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Overexpression of a NAC transcription factor delays leaf senescence and increases grain nitrogen concentration in wheat
文献类型：期刊论文
| 作者 | Zhao, D.1,2,3; Derkx, A. P.2; Liu, D. -C.1; Buchner, P.2; Hawkesford, M. J.2 |
| 刊名 | plant biology
 |
| 出版日期 | 2015-07-01 |
| 卷号 | 17期号:4页码:904-913 |
| 关键词 | Grain protein deviation NAC gene family nitrogen remobilisation rubisco Triticum aestivum yield |
| 中文摘要 | increasing the duration of leaf photosynthesis during grain filling using slow-senescing functional stay-green phenotypes is a possible route for increasing grain yields in wheat (triticum aestivum l.). however, delayed senescence may negatively affect nutrient remobilisation and hence reduce grain protein concentrations and grain quality. a novel nac1-type transcription factor (hereafter tanac-s) was identified in wheat, with gene expression located primarily in leaf/sheath tissues, which decreased during post-anthesis leaf senescence. expression of tanac-s in the second leaf correlated with delayed senescence in two doubled-haploid lines of an avalonxcadenza population (lines 112 and 181), which were distinct for leaf senescence. transgenic wheat plants overexpressing tanac-s resulted in delayed leaf senescence (stay-green phenotype). grain yield, aboveground biomass, harvest index and total grain n content were unaffected, but nac over-expressing lines had higher grain n concentrations at similar grain yields compared to non-transgenic controls. these results indicate that tanac-s is a negative regulator of leaf senescence, and that delayed leaf senescence may lead not only to increased grain yields but also to increased grain protein concentrations. |
| 英文摘要 | increasing the duration of leaf photosynthesis during grain filling using slow-senescing functional stay-green phenotypes is a possible route for increasing grain yields in wheat (triticum aestivum l.). however, delayed senescence may negatively affect nutrient remobilisation and hence reduce grain protein concentrations and grain quality. a novel nac1-type transcription factor (hereafter tanac-s) was identified in wheat, with gene expression located primarily in leaf/sheath tissues, which decreased during post-anthesis leaf senescence. expression of tanac-s in the second leaf correlated with delayed senescence in two doubled-haploid lines of an avalonxcadenza population (lines 112 and 181), which were distinct for leaf senescence. transgenic wheat plants overexpressing tanac-s resulted in delayed leaf senescence (stay-green phenotype). grain yield, aboveground biomass, harvest index and total grain n content were unaffected, but nac over-expressing lines had higher grain n concentrations at similar grain yields compared to non-transgenic controls. these results indicate that tanac-s is a negative regulator of leaf senescence, and that delayed leaf senescence may lead not only to increased grain yields but also to increased grain protein concentrations. |
| WOS标题词 | science & technology ; life sciences & biomedicine |
| 类目[WOS] | plant sciences |
| 研究领域[WOS] | plant sciences |
| 关键词[WOS] | triticum-aestivum l. ; stay-green phenotype ; winter-wheat ; factor family ; durum-wheat ; gene gpc-b1 ; arabidopsis ; identification ; remobilization ; protein |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000356881400014 |
| 源URL | [http://ir.nwipb.ac.cn/handle/363003/5541]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 作者单位 | 1.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining, Peoples R China 2.Rothamsted Res, Plant Biol & Crop Sci Dept, Harpenden AL5 2JQ, Herts, England 3.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, D.,Derkx, A. P.,Liu, D. -C.,et al. Overexpression of a NAC transcription factor delays leaf senescence and increases grain nitrogen concentration in wheat[J]. plant biology,2015,17(4):904-913. |
| APA | Zhao, D.,Derkx, A. P.,Liu, D. -C.,Buchner, P.,&Hawkesford, M. J..(2015).Overexpression of a NAC transcription factor delays leaf senescence and increases grain nitrogen concentration in wheat.plant biology,17(4),904-913. |
| MLA | Zhao, D.,et al."Overexpression of a NAC transcription factor delays leaf senescence and increases grain nitrogen concentration in wheat".plant biology 17.4(2015):904-913. |
入库方式： OAI收割
来源：西北高原生物研究所
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