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Open access

Danuta Kulpa and Natalia Nowak

In vitro flowering of Petunia × atkinsiana D. Don

The aim of this study was an attempt to determine the influence of PGRs - auxins, cytokinins and gibberellic acid - on the flowering and morphogenesis of ‘Flash Red’ Petunia × atkinsiana D. Don in vitro. The best results at the propagation stage were obtained on an MS medium supplemented with 0.5 mg dm-3 GA3. The petunia plants propagated under these conditions developed high main shoots and a large number of leaves and adventitious shoots. The plants with the best-developed root system were regenerated on an MS medium supplemented with 0.5 and 1.0 mg dm-3 IAA. Flowering initiation should be performed using an MS medium supplemented with 0.5 mg dm-3 KIN.

Open access

Jan Kalembkiewicz, Elżbieta Sitarz-Palczak, Eleonora Soćo, Danuta Nowak and Irena Trojnar


The atmospheric fallout over the Rzeszów town was investigated. Intensity of dustfall (quarterly periods, 2011.2012) and its physicochemical properties (acid-base character, solubility and sequential solubility, mobile fractions) were investigated. The intensity of dustfall was variable from 25 to 83 g·m.2 and depended on the season. Contents of metals in precipitation were diverse with quantities exceeding 1%: Fe, K, Ca, Na, in 0.1.1%: Mg, Zn, Na, Ca, Mn, Ni, Co, Cr, and less than 0.1%: Cu, Bi, Cr, Mn, Ni, Pb. It was found that the dustfall is a possible source of metals. The atmospheric fallout can enlarge a pool of metals in soils from 0.18% up to 80%.