Внесок фізіологів рослин Новоросійського університету в розвиток гормональної теорії тропізмів на початку XX ст.

Проаналізовано результати досліджень науковців Новоросійського університету на початку ХХ ст. (Л.С. Ценковський, Л.А. Рішаві, М.Д. Вахтель, В.А. Ротерт, О.Г. Набоких, Б.Б. Гриневецький, Ф.М. Породко, Г.А. Боровіков), показано їх внесок у розвиток фітогормонології як науки.Проанализированы результаты исследований ученых Новороссийского университета в начале ХХ в. (Л.С. Ценковский, Л.А. Ришави, М.Д. Вахтель, В.А. Ротерт, А.И. Набоких, Б.Б. Гриневецкий, Ф.М. Породко, Г.А. Боровиков), показано их вклад в развитие фитогормонологии как науки.The research results of the Novorossiysk University scientists (L.S. Tsenkovskiy, L.A. Rishavi, M.D. Vakhtel, V.A. Rotert, A.I. Nabokikh, B.B. Hrynevetskiy, Ph.M. Porodko, G.A. Borovikov) of the early XX c. is analysed, their contribution to the phytohormonology development as a science is shown

Down-regulation of the myo-inositol oxygenase gene family has no effect on cell wall composition in Arabidopsis

The enzyme myo-inositol oxygenase (MIOX; E.C. 1.13.99.1) catalyzes the ring-opening four-electron oxidation of myo-inositol into glucuronic acid, which is subsequently activated to UDP-glucuronic acid (UDP-GlcA) and serves as a precursor for plant cell wall polysaccharides. Starting from single T-DNA insertion lines in different MIOX-genes a quadruple knockdown (miox1/2/4/5-mutant) was obtained by crossing, which exhibits greater than 90% down-regulation of all four functional MIOX genes. Miox1/2/4/5-mutant shows no visible phenotype and produces viable pollen. The alternative pathway to UDP-glucuronic acid via UDP-glucose is upregulated in the miox1/2/4/5-mutant as a compensatory mechanism. Miox1/2/4/5-mutant is impaired in the utilization of myo-inositol for seedling growth. The incorporation of myo-inositol derived sugars into cell walls is strongly (>90%) inhibited. Instead, myo-inositol and metabolites produced from myo-inositol such as galactinol accumulate in the miox1/2/4/5-mutant. The increase in galactinol and raffinose family oligosaccharides does not enhance stress tolerance. The ascorbic acid levels are the same in mutant and wild type plants

Surface functionalization of bioactive glasses and hydroxyapatite with polyphenols from organic red grape pomace

An extract of polyphenols was obtained from organic red grape pomace, chemically analyzed, and used for functionalization of two bioactive glasses and porous hy- droxyapatite. Functionalization is effective on hydroxyapatite and the bioactive glass with higher surface reactivity with a different grafting mechanism. Grafting does not inhibit redox and radical scavenging activity of polyphenols. The grafted polyphenols make a continuous layer with an almost complete surface coverage. Polyphenols are released with different kinetics according to the mechanism of grafting and maintain their redox activity. A homogeneous thin layer of polyphenols is still firmly grafted on both substrates after 28 days of soaking and it still maintains radical scavenging activity. The functionalized samples can be sterilized by gamma irradiation