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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
Effect of panicle removal on cytokinin level in the xylem and nitrogen uptake activity of rice
| Title: | Effect of panicle removal on cytokinin level in the xylem and nitrogen uptake activity of rice |
| Authors: | SHINANO, Takuro Browse this author | | OSAWA, Motonari Browse this author | | SOEJIMA, Hiroshi Browse this author | | OSAKI, MITSURU Browse this author →KAKEN DB |
| Keywords: | cytokinin | | nitrogen | | panicle removal | | rice | | source–sink relationship |
| Issue Date: | Jun-2006 |
| Publisher: | Blackwell |
| Journal Title: | Soil Science and Plant Nutrition |
| Volume: | 52 |
| Issue: | 3 |
| Start Page: | 331 |
| End Page: | 340 |
| Publisher DOI: | 10.1111/j.1747-0765.2006.00042.x |
| Abstract: | To evaluate the role of cytokinin in the source–sink relationship, panicles of rice were cut from the stem at the panicle emergence stage. Xylem sap exudates were collected using the stem cut method and the cytokinin concentration in the collected sap was determined by bioassay and further analysis using enzyme-linked immunosorbent assay. The rate of cytokinin translocation from roots to shoots decreased continuously after panicle initiation, whereas, when the panicle was removed, the rate increased by up to 1.5-fold, at which time no cytokinin was found in the plants with panicles. Retardation of leaf senescence was not observed and nitrogen concentration in the leaves continued to decrease after panicle removal, irrespective of cytokinin (mainly dihydrozeatin riboside and trans-zeatin riboside) level. Thus, leaf autonomy is regulated by an endogenous program of nitrogen translocation from the leaf regardless of cytokinin level in the xylem. |
| Rights: | The definitive version is available at www.blackwell-synergy.com. |
| Relation: | http://www.blackwell-synergy.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/24327 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 信濃 卓郎
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