柳树韧皮部和木质部之间（14）C-激动素和（14）C-赤霉素的交换。

The interchange of (14)C-kinetin and (14)C-gibberellic acid between the bark and xylem of willow.

机构信息

Department of Botany, University College of Wales, Aberystwyth.

出版信息

Planta. 1969 Jun;89(2):108-25. doi: 10.1007/BF00386979.

Abstract

Considerable two-way interchange of label derived from (14)C-GA3 and (14)C-kinetin has been shown to occur between the xylem and extra-cambial tissue of Salix viminalis L. Radial translocation of both growth substances from the transpiration stream to the sieve-tube sap has been demonstrated by the use of an aphid technique. This is the first record of the bark-xylem interchange of these two growth hormones.A high percentage of (14)C-label is present in compounds other than GA3 and kinetin 8 hours after application.Mechanisms of lateral transfer are discussed together with their possible physiological significance.

摘要

已经证明，柳枝稷（Salix viminalis L.）木质部和韧皮外侧组织之间存在大量的（14）C-GA3 和（14）C-激动素的双向交换。通过使用蚜虫技术，已经证明这两种生长物质从蒸腾流径向转移到筛管汁液中。这是这两种生长激素在树皮-木质部之间交换的第一个记录。施药 8 小时后，除 GA3 和激动素之外的化合物中存在高比例的（14）C 标记。本文还讨论了侧向转移的机制及其可能的生理意义。