Study of the effect of gibberellins on some physiologic processes of corn plants (Zea mays).

The current trend on the environment protection is to use some techniques of obtaining some efficient cultures using fertilizers in agriculture. Taking into account of these aspects, we considered necessary addressing some research on the influence of growing hormones on the growing processes of plants. The aim of this research was obtaining some results meant to lead to the increase of the mineral nutrition conditions of plants. Gibberellins are natural stimulants of plants growth and development, with often spectacular effects, which due to the remarkable results found in the agricultural and horticultural production enjoy a special attention of the specialists. The aim of this study was to follow the effect of gibberellic acid of different concentrations on the germination, the dynamics of the growth of roots, stems, the intensity of perspiration and respiration of corn seedlings. The used variants were: V 1 - control sample, V 2 - 0.1mg/l, V 3 - 1mg/l, V 4 - 2mg/l,  V 5 - 5mg/l of giberellic acid. Subsequent to the analysis of the data obtained from the performed experience, one can state that the germination is positively influenced; the growth rate of stems has higher values as in case of roots. The stems are higher and thinner, the leaves become light green, the main root and the side ones are thin and long. Also, the intensity of perspiration uniformly increases from the control sample to the V 5 variant (5 mg/l gibberellic acid), being correlated with the increased phytohormone concentration.