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The effect of abscisic acid on cell growth, cell division and DNA synthesis in the maize root meristem
Author(s) -
Barlow Peter W.,
Pilet PaulEmile
Publication year - 1984
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1984.tb00359.x
Subject(s) - abscisic acid , meristem , cell division , mitosis , dna synthesis , biology , cell growth , microbiology and biotechnology , cell cycle , endogeny , division (mathematics) , zea mays , cell , botany , dna , shoot , biochemistry , agronomy , gene , arithmetic , mathematics
Cis ‐abscisic acid (ABA), when applied to maize ( Zea mays L. cv. LG 11) roots, decreases the rates of cell growth and cell division in the meristem. It also decreases the rate at which nuclei become labelled with [ 3 H]‐thymidine and enter mitosis. Removing the root cap accelerates the entry of nuclei into the DNA synthetic phase of the mitotic cycle and enhances the rate of cell proliferation in the quescent centre. ABA diminishes these effects, but does not suppress them. Thus, ABA cannot wholely substitute for the presence of a cap. One of the primary effects of applied ABA is to retard cell enlargement which may in turn affect the rate of cell division; natural endogenous ABA may act similarly. ABA might in this way assist in maintaining the quiescent centre in intact roots, but cannot be the sole agent involved.