Биология

 The article reports on the discovery of Keller’s broomrape (Orobanche kelleri Novopokr., Orobanchaceae) in the Saratov region, a species with a fairly extensive range but extremely sporadic occurrence. Information on the distribution of the species in Europe and Central Asia is provided. The nearest known occurrences of this species are from the Rostov and Volgograd regions. O.

The article presents the results of a comparative analysis of post-juvenile molt in two widespread passerine species – the Willow Warbler (Phylloscopus trochilus) and the Reed Bunting (Schoeniclus schoeniclus) – in the conditions of the extreme North (Pasvik Nature Reserve, Murmansk region). The study was conducted at the Varlam Island research station in 2022–2024. Birds were captured using mist nets, followed by in vivo description.

The article presents the results of studying the intraspecific variability of Hemerocallis minor under the forest-steppe conditions of Western Siberia in the collection of the Central Siberian Botanical Garden SB RAS (Novosibirsk). The analysis of phenological and morphological traits of accessions from natural populations in Transbaikalia, the Tomsk oblast, and Tuva revealed significant intraspecific variability.

The study of the resistance of plants obtained as a result of introgressive breeding to various factors, including osmotic stress, is an important stage of breeding work. The objects of research are two varieties of spring soft wheat – Saratovskaya 70 and Saratovskaya 68 and three lines – L3 (C68/ThatcherLr28*4//C68), L4 (C68/ThatcherLr29*4//C68), L12 (C70/ThatcherLr29* 4//C70). PEG was used as a cultivation substrate. The eff ect of osmotic stress on growth was assessed by morphometric parameters, the seedling root availability index, and the seedling root index.

Eggplant, or dark-fruited nightshade (Solanum melongena L., 1753), is an important agricultural crop, for which the use of biopreparations based on antagonist microorganisms is advisable. The success of introducing such strains into an agrocenosis is largely determined by their interaction with the host plant’s autochthonous microbial community, which can vary significantly across regions. This study analyzed the microbiota structure of eggplant plants grown in the Saratov region. One hundred healthy leaf samples were microbiologically analyzed.

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.

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.