The germinatioil of seed can be controlled by ap)plication of exogenous hormones at physiological concenitrations. It is therefore possible that the n-atural control of germination involves an interplay of hormones, both promoters and inh,,ibitors. WXe have shown that cytokinins overcome the inhibitoryaction of several natural inhibitors in the germination of the photosensitive Grand Rapids let...

Six compounds (IBA, chlorogenic acid, cytokinine, GA3, alar B-9 and maleic hydrazide) belonging to four different categories of plant growth hormones were used to study their effect on carbohydrate content in L. erysimi. The second instar nymphs (48 hr old) were given both dipping and leaf surface treatment with 1024 ppm concentration of compounds for two time intervals i.e. 48 and 96 hr. The c...

Kinetin at physiological concentrations causes significant reduction of GA3-promoted growth in excised Avena stem segments. Kinetin is therefore considered to be a gibberellinantagonist in this system. A Eineweaver-Burke plot reveals that kinetin acts non-competitively with GAa. The kinetin inhibition of GA3-promoted growth can be seen within 6 hours. It was found that soluble protein is marked...

a study was conducted to determine the optimum concentration of benzyladenie (ba) and gibberllic acid (ga3) to break the dormancy of gladiolus corms in relation to storage period and to find out the effect of ba and ga3 on growth and development of gladiolus corm and cormels. the effect of ga3 on dormancy breaking was most pronounced in the 100 ppm treatment being 26.93 days while in the water ...

The effect of plant growth hormones (kinetin, gibberellic acid (GA3) and indole acetic acid (IAA)) on EMS-induced mutant wing spots was studied with the somatic mutation and recombination test (SMART) in Drosophila melanogaster. GA3 reduced all kinds of EMS-induced spot. While a 10 -3 M concentration of kinetin reduced only the number of EMS-induced twin spots, a 10-4 M concentration was seen t...

Seeds of Bauhinia acuminata L. were used as an experimental material for micropropagation. The effect of growth regulators concentrations on morphogenetic development was studied. Seeds were germinated on MS medium supplemented with GA3 (0.10, 1.0 and 2.0 mgL -1 ) and without GA3. Satisfactory germination was observed at media with 1.0 mgL -l GA3. Subsequent propagation from plantlet was perfor...

Many changes in development, growth, hormone activity and environmental stimuli responses are mediated by mitogen-activated protein kinase (MAPK) cascades. However, in plants, studies on MAPKs have mainly focused on MPK3, MPK4 and MPK6. Here, a novel group B MAPK gene, GhMPK11, was isolated from cotton (Gossypium hirsutum L.) and characterized. Both promoter and expression pattern analyses reve...

abstract an investigation was performed in a commercial orchard in shiraz to study the effect of time of application of cuso4 and streptomycin on quality and seedlessness of grapevine (vitis vinifera l. cv. ‘siyah-e-shiraz’). the experiment was conducted as completely randomized block design with 3 replications. plants were treated with 25 mgl-1 cuso4. 5h2o and 200mgl-1 streptomycin 2,4 and 6 d...

The aim of the study was to assess post-harvest life leaves Hemerocallis × hybrida ‘Agata’, Limonium latifolium, and Heuchera ‘Chocolate Ruffles’ after application growth regulators from group gibberellins (GAs) cytokinins (CKs), ionic liquids (2-hydroxyethyl)dimethylethylammonium gibberellinate [Chol][Gib] acetylcholine [Gib][Ach]), as well quaternary ammonium salts with anion (1-ethyl quinine...

To date, economically and energy-costly vegetative propagation using rhizomes tissue culture are the only options for cultivation of Miscanthus spp. Some genotypes miscanthus produce fertile seeds, offering a valid alternative to propagation. A preliminary study has been conducted on seeds two hybrids obtained via interspecific cross-pollination between M. sacchariflorus sinensis: ‘GRC14’ (mate...