Cytokinin effect on branching and bud formation in Funaria
PlantaPublished 1 November 1986
Martin Bopp, H. Jacob
Citations27
SJR quartileQ1
SJR score0.99
SNIP0.98
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TL;DR
Two different effects on protonemata of Funaria hygrometrica are studied: branching of unbranched caulonemata and bud formation, which are independently stimulated by cytokinins.
Abstract
Cytokinins have two different effects on protonemata of Funaria hygrometrica. They induce branching of unbranched caulonemata and bud formation. Branching occurs after treatment with pico-molar concentrations of cytokinins whereas bud formation requires micro-molar concentrations. Both processes are therefore independently stimulated by cytokinins.
Keywords
MedicineAgricultural and Biological SciencesBiochemistry, Genetics and Molecular Biology
Developmental BiologyCalcium antagonists and calmodulin inhibitors block cytokinin-induced bud formation in Funaria
163 Citations1983Mary Jane Saunders, Peter K. Hepler
The hypothesis that a rise in intracellular calcium mediates cytokinin-induced bud formation in Funaria hygrometrica is supported and may be effected in part by the activation of calmodulin.
PlantaLocalization of membrane-associated calcium following cytokinin treatment in Funaria using chlorotetracycline
124 Citations1981Mary Jane Saunders, Peter K. Hepler
Investigation of changes in membrane-associated calcium that occur during cytokinin induced bud formation in Funaria hygrometrica Hedw concludes that the relative amount of Ca2+ per quantity of membrane increases in this localized area and is maintained throughout bud formation.
ScienceCalcium Ionophore A23187 Stimulates Cytokinin-Like Mitosis in <i>Funaria</i>
120 Citations1982Mary Jane Saunders, Peter K. Hepler
Findings suggest that increases in the concentration of intracellular calcium are essential to bud initiation and mitotic regulation by cytokinin may be due, at least in part, to the modulation of intrACEllular calcium ion concentration.
PlantaA cytokinin test with high specificity
88 Citations1968Heinz Hahn, Martin Bopp
A cytokinin bioassay based on bud formation in 10-cell-long caulonema filaments of Funaria hygrometrica is described, which has high specificity and sensitivity and exhibits linearity between cytokinIn concentration in the medium and bud number.
Hormonal Regulation of Plant Growth and Development
84 Citations1985S. S. Purohit
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PROTOPLASMASide branch formation and orientation in the caulonema of the moss,Funaria hygrometrica: Normal development and fine structure
80 Citations1979G. Schmiedel, E. Schnepf
The regular branching of theFunaria caulonema filaments is partly related to rhythms in nuclear and cell division and the distribution of microtubules and the polar organization of the cytoplasm was studied by light and electron microscopy.
PlantaCytokinin activation and redistribution of plasma-membrane ion channels in Funaria
62 Citations1986Mary Jane Saunders
Cytokinin-induced concentration of ion channels over presumptive bud sites may be envisioned to exert spatial control of cytoplasmic ion concentrations and stimulate bud formation by establishing a new growth zone, directing nuclear migration, and stimulating cell division.
PROTOPLASMASide branch formation and orientation in the caulonema of the moss,Funaria hygrometrica: Experiments with inhibitors and with centrifugation
61 Citations1979G. Schmiedel, E. Schnepf
The role and interrelationship of the nucleus and peripheral cytoplasm in establishing and maintaining the polar axes, and the role of microtubules are discussed.
Zeitschrift für PflanzenphysiologieThe Hormonal Regulation of Protonema Development in Mosses
39 Citations1984Martin Bopp
Bud formation, a fundamental step in the morphogenesis of the protonema of Funaria hygrometrica and other mosses, is regulated by external cytokinins like kinetin, zeatin etc.
Hormonal Regulation of Development in Mosses
14 Citations1987Martin Bopp, Satish C. Bhatla
In many mosses of the “Funaria type”, very young side branches of the first and second order can be transformed into buds in a third step, which constitute early stages of gametophore development, in which the differentiation steps follow each other in a clear sequence.