Izvestiya of Saratov University.
Chemistry. Biology. Ecology
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

Биология

New floral finds in the Republic of Bashkortostan (based on the materials of 2025)

The article provides information on the fi ndings of 6 species (Agrimonia grandis (Asch. et Graebn.) Andrz. ex Dobrocz., Astragalus silvisteppaceus Knjaz., Astragalus tergeminus (Knjaz., Kulikov et E. G. Philippov) Knjaz., Erucastrum gallicum (Willd.) O. E.

Functional traits of the Saratov-bred purple-grain wheat line hei730/c68//Erythrospermum 223

In the context of the infl uence of negative environmental and social factors, prolonging human active life and curbing age-related changes have become an urgent task. One way to solve these problems is to eat foods rich in antioxidants, such as vitamin E, polyphenols, tannins, anthocyanins, carotenoids. Breeders work on expanding the resource potential of products with functional properties. One global trend is the development of wheat varieties rich in purple grain antioxidants.

Photodynamic treatment using led red (660 nm) and laser infrared (808 nm) radiation for the treatment of simulated abdominal abscesses in laboratory animals

 This study examined the eff ectiveness of antimicrobial photodynamic therapy (APDT) in the treatment of simulated purulent abdominal abscesses in laboratory animals. Two “radiation + photosensitizer” regimens were tested: 1) using red LED (660 nm) radiation and methylene blue, 2) using laser infrared (808 nm) radiation and indocyanine green.

The influence of growing conditions on the microbiota of eggplant (Solanum melongena L., 1753) plants in the Saratov Region

Soil and climatic conditions are factors influencing the composition and structure of microbial communities of various agrocenoses. Since microbiota plays a key role in the development of plant resistance to pathogens, studying its regional dynamics is of signifi cant scientific and practical interest. A comparative study of the microbiota of eggplant (Solanum melongena L., 1753) plants grown in diff erent soil and climatic conditions in the right- and left-bank areas of the Saratov Region was conducted. One hundred healthy leaf samples were microbiologically analyzed.

АНТАГОНИСТИЧЕСКАЯ АКТИВНОСТЬ БАКТЕРИЙ ПО ОТНОШЕНИЮ К МИКРОМИЦЕТАМ, ВЫДЕЛЕННЫМ ИЗ ЗЕРНОВОК ЯРОВОЙ МЯГКОЙ ПШЕНИЦЫ РАЗНЫХ СОРТОВ

Альтернариоз яровой мягкой пшеницы является одной из значимых фитопатологических проблем, приводящих к снижению посевных качеств зерна и потенциальному ухудшению урожайности. В связи с ограничениями применения химических фунгицидов и ростом интереса к экологически безопасным методам защиты растений актуальным направлением является поиск бактериальных антагонистов среди аборигенной микробиоты пшеницы.

Green Synthesis of Gold Nanoparticles Using Pomegranate Peel Extract and Anti-bacterial activity

Gold nanoparticles (AuNPs) were created utilizing pomegranate (Punica granatum) peel extract as a natural reducing and stabilizing agent in an environmentally friendly green synthesis method. Pomegranate peel contains polyphenols and antioxidant phytochemicals that efficiently convert hydrogen tetrachloroaurate (HAuCl₄) to generate stable AuNPs, as indicated by a distinctive color change from light yellow to wine red and validated using UV-Vis spectroscopy.

Внутривидовая изменчивость Hemerocallis minor Mill. в условиях лесостепи Западной Сибири

В статье изложены результаты изучения внутривидовой изменчивости Hemerocallis minor – лилейника малого в условиях лесостепи Западной Сибири (Новосибирск). В коллекции Центрального сибирского ботанического сада СО РАН вид представлен образцами из природных популяций Забайкалья, Томской области и Тувы. Анализ многолетних фенологических данных выявил достоверно значимые различия образцов по датам фенофаз и длительности межфазных периодов, за исключением сроков плодоношения.

Apomixis in Anthoxanthum nitens and A. repens (Poaceae L.) in the Saratov region flora

The article presents the results of cytoembryological analysis of four cenopopulations of two Anthoxanthum L. species from the fl ora of the Saratov region: A. nitens (Weber) Y.Schouten & Veldkamp and A. repens (Host) Veldkamp. Embryological characters of Hieracium-type apospory and pseudogamy were recorded in plants of both species: (1) formation of several eight-nucleate seven-celled embryo sacs in the ovule; (2) development of the proembryo in unfertilized megagametophytes with intact polar nuclei.

Optimization of sample preparation technique and the possibility of using different types of plant material of two species of the genus Colchicum (Colchicaceae) in flow cytometry

The article presents the results of testing and optimization of the sample preparation technique for fl ow cytometric analysis of two species that have not been previously studied in this aspect: Colchicum bulbocodium subsp. versicolor and C. laetum. We are using optimal LB01 buff er with added sodium thiosulfate, as internal standards we take Petroselinum crispum and Secale cereale. For the fi rst time, the DNA content in living samples of C. bulbocodium subsp. versicolor (2C = 8.049 pg) and C.

Addition to the summary “Flora of the Lower Volga Region” of the class of Liliopsida Typhaceae – Hydrocharitaceae (according to the Engler system) based on the materials of the herbarium of the SARAT State University

The article presents the results of a comparative analysis of the distribution of plant species belonging to the families Typhaceae, Potamogetonaceae, Ruppiaceae, Juncaginaceae, Alismataceae, Butomaceae, Hydrocharitaceae in the Lower Volga region based on the materials of the herbarium of the Saratov State University named after N. G. Chernyshevsky (SARAT).

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