Open AccessEffects of gibberellic acid and AMO-1618 on the development of vegetative systems in generatively matured thalli of Chara vulgaris L.
Author(s) -
Maria Kwiatkowska,
Mirosław Godlewski
Publication year - 2014
Publication title -
acta societatis botanicorum poloniae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 29
eISSN - 2083-9480
pISSN - 0001-6977
DOI - 10.5586/asbp.1980.040
Subject(s) - elongation , thallus , gibberellic acid , chemistry , biology , botany , germination , materials science , ultimate tensile strength , metallurgy
Effects of GA3 (10-11-10-4 M) and AMO-1618 (10-6-10-4 M) on the development of generatively matured thalli of Chara vulgaris were investigated during 21-day culture of plants in axenic conditions. It has been found that in the main bud the divisions of apical cells of the thalli are not stimulated by GA3, whereas in the lateral buds the cell divisions are stimulated by higher GA3 concentrations. Subsequent mitotic activity of the apical cells in the branches of the main axis is not stimulated by GA3, whereas the lateral buds of these branches are activated. The development of rhizoids in younger nodes is accelerated by high GA3 concentrations. The elongation of the polynuclear, internodal cells of the main axis and that of pleuridia are inhibited proportionally to the GA3 concentration. AMO-1618 stimulates the development of new nodes, elongation of internodes and delays the activation of lateral buds as well as the formation of rhizoids. These results suggest that the GA3-induced inhibition of elongation of the thalli and diminution of the apical domination is connected with a high level of endogenous gibberellins in the generatively matured thallus