Rosa Acicularis Research Articles

The biochemical composition of wild berries and fruits growing in the Southwestern Taimyr

This article presents research findings on the chemical composition of fruits and berries found in the Southwestern Taimyr region, including bilberry (Vaccinium myrtíllus), northern redcurrant (Ribes triste), blueberry (Vaccinium uliginosum), prickly wild rose (Rosa acicularis), lingonberry (Vaccinium vitis-idaea), almost-holarctic crowberry (Empetrum subholarcticum), Siberian rowan (Sorbus sibirica), and cloudberry (Rubus chamaemorus). We revealed that rowan, blueberries, and prickly wild rose are particularly rich in crude fat. Additionally, prickly wild rose, and red currants were found to be high in crude fiber content, while bilberries, red currants, and cloudberries were dominant in crude protein. Potassium and calcium content were highest in prickly wild rose and rowan, while bilberries, red currants, and prickly wild rose had high sodium content. Moreover, crowberries and rowan berries were rich in phosphorus, and lingonberries, rowan berries, bilberries, and cloudberries were abundant in magnesium. Red currants, bilberries, and cloudberries had the highest total amino acid content, with essential amino acids being more prevalent than non-essential ones in redcurrant, bilberry, crowberry, and cloudberry samples. The content included high levels of leucine, isoleucine, valine, and threonine. Overall, the fruits and berries in the Southwestern Taimyr region have significant biological value and could be effectively used in creating functional biologically active substances.

Current state of the cenopopulation of Adonis vernalis L. in the North Kazakhstan region

Тhe current state of the cenopopulation of Adonis vernalis L. (Ranunculaceae), listed in the Red Data Book of Kazakhstan. A. vernalis is widespread in Europe and Asian countries, is widely used in folk medicine in Europe and China due to its cardiorespiratory properties. Studies were conducted to determine the biocenotic parameters of two cenopopopulations. The study showed that the gene pool of the studied populations is in good condition. The first cenopopulation (CP1) is dominated by Festuca valesiaca Gaudin, Lathyrus pisiformis L., projective coverage is 55-60%. The dominant species in the second cenopopulation (CP2) are Betula pendula Roth, Lathyrus pisiformis L., Rosa acicularis Lindl., projective coverage is 50%. The current population needs urgent conservation and restoration measures. This is due to the rapid decline of the resource. The study of the cenopopulations of this species allows to form a new idea about this species, lays the foundation for its further development.

Influence of abiotic environmental factors on the biochemical composition of crop production fruits

The article provides information on the study of the effect of abiotic environmental factors on the quality of fruit and berry and medicinal plants in Volgograd and the region: Carthamus tinctorius L., Ribes aureum Pursh., Rosa rugosa Thunb., Rosa cinnamomea L., Rosa acicularis Lindl., Rosa spinosissima L., Rosa canina L. The studies conducted by the authors make it possible to assess the natural and climatic conditions of the region, as well as the suitability and safety of plant species, which is relevant from the point of view of improving the quality of life and improving the health of the population, as well as the development of crop production. The results of the experiments allowed us to recommend certain types of rosehip, safflower and currant for the production of plant products and use in medicine. During laboratory tests, the content of lead, cadmium, zinc and copper was found in the fruits of experimental plants. The maximum fat content in 1000 g of safflower seeds is achieved by applying a dose of sewage sludge of 10 t/ha with a seeding rate of 250 thousand pieces/ha. it was found out that the content of amino acids in fruit bushes depends on weather conditions – 2020 showed an increase in arginine, glycine, leucine and isoleucine in golden currant, proline in rose hips, which indicates their high drought resistance. It was revealed that the content of zinc (12 mg) and copper (8 mg) increased in the fruits of golden currant in areas located close to highways, which is why the collection of fruits for eating in these areas is not recommended. The characteristics of irrigation norms for species at different heights of the aboveground part are given.

Comparative analysis of the chloroplast genomes of Rosa species and RNA editing analysis

BackgroundThe genus Rosa (Rosaceae) contains approximately 200 species, most of which have high ecological and economic values. Chloroplast genome sequences are important for studying species differentiation, phylogeny, and RNA editing.ResultsIn this study, the chloroplast genomes of three Rosa species, Rosa hybrida, Rosa acicularis, and Rosa rubiginosa, were assembled and compared with other reported Rosa chloroplast genomes. To investigate the RNA editing sites in R. hybrida (commercial rose cultivar), we mapped RNA-sequencing data to the chloroplast genome and analyzed their post-transcriptional features. Rosa chloroplast genomes presented a quadripartite structure and had highly conserved gene order and gene content. We identified four mutation hotspots (ycf3-trnS, trnT-trnL, psbE-petL, and ycf1) as candidate molecular markers for differentiation in the Rosa species. Additionally, 22 chloroplast genomic fragments with a total length of 6,192 bp and > 90% sequence similarity with their counterparts were identified in the mitochondrial genome, representing 3.96% of the chloroplast genome. Phylogenetic analysis including all sections and all subgenera revealed that the earliest divergence in the chloroplast phylogeny roughly distinguished species of sections Pimpinellifoliae and Rosa and subgenera Hulthemia. Moreover, DNA- and RNA-sequencing data revealed 19 RNA editing sites, including three synonymous and 16 nonsynonymous, in the chloroplast genome of R. hybrida that were distributed among 13 genes.ConclusionsThe genome structure and gene content of Rosa chloroplast genomes are similar across various species. Phylogenetic analysis based on the Rosa chloroplast genomes has high resolution. Additionally, a total of 19 RNA editing sites were validated by RNA-Seq mapping in R. hybrida. The results provide valuable information for RNA editing and evolutionary studies of Rosa and a basis for further studies on genomic breeding of Rosa species.

Herbarium of the Institute for Biological Problems of Cryolithozone (SASY): Plant type specimens

This article presents an annotated list of plant type specimens stored in the Herbarium of the IBPC SB RAS (SASY), which is one of the largest in northeast Russia. The Herbarium fund is represented by five departments (vascular plants, mosses, lichens, aphylophore fungi, and algae), where about 95000 herbarium samples are stored exluding algae tests. The Herbarium has a collection of plants from Western and Eastern Siberia, the Far East, and some central regions of Russia. The exchange fund contains more than 3000 species of plants. Typical samples stored in Herbaria are of a particular value. In total, 14 species and 2 subspecies of liverworts, mosses, and vascular plants from 11 families were isolated from the main collection of the SASY Herbarium, which are represented by 14 types, 16 isotypes, 14 paratypes, and 5 epitypes (Frullania ignatovii Sofronova, Mamontov et Potemkin, Barbula jacutica Ignatova, Grimmia jacutica Ignatova, Bednarek-Ochyra, Afonina, J. Muñoz, Aconogonon amgense (V. Mich. et V. Perf.) Tzvel., Androsace gorodkovii Ovcz. et Karav., Anoplocaryum elenae Volot., Artemisia karavajevii Leonova, Astragalus zhiganicus L. Kuzn., and Castilleja galaсtionovae E.G. Nikolin, Castilleja rubra (Drob.) Rebr. var. multicaulis E.G. Nikolin, Castilleja tenella Rebr., Oxytropis scheludjakovae Karav. et Jurtzev, Rosa acicularis Lindl. subsp. melanocarpa L. Kuzn., Sorbocotoneaster pozdnjakovii Pojark. var. cotoneaster L. Kuzn. et Volot., S. pozdnjakovii Pojark. var. sorbus L. Kuzn. et Volot., Salix x zhataica Efimova, Shurduk & Ahti). Plants, the types of which are stored in SASY, represent the indigenous flora of Yakutia and are found quite rarely in this territory; eight of these species are listed in the Red Book of the Republic of Sakha (Yakutia), and 11 species are endemic. For each sample, a quote of the original label is indicated, and a brief ecology, distribution, and rarity category is given. The originality of the publication of each standard sample is indicated by the images of digitized herbarium sheets and their labels.

Post-fire restoration of pine forests in the Badary area, Tunkinskiy National Park, Russia

A morphological variety of pyrogenic transformations characterises burnt areas of the Badary area of the Tunkinskiy National Park (Russia), from heavily damaged areas with a partially remained forest stand to bare spaces of tens of square metres. This enabled us to study the dynamics of the post-fire reproduction of Pinus sylvestris (hereinafter – pine) forests in areas with various environmental conditions. The main goal of our study was to determine the nature of the pyrogenic transformation of ecosystems and to evaluate the success of the forest reproduction. The studies were based on the geobotanical monitoring in two burnt-out areas, differing in the degree and area of wildfire damage due to a creeping fire in 2010. Between 2014 and 2020, we considered the multi-temporal specificity of the species composition of the forest stand, shrub layer, and plant communities. The emergence of the first shoots of undergrowth and new growth has been recorded. The projective cover and the dynamics of the species abundance in all forest layers were fixed. The analysis of the natural reforestation dynamics revealed a similarity of the main geobotanical indicators. Pine seedlings dominated in the undergrowth of the study sites, with a small proportion of Betula pendula. The shrub layer consisted of Rosa acicularis. Rhododendron dauricum has been found there only at the late stage of the study. In the herbaceous layer, the largest proportion was represented by meadow species, with a small participation of forest plants. Differences were revealed during the emergence of first seedlings of undergrowth and new growth, as well as in the size of projective cover of species in all forest layers. The first pine seedlings on a heavily burnt-out study plot were recorded a year earlier than on a less transformed plot. Nevertheless, the height increment and the projective cover of the undergrowth were significantly higher on the burnt-out area of a medium damage degree. On the heavily fire-damaged area, we observed pine seedlings planted by the staff of the Tunkinskiy National Park. A satisfactory rate of seedling survival at the initial stage and further deceleration of growth parameters have been noted. The obtained results indicate the reforestation success and, therefore, a favourable forecast of post-fire recovery of light-coniferous forests in the Badary area of the Tunkinskiy National Park.

Rosa davurica Pall., Rosa rugosa Thumb., and Rosa acicularis Lindl. Originating from Far Eastern Russia: Screening of 146 Chemical Constituents in Three Species of the Genus Rosa

Rosa rugosa Thumb., Rosa davurica Pall., and Rosa acicularis Lindl. contain a large number of target analytes which are bioactive compounds. High performance liquid chromatography (HPLC), in combination with the ion trap (tandem mass spectrometry), was used to identify target analytes in MeOH extracts of R. rugosa, R. davurica, and R. acicularis, originating from the Russian Far East, Trans-Baikal Region, and Western Siberia. The results of initial studies revealed the presence of 146 compounds, of which 115 were identified for the first time in the genus Rosa (family Rosaceae). The newly identified metabolites belonged to 18 classes, including 14 phenolic acids and their conjugates, 18 flavones, 7 flavonols, 2 flavan-3-ols, 2 flavanones, 3 stilbenes, 2 coumarins, 2 lignans, 9 anthocyanins, 3 tannins, 8 terpenoids, 3 sceletium alkaloids, 4 fatty acids, 2 sterols, 2 carotenoids, 3 oxylipins, 3 amino acids, 5 carboxylic acids, etc. The proven richness of the bioactive components of targeted extracts of R. rugosa, R. davurica, and R. acicularis invites extensive biotechnological and pharmaceutical research, which can make a significant contribution both in the field of functional and enriched nutrition, and in the field of cosmetology and pharmacy.

Rosa acicularis (Prickly rose)

This datasheet on Rosa acicularis covers Identity, Distribution, Uses.

Изучение биоразнообразия дикоросов рода Rosa L. в Казахстане и их молекулярно-генетическая идентификация

The reduction of biological diversity is one of the most important problems of the present time. Wild plants are not only a source of genetic resources but are also important for the economy. Species of the genus Rosa L are among the most significant wild-growing fruit plants in Kazakhstan. The genus rosehip (Rosa L.) belongs to the perennial plants of the Rosaceae family. More than 20 wild rosehip species grow in Kazakhstan. In modern plant growing, wild rose is used as a medicinal, food, and ornamental plant. Determination of the species composition, and its morphological and genetic characteristics is the basis for the rational use of plant resources. The aim of our research was to study the biodiversity of plants of the genus Rosa L. based on the morphological characteristics of plants and their molecular genotyping. In this study, we identified 6 plant species of the following genus: Rosa kokanica (REGEL) REGEL ex JUZ., Rosa spinosissima L., Rosa majalis Herrm. (Rosa cinnamomea L.), Rosa acicularis L., Rosa laxa Retz, Rosa canina L. by morphological characteristics and performed identification using the rbcL chloroplast marker. The data obtained can be used for a comparative study of the biodiversity of rosehip plants.

ПОСТПИРОГЕННОЕ ВОССТАНОВЛЕНИЕ ПОДТАЕЖНЫХ СВЕТЛОХВОЙНЫХ ГЕОСИСТЕМ ТУНКИНСКОЙ КОТЛОВИНЫ, ЮГО-ЗАПАДНОЕ ПРИБАЙКАЛЬЕ (НА ПРИМЕРЕ СОСНОВЫХ ЛЕСОВ УРОЧИЩА БАДАРЫ)

We analyzed the post-pyrogenic demutation processes in pine forests of the Badary urochishche in the Tunkinsky National Park, which are periodically exposed to wildfires. The research was based on the geobotanical monitoring in two burnt-out areas, differing in the degree and area of damage due to a creeping fire in 2010. We studied the species composition of the stand, shrub layer and plant communities at different time periods between 2014 and 2020. The emergence of the first shoots of undergrowth and new growth was noted; the size of the projective cover and the abundance dynamics of the species of all forest layers were established. The analysis of the dynamics of natural reforestation revealed the similarity of the main geobotanical indicators. Pine (Pinus sylvestris) sprouts dominated in the undergrowth of the sites under consideration, and only a small percentage fell to the share of silver birch (Betula pendula). The shrub layer consisted of prickly wild rose (Rosa acicularis); daurian rhododendron (Rhododendron dauricum) was noted there only at the late observation stages. In the herbaceous layer, meadow species with a small participation of forest species made up the largest share. There were revealed differences in the time of emergence of the first sprouts of undergrowth and new growth, as well as in the size of the projective cover of species in all forest layers. The first sprouts of pine on a heavily burnt-out key plot were noted a year earlier than on the less transformed area. Nevertheless, the height increment and the projective cover of the undergrowth were significantly greater within the burnt-out area with the medium-degree damage. On the territory heavily damaged by wildfire, we observed pine seedlings planted by the staff of the National Park. Satisfactory survival rate of the seedlings at the initial stage and further deceleration of growth parameters were noted. The results obtained indicate the reforestation success and, therefore, a favorable forecast for post-fire recovery of light coniferous forests in the Badary urochishche.

BERRIES IN WINTER: A NATURAL HISTORY OF FRUIT RETENTION IN FOUR SPECIES ACROSS ALASKA

Plants with persistent fleshy fruits that last throughout fall and into winter and spring are an important source of nutrition for animals and people in boreal, subarctic, and arctic regions, but little information on fruit retention or loss is available for these regions. We evaluated fruit loss for four species across Alaska using data from our Winterberry community science network. Plants of Rosa acicularis Lindl., Viburnum edule (Michx.) Raf., Vaccinium vitis-idaea L., and Empetrum nigrum L. were monitored on a weekly basis throughout fall until snow cover and again after snow melt in 24 communities in six ecoregions in 2016–2020. Observers counted fruits and classified them into “unhealthy” (dried, rotten, or damaged) or “healthy”. Number of fruits lost per day (absolute loss rate) decreased over the course of the fall, but percent of fruits lost per day (relative loss rate) was constant for all species except E. nigrum, where it declined throughout the fall. Rates of loss were similar across ecoregions and climatic gradients, although for V. vitis-idaea the two most southern sites had the lowest relative loss rates and for E. nigrum the sites warmest in summer had the lowest loss rates. Fruit loss pulse events (>15% fruits lost in one week) were uncommon (<5% of weekly observations). At the time of persistent winter snow cover, plants retained 25–50% of fruits, with higher retention in more southern ecoregions. During winter, both relative fruit loss and absolute fruit loss rates dropped compared to fall, but in spring they rebounded to fall levels. Low proportions of unhealthy fruits in E. nigrum and V. vitis-idaea were in part due to rapid abscission of unhealthy fruits, while the other two species tended to retain unhealthy fruits. We estimate that vertebrate frugivores obtain 6–45 × as many fruits in fall as do decomposers / invertebrates. The higher loss rates during the snow-free seasons and constant rates of fruit loss for most of the focal species and locations suggest that longer falls and earlier fruit ripening will lead to lower fruit availability to animals in winter and spring.

State of Rosa acicularis L. coenopopulations in forest park zone of Ekaterinburg

The experiments revealed that the studied fragments of Rosa acicularis L. coenopopulation were normal and full-fledged with single-vertex ontogenetic spectra. They are able to form self-sustaining habitats for several generations and spread over a significant territory. Three periods and six ontogenetic states were distinguished in the ontogenesis of Rosa acicularis L. The age structure had three types of spectrum - left-sided, centered, and right-sided. The difference in the ontogenetic structure depends on influence of anthropogenic factor, ecological and coenotic conditions of rose habitats, and variations in climatic conditions. When analyzing the parameters of coenopopulations, we found that the best conditions for existence of Rosa acicularis L. were in the berry pine forest (FCP5) in the park named after Foresters of Russia and reed grass pine forest (FCP1) in Uktus forest park, where the habitats were characterized by high morphological indicators, numbers and high values of the pregenerative fraction.

Metabolites of Prickly Rose: Chemodiversity and Digestive-Enzyme-Inhibiting Potential of Rosa acicularis and the Main Ellagitannin Rugosin D.

Prickly rose (Rosa acicularis Lindl.) is the most distributed rose species in the Northern Hemisphere, used by indigenous people for various food purposes. The lack of detailed information about the chemical composition of R. acicularis has led us to study the phytochemical composition and metabolic profile of prickly rose extracts using chromatographic techniques. Many groups of phenolic and non-phenolic compounds were quantified in the leaves, flowers, roots and fruits of R. acicularis. Phenolic compounds were the dominant phytochemicals in the aerial parts and roots of R. acicularis. A precise study by high-performance liquid chromatography with photodiode array detection and electrospray ionization triple quadrupole mass spectrometric detection showed the presence of 123 compounds, among which ellagic acid derivatives, ellagitannins, gallotannins, catechins, catechin oligomers, hydroxycinnamates and flavonoid glycosides of kaempferol, quercetin and dihydroquercetin were all identified for the first time. The most abundant phenolic compounds were ellagitannins and flavonoid glycosides, with a maximal content of 70.04 mg/g in leaves and 66.72 mg/g in flowers, respectively, indicating the great ability of R. acicularis organs to accumulate phenolic compounds. By applying a standardized static, simulated gastrointestinal digestion method, we found the inhibitory potential of the leaf extract against digestive α-amylases. A pancreatic α-amylase activity-inhibiting assay coupled with HPLC microfractionation demonstrated high inhibition of enzyme activity by ellagitannin rugosin D, which was later confirmed by a microplate reaction with mammalian α-amylases and the simulated digestion method. This study clearly demonstrates that R. acicularis leaf extract and its main component, ellagitannin rugosin D, strongly inhibit digestive α-amylase, and may be a prospective antidiabetic agent.

Survival of forest strips in ash and slag dump territory of Chita combined heat and power plant

This article is a continuation of research on creation of forest protective strips on the territory of sanitary protection zone with intensive influence of ash and slag dump of the Chita CHPP-1 (TGC-14). Earlier (2017-2019), plantings were made focused on reducing atmospheric pollution, improving soil properties, regulating surface runoff that prevents erosion, fixing ground cover, reducing wind speed and retaining small solid particles. The aim of the research was to analyze survival rate and health of woody and shrubby plant species in protective forest strips; to obtain linear indicators of plant growth and development in experimental plots. In the course of the research, it was found that the overall survival of plants in the experimental plots differed by year. Survival rate of woody and shrubby plant species also differed. Larix gmelinii, Betula pendula, Hippophae rhamnoides, Crataegus sanguinea, Caragana spinosa and Elaeagnus commutata had the highest survival rate in the experiment. The survival of shrubs was generally better than that of trees. Among shrub species, Caragana spinosa (92 and 81 %) and Elaeagnus commutata (95 and 86 %) were characterized by good survival in plantings in 2017 and 2018, respectively. Rosa acicularis (20 %), Spiraea media and Sorbaria sorbifolia (28 %) showed low survival in 2019. The plant survival varies significantly depending on the planting season, types of seedlings and planting technology. The use of planting material (wildfowl) with a large earthen lump increases plant survival in forest protection strips. Unfavorable factors that have a negative impact on the transplanted plants are man-made landscapes, harmful atmospheric impurities from the ash and slag dump. Moreover, competitive relations with herbaceous plants, intensive grazing of animals, insect and disease damage have an additional impact. For healthy growth of plants, it is necessary to perform care for plantings, and organizational measures (fencing of experimental plots with signal tapes). It is important to continue observations and repeat plantings to clarify the adaptive ability of plant species grown in protective plantings, improve planting technology.

The state of the coenopopulations of Rosa acicularis (Lindl.) and Ribes glabellum (Trautv. et Meyer) in Central Yakutia

Data on the vital and ontogenetic structures of the coenopopulations of the Rosa acicularis Lindl. and theRibes glabellum Trautv. et Meyer in different types of phytocenoses in Central Yakutia is given. Based on the indices oforganismic and population scores, 3 states of cenopopulations were established – pessimal, satisfactory, optimal. As aresult of the conducted studies, it was revealed that the majority of coenopopulations are in a satisfactory condition: 88.8 %of the coenopopulations of Rosa acicularis and all the coenopopulations of Ribes glabellum, no pessimal state was found.

Vegetation changes in the chemical composition of Rosa acicularis

In the modern world consumers’ attention is attracted by wholesome, safe and ecologically-friendly food products that can be qualified as "natural". In this regard, wild plants growing in the region seem worth to be involved in processing. Rosaacicularis Lindl is of particular interest as a promising non-traditional medicinal and technical raw material. To assess its quality and use in products recovery, comprehensive information on both the chemical composition of fruits and plant biomass is required. This paper studies the dynamics of biologically active substances transformations in the Rosa acicularis biomass during the growing season. The change in the mechanical composition of the vegetative part of Rosa acicularis in the spring-autumn period is presented. The change in the content of vitamins, organic acids, pectin and tannins, pigments in shoots, leaves, roots and fruits of a plant during the growing season is considered. From May to June - July most biologically active substances are accumulated in the vegetative parts of Rosa acicularis. In fruits the maximum content of biologically active substances falls on August - September. This fact allows recommending not only fruits, but also the vegetative part of the plant for industrial processing.

Urban Naturalization for Green Spaces Using Soil Tillage, Herbicide Application, Compost Amendment and Native Vegetation

Naturalization is a new and promising ecological approach to green space development for urban environments, although knowledge is sparse on techniques to implement it. We evaluated naturalization of eight native trees and shrubs, with site preparation (tillage, herbicide) and soil amendment (compost rates) treatment combinations at six sites in the city of Edmonton, Alberta, Canada. Soil texture improved with all compost rates, and acidity, electrical conductivity and total carbon increased, especially with 100% compost. Soil nutrients generally increased with compost then declined within a year. Plant species with highest potential for use in urban green spaces were Picea glauca, Symphoricarpos albus and Rosa acicularis. Herbicide was the most influential site preparation treatment, positively increasing survival and growth of planted woody species, while negatively lowering non-native species cover and increasing noxious weed cover. Soil amendment with compost influenced cover not species richness, with high compost amendment reducing vegetation cover across sites, and increasing individual plant size. This study suggests amendment of soil with compost and appropriate site preparation can positively influence naturalization of these woody species for urban green spaces.

Glyphosate-Based Herbicides Alter the Reproductive Morphology of Rosa acicularis (Prickly Rose).

Glyphosate is a broad-spectrum herbicide that is widely used in many different commercial formulations. Glyphosate-based herbicides (GBH) are used in forestry operations to reduce populations of plants that compete with merchantable conifers. Past research has found that low-dose GBH applications caused male sterility in agriculturally relevant plants, sparking a need to determine the potential impacts of forestry-related GBH applications on understory plants. We investigated the effects of GBH on the reproductive morphology of Rosa acicularis, a highly prevalent understory shrub within British Columbia, Canada, growing on three operational forestry cutblocks treated with 1.782 kg a.i./ha of glyphosate, in the Omineca Region, and also in a controlled experiment. We analyzed floral and pollen morphology from treated plants and compared these with untreated plants in both scenarios. Pollen viability of treated plants was reduced by an average of 66%, and >30% of anthers were non-dehiscent compared to controls across our three field sites and experimental plants. We also found alterations in pollen and petal morphology in flowers from treated sites and glyphosate residues present in floral tissues 2 years after GBH applications. It is important to fully understand how long GBH-induced change will impact forest vegetation, to preserve natural forest biodiversity and reduce anthropogenic influences on boreal forest ecosystems.

FEATURES OF MICROELEMENTS AND LOW-MOLECULAR WEIGH ANTIOXIDANTS ACCUMULATION IN PLANTS OFTHE GENUS ROSA L.

Wild roses are an important group of plants used as row material for pharmaceutical, cosmetic and food industries. The aim of this study was to determine the microelements (Mn, Fe, Zn, Cu, Cr, Ni, Pb, Co, Cd) content and distribution in the aboveground and underground parts of the Rosa acicularis, R. davurica, R. rugosa, growing in Baikal region. It was found that R. rugosa plants are characterized by a higher Cu content and a low level of Mn; the hips of these plants also accumulate Fe, Zn, and Co. In the sepals, leaves, stems and roots of R. davurica the highest concentrations of Fe are noted, and in the vegetative and generative organs of R. acicularis – Cr. Transport of Zn, Cu, Ni in aboveground parts of plants is mainly acropetal, the remaining elements translocation in basipetal direction. Cd belongs to the elements of strong accumulation in plants of all three species, in addition, species-specific features of some elements accumulation in aboveground and underground organs are revealed. It was found that the fruits, leaves, and stems of Rosa acicularis and Rosa rugosa can serve as a potential source of Mn, Cr, and Co.

Effects of deproteinization on rheological properties of polysaccharides from Rosa acicularis ‘Lu He’ and Rosa acicularis Lindl fruits

Polysaccharides from the fruits of Rosa acicularis are one of the main functional components with superior biological activities and physicochemical properties. Rosa acicularis 'Lu He' is a new variety derived from the wild type Rosa acicularis Lindl. A comparative study was performed on the chemical composition and rheological properties of polysaccharides of rosehip from Rosa acicularis 'Lu He' (RLHP) and Rosa acicularis Lindl (RLDP) before and after deproteinization. The polysaccharide extracts, regardless of deproteinization, were acidic heteropolysaccharides composed of 48.3–51.6% carbohydrate and 29.2–43.2% uronic acid on dry weight basis and small amounts of protein (1.8–6.2%) and polyphenol (2.1–6.3%). Steady shear and frequency scanning measurements were used to evaluate the changes in concentration, temperature, pH and salts on the apparent viscosity and dynamic viscoelasticity of polysaccharide of rosehip solutions. The results showed that the apparent viscosity of RLHP was higher than that of RLDP at the same concentrations (2–6%), while apparent viscosity of RLHP and RLDP increased by 7.2% and 20.5% after deproteinization, respectively. Solutions of polysaccharide of rosehip exhibited shear-thinning behaviors, and higher concentrations caused more significant pseudoplastic effects. The solution properties changed from pseudoplasticity to plasticity when the initial apparent viscosity was below 7.5 mPa s. Thixotropy of polysaccharides of rosehips was stronger after protein removal; moreover, the polysaccharides before deproteinization (RLHP-1, RLDP-1) exhibited better gel properties than the deproteinized polysaccharides (RLHP-2, RLDP-2). This rheological property information will help proper product design to ensure the stability of food products enhanced with polysaccharides from rosehips.