Physiological and Molecular Traits Associated with Nitrogen Uptake under Limited Nitrogen in Soft Red Winter Wheat

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dc.contributor.authorLamichhane, Sumanen
dc.contributor.authorMurata, Chiakien
dc.contributor.authorGriffey, Carl A.en
dc.contributor.authorThomason, Wade E.en
dc.contributor.authorFukao, Takeshien
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.date.accessioned2021-01-22T18:04:58Zen
dc.date.available2021-01-22T18:04:58Zen
dc.date.issued2021-01-17en
dc.date.updated2021-01-22T15:47:29Zen
dc.description.abstractA sufficient nitrogen (N) supply is pivotal for high grain yield and desired grain protein content in wheat (<i>Triticum aestivum</i> L.). Elucidation of physiological and molecular mechanisms underlying nitrogen use efficiency (NUE) will enhance our ability to develop new N-saving varieties in wheat. In this study, we analyzed two soft red winter wheat genotypes, VA08MAS-369 and VA07W-415, with contrasting NUE under limited N. Our previous study demonstrated that higher NUE in VA08MAS-369 resulted from accelerated senescence and N remobilization in flag leaves at low N. The present study revealed that VA08MAS-369 also exhibited higher nitrogen uptake efficiency (NUpE) than VA07W-415 under limited N. VA08MAS-369 consistently maintained root growth parameters such as maximum root depth, total root diameter, total root surface area, and total root volume under N limitation, relative to VA07W-415. Our time-course N content analysis indicated that VA08MAS-369 absorbed N more abundantly than VA07W-415 after the anthesis stage at low N. More efficient N uptake in VA08MAS-369 was associated with the increased expression of genes encoding a two-component high-affinity nitrate transport system, including four <i>NRT2</i>s and three <i>NAR2</i>s, in roots at low N. Altogether, these results demonstrate that VA08MAS-369 can absorb N efficiently even under limited N due to maintained root development and increased function of N uptake. The ability of VA08MAS-369 in N remobilization and uptake suggests that this genotype could be a valuable genetic material for the improvement of NUE in soft red winter wheat.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLamichhane, S.; Murata, C.; Griffey, C.A.; Thomason, W.E.; Fukao, T. Physiological and Molecular Traits Associated with Nitrogen Uptake under Limited Nitrogen in Soft Red Winter Wheat. Plants 2021, 10, 165.en
dc.identifier.doihttps://doi.org/10.3390/plants10010165en
dc.identifier.urihttp://hdl.handle.net/10919/102015en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectTriticum aestivumen
dc.subjectnitrogen uptakeen
dc.subjectnitrogen transportersen
dc.subjectnitrogen use efficiencyen
dc.titlePhysiological and Molecular Traits Associated with Nitrogen Uptake under Limited Nitrogen in Soft Red Winter Wheaten
dc.title.serialPlantsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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