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Methyl jasmonate (JA-Me) at a concentration of 0.5 % induced the formation of secondary abscission zone and senescence in several types of stem explants (only internode segment, internode segment with nodes and without leaves, internode segment with nodes and debladed petioles) of Bryophyllum...
The response of wheat seedlings germinated under salinity stress to exogenous abscisic acid was discussed. Exogenous ABA acid induces two characteristic proteins of high molecular weights (109.4 and 84.0 kDa) in addition to the new protein set formed under high salinity levels. ABA, also induces...
Quercetin is a very common flavonoid widely distributed in many plants. The flavonoid intake has been linked to the prevention of human diseases including cancer. Flavonoids possess also a broad spectrum of effects on plants. Quercetin is involved in Ca 2+ transport and metabolism. The present...
The presented work was conducted on seedlings of spring barley and meadow fescue which differ in the degree of sensitivity to leaf spot pathogen Bipolaris sorokiniana (Sacc.) Shoem. The seedling reaction to inoculation with mycelium and conidia was examined in glasshouse conditions on the basis...
Extracellular ice formation in winter oilseed rape leaf discs ( Brassica napus L. var. oleifera L. cv. Jantar) at different temperatures resulted in a transient membrane depolarization, which was followed by a decrease in membrane electric potential. In discs which underwent supercooling (no...
Agrobacterium tumefaciens is a very useful vector to transfer foreign genes into dicotyledonous cells. Monocotyledonous, especially cereals, were considered outside the host range of the bacteria. The main, alternative technique of transformation developed for them was delivery of naked DNA (...
The mesophyll protoplasts were isolated from the Solanum tuberosum ( S. tbr ) clones of different ploidy level (4x Bzura cv. , 2x H-8105, and 2x ZEL-1136) as well as from the wild species: S. bulbocastanum ( S. blb , 2x) and two accessions of S. nigrum ( S. ngr , 6x). Additionally, the...
Seven-day-old seedlings of the cucumber ( Cucumis sativus L.) cv. Wisconsin were treated with 0.5 mM solutions of phenols (p-coumaric, ferulic, p-hydroxybenzoic and vanillic acids) as stress factors. The level of free polyamines as well as activities of their catabolic enzymes, i.e. di- and...
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