Cotyledon Expansion as a Bioassay for Cytokinins
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چکیده
منابع مشابه
The use of dimethylsulfoxide as a solvent in the tobacco bioassay for cytokinins.
The use of dimethylsulfoxide as a solvent for synthetic purine and urea derivatives in the tobacco callus bioassay for cytokinin activity (10) has simplified the test procedure at two stages. First, the high solubility of these compounds in DMSO' has made it possible to test the less active materials, or those which are only slightly water-soluble, through a wide range of concentrations; second...
متن کاملAn improved bioassay for cytokinins using cucumber cotyledons.
The cucumber cotyledon greening bioassay is frequently used for detecting cytokinins. Beneficial modifications of the original technique included using 5-day-old cucumber (Cucumus sativus L., cv. National Pickling) cotyledons treated with combinations of 40 millimolar KCl and various concentrations of cytokinins. A dark incubation period of 20 hours was followed by an exposure to light for 3.5 ...
متن کاملDELLA-Mediated Cotyledon Expansion Breaks Coat-Imposed Seed Dormancy
Seed dormancy is a key adaptive trait in plants responsible for the soil seed bank. The long established hormone-balance theory describes the antagonistic roles of the dormancy promoting plant hormone abscisic acid (ABA), and the germination promoting hormone gibberellin (GA) in dormancy control. Light, temperature, and other dormancy-breaking signals function to modulate the synthesis and perc...
متن کاملUpdate on Cytokinins Cytokinins. New Insights into a Classic Phytohormone
Cytokinins were discovered in the search for factors that promoted division of plant cells in culture. Naturally occurring cytokinins are N-substituted adenine derivatives that generally contain an isoprenoid derivative side chain. These hormones influence numerous aspects of plant development and physiology, including seed germination, de-etiolation, chloroplast differentiation, apical dominan...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1969
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.44.4.618