MISC

2006年6月

Effect of panicle removal on cytokinin level in the xylem and nitrogen uptake activity of rice

SOIL SCIENCE AND PLANT NUTRITION
  • Takuro Shinano
  • ,
  • Motonari Osawa
  • ,
  • Hiroshi Soejima
  • ,
  • Mitsuru Osaki

52
3
開始ページ
331
終了ページ
340
記述言語
英語
掲載種別
DOI
10.1111/j.1747-0765.2006.00042.x
出版者・発行元
TAYLOR & FRANCIS LTD

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 particles. 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.

Web of Science ® 被引用回数 : 4

リンク情報
DOI
https://doi.org/10.1111/j.1747-0765.2006.00042.x
CiNii Articles
http://ci.nii.ac.jp/naid/110006251036
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000238881600010&DestApp=WOS_CPL