CHANGES IN THE LEVELS OF FREE IAA AND CYTOKININS IN POTATO-TUBERS DURING DORMANCY AND SPROUTING

被引：29

作者：

SUKHOVA, LS

MACHACKOVA, I

EDER, J

BIBIK, ND

KORABLEVA, NP

机构：

[1] Institute of Biochemistry, Russian Academy of Sciences, Moskva

[2] Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Praha 6, 166 00

来源：

BIOLOGIA PLANTARUM | 1993年 / 35卷 / 03期

关键词：

D O I：

10.1007/BF02928514

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Changes in the levels of free indol-3-ylacetic acid (IAA) and free cytokinins were determined in the course of dormancy and sprouting period in potato tubers (Solanum tuberosum L., cv. Nevskii) stored at 4-degrees-C. The same analyses were performed in potato tubers after Ethrel application, which prolongs dormancy. No significant changes were found in free IAA level during dormancy followed by a rapid decrease during sprouting. After Ethrel application a significant lower IAA level was found 3 weeks after application, but further on no changes in free IAA level between treated and non-treated tubers were detected. Cytokinin level was relatively low and constant till sprouting and increases then by about 55 %, mainly due to an increase in the level of zeatin riboside and isopentenyladenosine. Ethrel application decreased cytokinin level during dormancy slightly, but postpones the increase coupled with sprouting by about 1 month. Thus, IAA does not seem to have a significant effect on tuber dormancy, while cytokinins are probably necessary for sprouting initiation.

引用

页码：387 / 391

页数：5

共 19 条

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