Nitric oxide mediates gravitropic bending in soybean roots
文献类型：期刊论文
| 作者 | Hu, XY; Neill, SJ; Tang, ZC; Cai, WM |
| 刊名 | Plant physiology
 |
| 出版日期 | 2005-02-01 |
| 卷号 | 137期号:2页码:663-670 |
| ISSN号 | 0032-0889 |
| DOI | 10.1104/pp.104.054494 |
| 通讯作者 | Cai, wm() |
| 英文摘要 | Plant roots are gravitropic, detecting and responding to changes in orientation via differential growth that results in bending and reestablishment of downward growth. recent data support the basics of the cholodny-went hypothesis, indicating that differential growth is due to redistribution of auxin to the lower sides of gravistimulated. roots, but little is known regarding the molecular details of such effects. here, we investigate auxin and gravity signal transduction by demonstrating that the endogenous signaling molecules nitric oxide (no) and cgmp mediate responses to gravistimulation in primary roots of soybean (glycine max). horizontal orientation of soybean roots caused the accumulation of both no and cgmp in the primary root tip. fluorescence confocal microcopy revealed that the accumulation of no was asymmetric, with no concentrating in the lower side of the root. removal of no with an no scavenger or inhibition of no synthesis via no synthase inhibitors or an inhibitor of nitrate reductase reduced both no accumulation and gravitropic bending, indicating that no synthesis was required for the gravitropic responses and that both no synthase and nitrate reductase may contribute to the synthesis of the no required. auxin induced no accumulation in root protoplasts and asymmetric no accumulation in root tips. gravistimulation, no, and auxin also induced the accumulation of cgmp, a response inhibited by removal of no or by inhibitors of guanylyl cyclase, compounds that also reduced gravitropic bending. asymmetric no accumulation and gravitropic bending were both inhibited by an auxin transport inhibitor, and the inhibition of bending was overcome by treatment with no or 8-bromo-cgmp, a cell-permeable analog of cgmp. these data indicate that auxin-induced no and cgmp mediate gravitropic curvature in soybean roots. |
| WOS关键词 | CYCLIC-GMP ; ARABIDOPSIS ROOT ; AUXIN ; INDUCTION ; CULTURES ; SIGNAL ; PLANTS ; CELLS |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000227116900022 |
| 出版者 | AMER SOC PLANT BIOLOGISTS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377644 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Cai, WM |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol, Grad Sch, Shanghai 200032, Peoples R China 2.Univ W England, Ctr Res Plant Sci, Bristol BS16 1QY, Avon, England |
| 推荐引用方式 GB/T 7714 | Hu, XY,Neill, SJ,Tang, ZC,et al. Nitric oxide mediates gravitropic bending in soybean roots[J]. Plant physiology,2005,137(2):663-670. |
| APA | Hu, XY,Neill, SJ,Tang, ZC,&Cai, WM.(2005).Nitric oxide mediates gravitropic bending in soybean roots.Plant physiology,137(2),663-670. |
| MLA | Hu, XY,et al."Nitric oxide mediates gravitropic bending in soybean roots".Plant physiology 137.2(2005):663-670. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。