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Elucidation and analyses of the regulatory networks of upland and lowland ecotypes of switchgrass in response to drought and salt stresses

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dc.contributor.authorZuo, Chunmanen
dc.contributor.authorTang, Yuhongen
dc.contributor.authorFu, Haoen
dc.contributor.authorLiu, Yimingen
dc.contributor.authorZhang, Xunzhongen
dc.contributor.authorZhao, Bingyu Y.en
dc.contributor.authorXu, Yingen
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessioned2019-05-31T14:08:24Zen
dc.date.available2019-05-31T14:08:24Zen
dc.date.issued2018-09-24en
dc.description.abstractSwitchgrass is an important bioenergy crop typically grown in marginal lands, where the plants must often deal with abiotic stresses such as drought and salt. Alamo is known to be more tolerant to both stress types than Dacotah, two ecotypes of switchgrass. Understanding of their stress response and adaptation programs can have important implications to engineering more stress tolerant plants. We present here a computational study by analyzing time-course transcriptomic data of the two ecotypes to elucidate and compare their regulatory systems in response to drought and salt stresses. A total of 1,693 genes (target genes or TGs) are found to be differentially expressed and possibly regulated by 143 transcription factors (TFs) in response to drought stress together in the two ecotypes. Similarly, 1,535 TGs regulated by 110 TFs are identified to be involved in response to salt stress. Two regulatory networks are constructed to predict their regulatory relationships. In addition, a time-dependent hidden Markov model is derived for each ecotype responding to each stress type, to provide a dynamic view of how each regulatory network changes its behavior over time. A few new insights about the response mechanisms are predicted from the regulatory networks and the time-dependent models. Comparative analyses between the network models of the two ecotypes reveal key commonalities and main differences between the two regulatory systems. Overall, our results provide new information about the complex regulatory mechanisms of switchgrass responding to drought and salt stresses.en
dc.description.notesThe authors thank Georgia Research Alliance for funding support for the presented study here. The commercial affiliation: Noble Research Institute, LLC provided support in the form of salaries for author YT, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of these authors are articulated in the 'author contributions section'.en
dc.description.sponsorshipGeorgia Research Alliance; Noble Research Institute, LLCen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0204426en
dc.identifier.eissn1932-6203en
dc.identifier.issue9en
dc.identifier.othere0204426en
dc.identifier.pmid30248119en
dc.identifier.urihttp://hdl.handle.net/10919/89660en
dc.identifier.volume13en
dc.language.isoenen
dc.publisherPLOSen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleElucidation and analyses of the regulatory networks of upland and lowland ecotypes of switchgrass in response to drought and salt stressesen
dc.title.serialPLOS ONEen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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