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dc.contributor.authorDi Fenza, Mauro
dc.contributor.authorHogg, Bridget
dc.contributor.authorGrant, Jim
dc.contributor.authorBarth, Susanne
dc.date.accessioned2021-09-29T16:03:24Z
dc.date.available2021-09-29T16:03:24Z
dc.date.issued2017-01-05
dc.identifier.citationDi Fenza M, Hogg B, Grant J, Barth S. 2017. Transcriptomic response of maize primary roots to low temperatures at seedling emergence. PeerJ 5:e2839 https://doi.org/10.7717/peerj.2839en_US
dc.identifier.issn2167-8359
dc.identifier.urihttp://hdl.handle.net/11019/2599
dc.descriptionpeer-revieweden_US
dc.description.abstractBackground. Maize (Zea mays) is a C4 tropical cereal and its adaptation to temperate climates can be problematic due to low soil temperatures at early stages of establishment. Methods. In the current study we have firstly investigated the physiological response of twelve maize varieties, from a chilling condition adapted gene pool, to sub-optimal growth temperature during seedling emergence. To identify transcriptomic markers of cold tolerance in already adapted maize genotypes, temperature conditions were set below the optimal growth range in both control and low temperature groups. The conditions were as follows; control (18 ◦C for 16 h and 12 ◦C for 8 h) and low temperature (12 ◦C for 16 h and 6 ◦C for 8 h). Four genotypes were identified from the condition adapted gene pool with significant contrasting chilling tolerance. Results. Picker and PR39B29 were the more cold-tolerant lines and Fergus and Codisco were the less cold-tolerant lines. These four varieties were subjected to microarray analysis to identify differentially expressed genes under chilling conditions. Exposure to low temperature during establishment in the maize varieties Picker, PR39B29, Fergus and Codisco, was reflected at the transcriptomic level in the varieties Picker and PR39B29. No significant changes in expression were observed in Fergus and Codisco following chilling stress. A total number of 64 genes were differentially expressed in the two chilling tolerant varieties. These two varieties exhibited contrasting transcriptomic profiles, in which only four genes overlapped. Discussion. We observed that maize varieties possessing an enhanced root growth ratio under low temperature were more tolerant, which could be an early and inexpensive measure for germplasm screening under controlled conditions. We have identified novel cold inducible genes in an already adapted maize breeding gene pool. This illustrates that further varietal selection for enhanced chilling tolerance is possible in an already preselected gene pool.en_US
dc.language.isoenen_US
dc.publisherPeerJen_US
dc.relation.ispartofseriesPeerJ;2839
dc.rightsAttribution-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-sa/3.0/us/*
dc.subjectMaizeen_US
dc.subjectCold stressen_US
dc.subjectChilling toleranceen_US
dc.subjectTranscriptomeen_US
dc.subjectRootsen_US
dc.subjectLow temperatureen_US
dc.titleTranscriptomic response of maize primary roots to low temperatures at seedling emergenceen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.7717/peerj.2839
dc.contributor.sponsorIrish Department of Agriculture, Food and the Marineen_US
dc.contributor.sponsorGrantNumberRSF 07 501en_US
dc.source.volume5
dc.source.beginpagee2839
refterms.dateFOA2021-09-29T16:03:25Z


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Attribution-ShareAlike 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-ShareAlike 3.0 United States