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CYTOKININS IN XANTHIUM STRUMARIUM L.: THE METABOLISM OF CYTOKININS IN DETACHED LEAVES AND BUDS IN RELATION TO PHOTOPERIOD
Author(s) -
HENSON I. E.,
WAREING P. F.
Publication year - 1977
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1977.tb01539.x
Subject(s) - zeatin , photoperiodism , biology , cytokinin , callus , botany , metabolism , metabolite , biochemistry , auxin , gene
SUMMARY Endogenous cytokinin activity in leaves and buds of Xanthium strumarium L. (as estimated by the soybean callus bioassay) declined by about 80% during the 24 h following detachment from the plant. The decline in activity was little influenced by the photoperiod to which the detached organs were exposed. When zeatin was supplied to detached leaves it underwent rapid metabolism. The main cytokinin‐active metabolite, which was readily detectable an hour after the start of zeatin uptake, eluted from a Sephadex LH20 column with the same elution volume as zeatin riboside. Substantial differences due to photoperiod, in either the rate or the pattern of zeatin metabolism, were not detected.