منابع مشابه
Update 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...
متن کاملCytokinins on the Move
Cytokinins are important signals that participate in different plant processes, and are well known for their strong influence in plant development. With the years, knowledge has been built about their effects, chemical nature, metabolism, and signaling mechanisms. However, one aspect about cytokinins that has been lagging behind is cytokinin transport. Recent reports are providing more informat...
متن کاملCytokinins induce sporulation in Dictyostelium.
The social amoeba Dictyostelium discoideum diverged from the line leading to animals shortly after the separation of plants and animals but it retained characteristics of both kingdoms. A GABA(B)-like receptor and a peptide, SDF-2, with homologs found only in animals, control sporulation, while cytokinins, which act as hormones in plants, keep spores dormant. When SDF-2 binds its receptor DhkA,...
متن کاملEndogenous cytokinins in maturing manzanillo olive fruits.
Cytokinin activity was found in mature black olive fruits while in green fruits the activity was markedly lower. The substances with cytokinin activity showed chromatographic properties similar to those of nucleotides. Acid hydrolysis caused a shift of the active zone in the organic phase of 1-butanol-acetic acid-water (4:1:5) from R(F) 0.1 to R(F) 0.8. The possible relation of these endogenous...
متن کاملRole of cytokinins in carnation flower senescence.
Stem and leaf tissues of carnation (Dianthus caryophyllus) plants appear to contain a natural antisenescence factor since removal of most of these tissues from cut carnation flowers hastened their senescence. However, kinetin (5-10 mug/ml) significantly delayed senescence of flowers with stem and leaf tissues removed. In addition, the life span of cut flowers with intact (30-cm) stems was incre...
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ژورنال
عنوان ژورنال: Karstenia
سال: 1978
ISSN: 0453-3402
DOI: 10.29203/ka.1978.169