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SELECTIVE INHIBITION OF CELL CYCLE STAGES IN THE ALLIUM ROOT MERISTEM BY COLCHICINE AND GROWTH REGULATORS
Author(s) -
Nagl W.
Publication year - 1972
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1972.tb10103.x
Subject(s) - biology , kinetin , meristem , colchicine , abscisic acid , mitosis , allium sativum , allium , cytokinesis , polyploid , botany , cell cycle , metaphase , microbiology and biotechnology , mitotic index , proline , cell division , biochemistry , cell , tissue culture , shoot , ploidy , genetics , amino acid , chromosome , gene , in vitro
The treatment of root tips of Allium carinatum, Allium cepa , and Allium flavum with colchicine, abscisic acid, kinetin, and indole‐3‐acetic acid, applied in appropriate concentrations, combinations, and durations, makes possible the selective blockade of the cell cycle in G 1 , G 2 , any mitotic stage, and between karyokinesis and cytokinesis. Moreover, treatment with abscisic acid followed by a recovery period stimulates polyploid nuclei in mature tissues to divide. Colchicine, kinetin, and indole‐3‐acetic acid applied together cause end‐to‐end association of metaphase chromosomes. These results together with earlier findings suggest that any step of the cell cycle is independently controlled both by specific balance of the growth regulators and by specific synthesis of the nucleic acids.