing to its high efficiency and environmental safety. The aim of our study was to investigate the potential role of the Pseudomonas mediterranea pre-treatments in the response of lemon [Citrus limon (L.) Burm. f.] against mal secco, this being a devastating citrus disease caused by the fungus Plenodomus tracheiphilus. RNAseq analysis revealed that the fungus induced a marked reprogramming of the transcriptome, but P. Mediterranea pre-treatments strongly reduced lemon leaf transcriptome modifications and limited the amount of the fungus DNA inside the plant tissue. Furthermore, P. mediterranea prevented the down regulation of the genes involved in the effector triggered immunity (ETI) and the deregulation of genes involved in the main phytohormone’s biosynthesis and perception. As far as we know, this work represents the first report on the analysis of P. tracheiphilus-lemon plant-BCA interaction at molecular level.
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