Glycine max
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA95045 | ENA |
REPOSITORIES: ENA
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Project description:Background: Pollen, the male partner in the reproduction of flowering plants, comprises either two or three cells at maturity. The current knowledge of the pollen transcriptome is limited to the model plant Arabidopsis thaliana, which has tri-cellular pollen grains at maturity. Comparative studies on pollen of other genera, particularly crop plants, are needed to understand the pollen gene networks that are subject to functional and evolutionary conservation. In this study, we used the Affymetrix Soybean GeneChip® to perform transcriptional profiling on mature bi-cellular soybean pollen. Results: Compared to the sporophyte transcriptome, the soybean pollen transcriptome revealed a restricted and unique repertoire of genes, with a significantly greater proportion of specifically expressed genes than is found in the sporophyte tissue. Comparative analysis shows that, among the 37,500 soybean unique transcripts addressed in this study, 10,299 genes (27.46%) are expressed in pollen. Of the pollen-expressed genes, about 9,489 (92.13%) are also expressed in sporophytic tissues, and 810 (7.87%) are selectively expressed in pollen. Overall, the soybean pollen transcriptome shows an enrichment of transcription factors (mostly zinc finger family proteins), cell cycle-related transcripts, signal recognition receptors, ethylene responsive factors, chromatin remodeling factors, and members of the ubiquitin proteasome proteolytic pathway. Moreover, we identify several new pollen-specific candidate genes that might play a significant role in pollen biology. Conclusion: This is the first report of a soybean pollen transcriptional profile. These data extend our current knowledge regarding regulatory pathways that govern the gene regulation and development of pollen. We also demonstrate that pollen is a rich store of regulatory proteins that are essential and sufficient for de novo gene expression. A comparison between transcription factors up-regulated in soybean and those upregulated in Arabidopsis revealed some divergence in the numbers and kinds of regulatory proteins expressed in both species.
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Project description:Gene expression profiles in the bacterial pustule-resistant soybean cultivars
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Project description:Pod size varies among soybean cultivars, but the mechanism is largely unknown. We investigated pod size differences between two cultivars. The larger pod of ‘Tachinagaha’ was due to longer cell proliferation activity than in the shorter pod of ‘Iyodaizu’. Pod size of soybean 9 (GmPSS9), a member of the heat shock protein 70 family, was detected in a major QTL (qPSS on Chr. 2) as a candidate gene for determining pod length by QTL and expression QTL analysis. Expression of GmPSS9 in pods was higher in ‘Tachinagaha’ than in ‘Iyodaizu’ and was highest in early pod development. The difference in expression resulted from an indel polymorphism, Tachinagaha-specific-1, which has a 5′-UTR Py-rich stretch motif that boosts transcription. Treatment with an HSP70 inhibitor reduced plant height, pod length, and pod cell number. Our results identify GmPSS9 as a target gene for pod length which regulates cell number during early pod development.
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Project description:Gene expression profiles in the bacterial pustule-resistant soybean cultivars(2)
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Project description:Tropospheric ozone (O3) is a secondary air pollutant and anthropogenic greenhouse gas. Concentrations of tropospheric O3 have more than doubled since the Industrial Revolution, and are high enough to damage plant productivity. Soybean (Glycine max L. Merr.) is the worldâs most important legume crop and is sensitive to O3. Current ground-level O3 are estimated to reduce global soybean yields by 6% to 16%. In order to understand transcriptional mechanisms of yield loss in soybean, we examined the transcriptome of soybean flower and pod tissues exposed to elevated O3 using RNA-Sequencing.
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Project description:Brassinosteroids (BRs) are a series of sterol hormones in plants, which play important physiological roles in many aspects of plant growth and development processes. Exogenous application of BR and its inhibitors PPZ to investigated the roles of BR in soybean root growth and development. Transcriptome sequencing analysis was performed to identified lots number of differential expression genes(DEGs) by eBL (2,4-epicastasterone, 24-epiCS) and PPZ (propiconazole) treatment of soybean root tips(1 cm).
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