abstract the goal of this experiment was to save apricot flowers from late spring frost damage. this experiment was conducted during 2007-2008 to examine the effect of application of different concentrations of gibberellic acid in two forms pure (ga3) and impure (berelex) at (0, 50, 100, 200, 300 mgl-1) at 23 august and 23 september to delay flowering in apricot asgarabad cultivar. a factorial ...

The major plant growth regulator ethephon degrades to ethylene and phosphate in aqueous solutions and plants and is spontaneously activated to a butyrylcholinesterase (BChE) inhibitor in alkaline solutions and animal tissues. In the present (31)P NMR kinetic study of the reactions of ethephon in pH 7.4 carbonate buffer, we observed a transient peak at 28.11 ppm. The time course for the appearan...

This study was conducted to evaluate the effects of exogenous polyamines, isopropyl ester, 2, 4-D and naphthalene acetamide application on yield and quality of date palm of ‘Kabkab’ cultivar. The inflorescences sprayed with 2, 4-D isopropylester (0, 10, and 20 mg L-1), naphthalene acetamide (0, 80, and 120 mg L-1), putrescence and spermidine (0, 0.1, and 1.0 mM), three or six weeks after pollin...

Communication between distant organs is an essential feature of multicellular organisms. Plants are no exception to this rule and long-range signals are involved in the regulation of many aspects of organ growth and development. In this review, we use two specific examples to illustrate this point. The first is a novel upwardly mobile hormone involved in the regulation of shoot branching. The s...

Salinity of soil is a major abiotic stress limiting the crop production and growth of peppermint. The aim of study was assessment the plant growth regulators efficacy (salicylic acid (SA), jasmonic acid (JA), brassinosteroids (BRs), and non-application of hormone as control) on physiological traits of peppermint under salinity stress (0, 30, and 60 mM). The experiment was conducted using the co...

sugar type and growth regulators are essential fundamental components of tissue culture media. in this study, different concentrations of some carbohydrate and growth regulators during anther culture and producing somatic embryo of datura stramonium l. was investigated in ms medium. the ms medium supplemented with 0.5 mgl-1 kinetin and 2 mgl-1 2,4-d, and also the medium supplemented with 0.25 m...

In order to evaluate the effect of plant growth regulators on sex determination and yield, an experiment was conducted by spraying different hormonal combinations on medicinal pumpkin. Experimental treatments were included different concentrations of NAA (25, 75, 100, 125 mg/l), paclobutrazol (50, 100, 200 and 300 mg/l) and combination of growth regulators (NAA 25 mg/l + PBZ 50 mg/l), (NAA 75 m...