The effect of exogenous growth regulators on movement of assimilates into flowers and young fruits of ;Black Corinth' grapes was studied. Clusters were treated with growth regulator and after 0.5 hr to 5 days the leaves above the clusters were exposed to (14)CO(2). Control shoots received (14)CO(2) but no growth regulator. At harvest, counting and radioautographic techniques were used to ascert...

Flower bud formation and flowering in chrysanthemums occur under short day conditions (SD), but the molecular basis for the switch to reproductive growth is less well understood than in model plants. Here, a spontaneous mutant able to flower under long days is described. In an attempt to reveal the pathway(s) involved in the formation of flower buds under contrasting daylengths, transcriptome s...

Flowering of the facultative long-day plant Arabidopsis is controlled by several endogenous and environmental factors, among them gibberellins (GAs) and day length. The promotion of flowering by long days involves an endogenous clock that interacts with light cues provided by the environment. Light, and specifically photoperiod, is also known to regulate the biosynthesis of GAs, but the effects...

Whereas gibberellin and ethylene may both hasten abscission development in explant tissues (6, 7), and may provoke simi,lar actions in releasing some dormant buds or seeds (11, 17) in several growth functions these 2 regulators may have opposing types of effects. For example, ethylene and gibberellin (GA) ihave opposite effects in senescence development (3, 13). The reports that gibberellin can...

this research evaluated the effects of gibberellin (ga3) and abscisic acid (aba) on emergence capability, rate of emergence, vigor index and some physiological characters of chickpea seedling (cicer arietinum l.) in a field experiment (as split) under dry and irrigated conditions. seeds were primed with 0, 50, 100 and 150 ppm of each phytohormones. examined chickpea cultivar was azad. the resul...