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An effective protocol for in vitro germination and seedling development of lentisk (Pistacia lentiscus L.)

100%

Yildirim H. , Calar N. , Onay A.

Acta Scientiarum Polonorum. Hortorum Cultus

2018

tom 17

nr 4

Different nutrient media (MS [Murashige and Skoog 1962]; QL [Quoirin and Lepoivre 1977] and WPM [Lloyd and McCown 1980]); plant growth regulators BA (benzil adenin), GA3 (gibberellic acid), IBA (indole-3-butyric-acid), NAA (naftalen acedic acid); and sucrose concentrations were studied to determine the in vitro culture effects on healthier and faster seedling development from mature lentisk (Pistacia lentiscus L.) seeds. After 28 days of culture, the percentage of germinated seeds was the highest (70%) in the full-strength MS medium. The cytokinin BA was superior to other tested treatments in terms of its ability to promote germination of lentisk seeds. When tested at different concentrations, sucrose gave the best results obtained at concentrations of 1–4%, whereas high concentrations (6 and 8%) mainly decreased germination rate and there was no a regular pattern for elongation of the aerial parts of plants. With this described protocol, on average 76.67% seeds germinated 4 weeks after culture. Developed seedlings were satisfactorily acclimatized in sterilized peat, soil and perlite containing compost, with high percentage survival viability was obtained 9 months after transfer to in vivo conditions (93.33%). The results obtained showed that the enriched full-strength MS medium supplemented with 1 mg L–1 BA and 3% sucrose induced homogeneous and healthy seedling development in a period of 4 to 8 weeks of culture.

Morphological and mechanical properties of hot gas welded PE, PP and PVC sheets

100%

Balkan O. , Demirer H. , Yildirim H.

Journal of Achievements in Materials and Manufacturing Engineering

2008

tom Vol. 31, nr 1

60-70

Purpose: The goal of the paper is to investigate morphological and mechanical properties of hot gas butt-welds on polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC) sheets for four different procedures, which are single and double V-welds with and without a welding shoe. Design/methodology/approach: Welding energy (Ew), which is transferred onto weld surfaces, was calculated to evaluate weld quality. Morphology of welds was analyzed by polarized light, stereo, and scanning electron microscopy. Findings: Polarized light microscopy studies indicated that the heat-affected zone (HAZ) consists of welding rod core, molten zone, and deformed spherulitic zone. The results of tensile, bending, and impact tests indicated that the weld strengths of PVC sheets are lower than those of PE and PP sheets. When the welding shoe was used, weld strength increased significantly for each material due to the presence of sufficient welding pressure and the effective heating on surfaces. Practical implications: The best results were attained for the double V-welds with the welding shoe. Originality/value: Morphological and mechanical properties of hot gas welded PE, PP and PVC sheet were evaluated.

Pomological and phytochemical evaluation of different cherry species: mahaleb (Prunus mahaleb L.), wild sweet cherry (Prunus avium L.) and wild sour cherry (Prunus cerasus L.), sweet and sourcherry cultivars

100%

Karaat F. E. , Gunduz K. , Saracoglu O. , Yildirim H.

2019

tom 18

nr 4

Cherries are known as health friendly fruits due to their abundant phytochemical compositions. This study was conducted to determine phytochemical and pomological fruit properties of different cherry species including mahaleb (Prunus mahaleb L.), wild sweet cherry (Prunus avium L.), wild sour cherry (Prunus cerasus L.), two sweet cherries (‘Napoleon’ and ‘Starks Gold’) and one sour cherry (‘Kütahya’) cultivars. For this aim, together with various pomological traits, total phenolics and anthocyanin contents, antioxidant capacity, organic acids, sugars, were analyzed in fruits of relevant genotypes. Results of all examined traits significantly varied between genotypes. Mahaleb showed the highest TSS (30.17%), fructose (8.71 μg/g) and glucose (20.74 μg/g) contents. Wild sour cherry gave the highest antioxidant capacity (13.25 mmol TE/ kg total weight), anthocyanin (351.0 mg Pg-3-glk/kg total weight), citric acid (0.56 μg/g) and malic acid (2.96 μg/g) contents. As a rootstock, mahaleb was found to be superior in some of the traits when compared to wild sweet cherry. Significant correlations were observed between various traits. Additionally, principal component analysis (PCA) revealed different relationships among the traits and evaluated genotypes.