Gossypium hirsutum
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA883829 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR21836500_1.fastq.gz | Fastqsanger.gz | |||
| SRR21836500_2.fastq.gz | Fastqsanger.gz | |||
| SRR21836600_1.fastq.gz | Fastqsanger.gz | |||
| SRR21836600_2.fastq.gz | Fastqsanger.gz | |||
| SRR21836501_1.fastq.gz | Fastqsanger.gz |
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Project description:As part of our research on peroxisome biogenesis, catalase was purified from cotyledons of dark-grown cotton (Gossypium hirsutum L.) seedlings and monospecific antibodies were raised in rabbits. Purified catalase appeared as three distinct electrophoretic forms in non-denaturing gels and as a single protein band (with a subunit Mr of 57,000) on silver-stained SDS/polyacrylamide gels. Western blots of crude extracts and isolated peroxisomes from cotton revealed one immunoreactive polypeptide with the same Mr (57,000) as the purified enzyme, indicating that catalase did not undergo any detectable change in Mr during purification. Synthesis in vitro, directed by polyadenylated RNA isolated from either maturing seeds or cotyledons of dark-grown cotton seedlings, revealed a predominant immunoreactive translation product with a subunit Mr of 57,000 and an additional minor immunoreactive product with a subunit Mr of 64000. Labelling studies in vivo revealed newly synthesized monomers of both the 64000- and 57,000-Mr proteins present in the cytosol and incorporation of both proteins into the peroxisome without proteolytic processing. Within the peroxisome, the 57,000-Mr catalase was found as an 11S tetramer; whereas the 64,000-Mr protein was found as a relatively long-lived 20S aggregate (native Mr approx. 600,000-800,000). The results strongly indicate that the 64,000-Mr protein (catalase?) is not a precursor to the 57,000-Mr catalase and that cotton catalase is translated on cytosolic ribosomes without a cleavable transit or signal sequence.
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Project description:Transcriptome data of two upland cotton and resequencing data of one upland cotton Raw sequence reads
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Project description:BackgroundAn evolutionary model using diploid and allotetraploid cotton species identified 80 % of non-coding transcripts in allotetraploid cotton as being uniquely activated in comparison with its diploid ancestors. The function of the lncRNAs activated in allotetraploid cotton remain largely unknown.ResultsWe employed transcriptome analysis to examine the relationship between the lncRNAs and mRNAs of protein coding genes (PCGs) in cotton leaf tissue under abiotic stresses. LncRNA expression was preferentially associated with that of the flanking PCGs. Selected highly-expressed lncRNA candidates (n = 111) were subjected to a functional screening pilot test in which virus-induced gene silencing was integrated with abiotic stress treatment. From this low-throughput screen, we obtained candidate lncRNAs relating to plant height and tolerance to drought and other abiotic stresses.ConclusionsLow-throughput screen is an effective method to find functional lncRNA for further study. LncRNAs were more active in abiotic stresses than PCG expression, especially temperature stress. LncRNA XLOC107738 may take a cis-regulatory role in response to environmental stimuli. The degree to which lncRNAs are constitutively expressed may impact expression patterns and functions on the individual gene level rather than in genome-wide aggregate.
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Project description:Fiber quality is an important economic index and a major breeding goal in cotton, but direct phenotypic selection is often hindered due to environmental influences and linkage with yield traits. A genome-wide association study (GWAS) is a powerful tool to identify genes associated with phenotypic traits. In this study, we identified fiber quality genes in upland cotton (Gossypium hirsutum L.) using GWAS based on a high-density CottonSNP80K array and multiple environment tests. A total of 30 and 23 significant single nucleotide polymorphisms (SNPs) associated with five fiber quality traits were identified across the 408 cotton accessions in six environments and the best linear unbiased predictions, respectively. Among these SNPs, seven loci were the same, and 128 candidate genes were predicted in a 1-Mb region (±500 kb of the peak SNP). Furthermore, two major genome regions (GR1 and GR2) associated with multiple fiber qualities in multiple environments on chromosomes A07 and A13 were identified, and within them, 22 candidate genes were annotated. Of these, 11 genes were expressed [log2(1 + FPKM)>1] in the fiber development stages (5, 10, 20, and 25 dpa) using RNA-Seq. This study provides fundamental insight relevant to identification of genes associated with fiber quality and will accelerate future efforts toward improving fiber quality of upland cotton.
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Project description:Low dosages of chloramphenicol (25-50 micrograms/ml) brought about a 2-4-fold stimulation of acid phosphatase activity in 48 h-germinated cotton (Gossypium hirsutum) embryos. However, at high concentrations of chloramphenicol (100-1000 micrograms/ml), there was a progressive decline in enzyme activity. The stimulatory effect of the drug on acid phosphatase activity was relatively specific, since no significant stimulation of activities of proteinase, deoxyribonuclease, ribonuclease, o-diphenolase and peroxidase was observed in germinating cotton embryos. Chloramphenicol, however, did promote the activities of isocitric lyase and alkaline phosphatase. Sephadex G-200 chromatography of the enzyme fraction revealed high (230 000)- and low (106 000)-molecular-weight multiple forms of acid phosphatase in the chloramphenicol-treated embryos, in contrast with a single molecular form (mol.wt. 106 000) in the untreated embryos. Thus the treatment of cotton embryos with chloramphenicol induced both a qualitative and a quantitative change in the acid phosphatase activity. Chloramphenicol-stimulated acid phosphatase activity was strongly inhibited when Pi was included in the germination medium. However, the control embryos showed less pronounced inhibition of enzyme activity in presence of Pi ions.
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