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4 Annales Universitatis Paedagogicae Cracoviensis Studia Naturae

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The succession of abandoned glades and its impact on the diversity of flora in Beskid Mały Mountains (Southern Poland)

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Kubik J. P. , Barabasz-Krasny B.

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae

2017

The influence of grazing, mowing, and other usable treatments on the flora diversity of glades in the Beskid Mały in southern Poland was investigated. The field research was carried out between 2015 and 2016. Flora analysis consisted mainly of comparing the botanical composition of glades abandoned for several decades with the botanical composition of glades currently used as pastures. On selected plots, botanical composition was determined using the Klapp (1965) estimation method. All floristic lists from the study plots were analysed by using hierarchical numerical classification. Based on the numerical classification of plots on analysed glades in the Beskid Mały, four utility-floristic groups were distinguished: pasture with Nardus stricta, hay-meadow, unused plots with Pteridium aquilinum, and unused plots with shrubs. The results of studies confirm the thesis that species composition is a reflection of management practices or lack thereof. It was demonstrated that the cessation of the grazing and mowing on the mountain glades of Beskidy caused adverse changes in the structure of species composition and a reduction in floristic diversity. Initially, it causes an increase in the number of species in the sward, followed by elimination of the photophilous species, which lowers general species richness.

Researchers’ Night of Małopolska at the Institute of Biology of the PU in Kraków September 30, 2016

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Możdżeń K. , Barabasz-Krasny B.

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae

2016

The role of magnesium salts in germination and growth of Cucumis sativus L.

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Zandi P. , Możdżeń K. , Barabasz-Krasny B. , Wang Y.

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae

2019

119-131

The aim of the study was to determine the eect of magnesium sulphate and carbonate on the germination and growth of cucumber seeds (Cucumis sativus L.). For the experiment was used (1) Kottke et al. (1987) medium (pH 5.4) and its modification: (2) Kottke medium with the addition of MgSO4×7H2O (pH 4.8), (3) Kottke medium with the addition of MgCO3×3H2O (pH 6.5) and (4) distilled water (control). Characterisation of the germination capacity of cucumber seeds, under the influence of Kottke medium and its modification, were measured by germination indexes. An attempt was also made to assess the eect of mediums on growth on the length of plants, fresh and dry mass and water content. Germination indexes showed that the presence of magnesium carbonates and sulphates slightly inhibited seed germination, compared to the control. Biometric analysis of C. sativus roots showed a stimulating effect of mediums regardless of the time of watering the plants. Compared to the control, the length of hypocotyl was inhibited in the presence of the magnesium and sulphates ions. Thee highest growth of cucumber stalks in plants watered with mediums supplemented with magnesium salts for all time of experiment was observed. The petiole growth in length was stimulated by all modifications of Kottke medium. Fresh mass values, regardless of the type of medium and the time of its use, were higher in relation to the mass values from the control sample. Only the fresh mass of hypocotyl from plants watered throughout the experiment with magnesium salts was lower compared to the control. For all tested C. sativus organs an increase in the dry mass value was demonstrated. The percentage of water content was the lowest for roots and first leaves compared to the control.

Allelopathic effects of Stellaria media (L.) Vill. on germination and early stages of growth of Raphanus sativus var. radicula

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Zandi P. , Barabasz-Krasny B. , Stachurska-Swakoń A. , Puła J. , Możdżeń K.

Annales Universitatis Paedagogicae Cracoviensis Studia Naturae

2018

Influence of aqueous extracts of aboveground organs of common crop weeds Stellaria media on germination and seedlings growth of radish (Raphanus sativus L. var. radicula Pers.) was studied. Three different cultivars of radish (i.e. ‘Rowa’, ‘Krakowianka’, and ‘Półdługa’) were used to investigate if Stellaria media could produce allelopathins and if the impact of allelopathins differs between cultivars. The influence of allelopathins in various form of extracts was checked, i.e. decoction, infusion, and macerate, as the impact on germination rate, seedling growth (length and mass), and electrolyte leakage. Compared to the control group (distilled water used) the germination rate of radish seeds was lower, independently of the type of S. media extracts used. The growth of seedlings differed between cultivars and form of extract. It was noticed the inhibition of seedling growth for ‘Półdługa’ cultivar independently of extract form. The growth of two other cultivars was stimulated by the infusion, and slightly inhibited by the decoction and macerate. The extracts reduced the outflow of electrolytes through the cell membranes of radish seedlings of all but one the analysed radish cultivars. The exception was the macerate, which in the ‘Rowa’ cultivar caused the increase of the electrolyte leakage.