Abstract:Potato buds cvs. ҅ Valor' and 'Spunta' were cultured in vitro on MS solid medium with 0.2 mg -1 BAP. The resulting plantlets were irradiated with gamma radiation doses 10, 20, 30, 40 and 50 Gy. Irradiated segments were transferred onto fresh MS with BAP and plantlets survival percentage was calculated after eight weeks. Gamma radiation caused the death of 3.8% to 81% in cv. ҅ Spunta' and 2.9% to 83.9% in cv. ҅ Valor'. Microtubers produced from irradiated plantlets were decreased with increasing gamma radiation… Show more
“…Moreover, it may cause harmful effects on the morphology, physiology, biochemistry, and anatomy in plants. Furthermore, these effects induce changes in plant cellular structure (Kovacs andKeresztes, 2002 andEl-Fiki et al, 2018). The leaf is the most adaptable organ in its response to abiotic stress (Marchi et al, 2008).…”
aulownia (Paulownia tomentosa L) is the one useful trees in China. All parts of paulownia tree (leaves, flowers, wood, bark, roots and seeds) have been used for many medicinal and industrial purposes. Buds were cultured on ¾ Murashige and Skoog (MS) solid medium supplemented with 0.2 mg/l benzyl adenine and 0.1 mg/l kinetin. The survival percentage and mean shoot length of irradiated plantlets with gamma radiation doses of 10, 20, 30, 40 and 50 Gy were calculated after eight weeks. The results showed a decrease in the survival percentage and mean shoot length by increasing gamma radiation doses. The lethal dose was 50 Gy and the optimal dose for explant survival was 10 Gy. Anatomical and ultrastructure of un-irradiated and irradiated paulownia were examined based on photonic and electron microscopy for plantlets leaves after 16 days from culturing. Anatomical studied of leaf surface showed variations in epidermal cells, trichomes, stomata and mesophyll cells. The ultrastructure sections showed formation of plastoglobule and starch granules which indicates a reduced carbon metabolism at sublethal dose of 40 Gy.
“…Moreover, it may cause harmful effects on the morphology, physiology, biochemistry, and anatomy in plants. Furthermore, these effects induce changes in plant cellular structure (Kovacs andKeresztes, 2002 andEl-Fiki et al, 2018). The leaf is the most adaptable organ in its response to abiotic stress (Marchi et al, 2008).…”
aulownia (Paulownia tomentosa L) is the one useful trees in China. All parts of paulownia tree (leaves, flowers, wood, bark, roots and seeds) have been used for many medicinal and industrial purposes. Buds were cultured on ¾ Murashige and Skoog (MS) solid medium supplemented with 0.2 mg/l benzyl adenine and 0.1 mg/l kinetin. The survival percentage and mean shoot length of irradiated plantlets with gamma radiation doses of 10, 20, 30, 40 and 50 Gy were calculated after eight weeks. The results showed a decrease in the survival percentage and mean shoot length by increasing gamma radiation doses. The lethal dose was 50 Gy and the optimal dose for explant survival was 10 Gy. Anatomical and ultrastructure of un-irradiated and irradiated paulownia were examined based on photonic and electron microscopy for plantlets leaves after 16 days from culturing. Anatomical studied of leaf surface showed variations in epidermal cells, trichomes, stomata and mesophyll cells. The ultrastructure sections showed formation of plastoglobule and starch granules which indicates a reduced carbon metabolism at sublethal dose of 40 Gy.
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