| Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence in Arabidopsis | |
| Li, Baohai1,2; Li, Qing1,2; Su, Yanhua1; Chen, Hao3; Xiong, Liming3,4; Mi, Guohua5; Kronzucker, Herbert J.6; Shi, Weiming1 | |
| 刊名 | PLANT CELL AND ENVIRONMENT
 |
| 2011-06-01 | |
| 卷号 | 34期号:6页码:933-946 |
| 关键词 | ABA ammonium toxicity auxin transport root shoot-derived signal |
| ISSN号 | 0140-7791 |
| DOI | 10.1111/j.1365-3040.2011.02295.x |
| 通讯作者 | Shi, Weiming(wmshi@issas.ac.cn) |
| 英文摘要 | Deposition of ammonium (NH(4)+) from the atmosphere is a substantial environmental problem. While toxicity resulting from root exposure to NH(4)+ is well studied, little is known about how shoot-supplied ammonium (SSA) affects root growth. In this study, we show that SSA significantly affects lateral root (LR) development. We show that SSA inhibits lateral root primordium (LRP) emergence, but not LRP initiation, resulting in significantly impaired LR number. We show that the inhibition is independent of abscisic acid (ABA) signalling and sucrose uptake in shoots but relates to the auxin response in roots. Expression analyses of an auxin-responsive reporter, DR5:GUS, and direct assays of auxin transport demonstrated that SSA inhibits root acropetal (rootward) auxin transport while not affecting basipetal (shootward) transport or auxin sensitivity of root cells. Mutant analyses indicated that the auxin influx carrier AUX1, but not the auxin efflux carriers PIN-FORMED (PIN)1 or PIN2, is required for this inhibition of LRP emergence and the observed auxin response. We found that AUX1 expression was modulated by SSA in vascular tissues rather than LR cap cells in roots. Taken together, our results suggest that SSA inhibits LRP emergence in Arabidopsis by interfering with AUX1-dependent auxin transport from shoot to root. |
| 收录类别 | SCI |
| WOS关键词 | GDP-MANNOSE PYROPHOSPHORYLASE ; ABSCISIC-ACID ; SYSTEM ARCHITECTURE ; ATMOSPHERIC AMMONIA ; NITROGEN DEPOSITION ; GROWTH INHIBITION ; GENETIC-ANALYSIS ; PERMEASE AUX1 ; HIGHER-PLANTS ; TRANSPORT |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| 出版者 | WILEY-BLACKWELL |
| WOS记录号 | WOS:000290450000005 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2558992 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Shi, Weiming |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100081, Peoples R China 3.Donald Danforth Plant Sci Ctr, St Louis, MO 63132 USA 4.King Abdullah Univ Sci & Technol, Plant Stress Genom Res Ctr, Thuwal 239556900, Saudi Arabia 5.China Agr Univ, Coll Resources & Environm Sci, Beijing 100094, Peoples R China 6.Univ Toronto, Dept Biol Sci, Scarborough, ON M1C 1A4, Canada |
| 推荐引用方式 GB/T 7714 | Li, Baohai,Li, Qing,Su, Yanhua,et al. Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence in Arabidopsis[J]. PLANT CELL AND ENVIRONMENT,2011,34(6):933-946. |
| APA | Li, Baohai.,Li, Qing.,Su, Yanhua.,Chen, Hao.,Xiong, Liming.,...&Shi, Weiming.(2011).Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence in Arabidopsis.PLANT CELL AND ENVIRONMENT,34(6),933-946. |
| MLA | Li, Baohai,et al."Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence in Arabidopsis".PLANT CELL AND ENVIRONMENT 34.6(2011):933-946. |
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