Maize maintains growth in response to decreased nitrate supply through a highly dynamic and developmental stage-specific transcriptional response
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ArticleAuthors
Plett, DarrenBaumann, Ute
Schreiber, Andreas W.
Holtham, Luke
Kalashyan, Elena
Toubia, John
Nau, John
Beatty, Mary
Rafalski, Antoni
Dhugga, Kanwarpal S.
Tester, Mark A.

Garnett, Trevor
Kaiser, Brent N.
KAUST Department
Biological and Environmental Science and Engineering (BESE) DivisionCenter for Desert Agriculture
Plant Science
The Salt Lab
Date
2015-06-02Online Publication Date
2015-06-02Print Publication Date
2016-01Permanent link to this record
http://hdl.handle.net/10754/556195
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Elucidation of the gene networks underlying the response to N supply and demand will facilitate the improvement of the N uptake efficiency of plants. We undertook a transcriptomic analysis of maize to identify genes responding to both a non-growth-limiting decrease in NO3- provision and to development-based N demand changes at seven representative points across the life cycle. Gene co-expression networks were derived by cluster analysis of the transcript profiles. The majority of NO3--responsive transcription occurred at 11 (D11), 18 (D18) and 29 (D29) days after emergence, with differential expression predominating in the root at D11 and D29 and in the leaf at D18. A cluster of 98 probe sets was identified, the expression pattern of which is similar to that of the high-affinity NO3- transporter (NRT2) genes across the life cycle. The cluster is enriched with genes encoding enzymes and proteins of lipid metabolism and transport, respectively. These are candidate genes for the response of maize to N supply and demand. Only a few patterns of differential gene expression were observed over the entire life cycle; however, the composition of the classes of the genes differentially regulated at individual time points was unique, suggesting tightly controlled regulation of NO3--responsive gene expression. © 2015 Society for Experimental Biology, Association of Applied Biologists and John Wiley & Sons Ltd.Citation
Maize maintains growth in response to decreased nitrate supply through a highly dynamic and developmental stage-specific transcriptional response 2015:n/a Plant Biotechnology JournalPublisher
WileyJournal
Plant Biotechnology JournalPubMed ID
26038196Additional Links
http://doi.wiley.com/10.1111/pbi.12388ae974a485f413a2113503eed53cd6c53
10.1111/pbi.12388
Scopus Count
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