Quince Research Articles

Characterization of gluten-free cupcakes without sucrose based on defatted soybean flour and monk fruit.

This study aimed to produce and characterize a novel gluten-free cupcake for celiac and diabetes people. For this purpose, wheat flour and sugar in the cupcake formulation were fully replaced with soy flour and monk fruit. Also, samples containing wheat flour with sugar and monk fruit were prepared for comparison. The gluten-free cupcake without sucrose had a less specific volume and porosity index. To improve these properties, Cydonia oblonga (Cydonia Vulgaris) and Plantago ovata (Plantago genus) were used individually and in combination at concentrations of 1 and 2%. The cake containing no gum was made as a control as well. It was observed that addition of gums had positive effects on the specific volume, porosity index, and weight loss of cakes, but their incorporation increased their hardness. Based on the results, the fabrication of a novel and successful gluten-free cupcake replaced with soy flour, monk fruit, and gum is possible.

The Response to Natural Infections with Erwinia amylovora Burrill of Five Quince (Cydonia oblonga Mill.) Cultivars in Bistrița Area, Romania

Erwinia amylovora is the most damaging bacterial disease of quince, causing a lot of damage to this crop. In cases of severe infections, this disease could even cause the death of the tree. The climatic conditions in Bistrita region were favourable for fire blight outbreak in 2022, and gave us the opportunity to study the differences manifested by five quince cultivars ('Aromate', 'Aurii' 'Bereczki', 'Adonia' and 'Cedonia') when naturally infected with Erwinia amylovora Burrill. The second wave of infections, in September, was significantly less damaging than the first one which occurred in June. Overall, after assessing the frequency of the blighted shoots of the mentioned quince cultivars, in June and in September of the year 2022, we concluded that there were significant differences between responses to natural infection Erwinia amylovora of these cultivars. The data showed that the cultivars 'Aromate' and 'Aurii' have a better behaviour than the Hungarian cultivar 'Bereczki', while the Romanian cultivars 'Adonia' and 'Cedonia' appeared to be very susceptible under the climatic conditions of the year 2022 in Bistrita area.

Fruit Mineral Content and Postharvest Quality of Quince (Cydonia oblonga Mill.) as Affected by Soil Lime Stress

Fruit Mineral Content and Postharvest Quality of Quince (Cydonia oblonga Mill.) as Affected by Soil Lime Stress

Effect of shading nets on environmental conditions and fruit abscission in quince (Cydonia oblonga L.)

The quince tree has been cultivated since ancient times in the province of Isfahan in Iran. Flower and fruit drop is one of the most important problems in the cultivation of quince in Iran. In this study, the role of shading nets as a protective factor in quince orchard was investigated to adjust climatic factors and reduce flower and fruit drop. A 20-year-old quince orchard was equipped with shading net system, and another part was compared as a control plot without shading net system in 2021 and 2022. The color of shading net and the percentage of shading were 30% green, 50% green and 50% white. According to the results, flowers opened five days later under the shading nets than outdoors. Percent fruit set, leaf length and width, number of fruits, and yield were significantly higher under the shade net than outdoors. Green 30% had the highest chlorophyll fluorescence index. The fruit set percentage and yield inside the shading nets were more than twice that outside. Total soluble solids and the abscission percentage in the control plot were more than the plot under nets. According to meteorological data, the temperature inside the shade netting was only 0.33–0.67 °Celsius lower than outside, but the radiation intensity outside the nets (30,362.44 lx) was more than two and a half times the amount of radiation under the shading nets (11,876.02 Lux). According to the obtained results, it is recommended to use the shade nets in quince orchards, where happened abscission of flowers and fruits leads to a decrease in yield. The green shade net color of 30 and 50% is recommended for orchards due to the higher chlorophyll fluorescence index, fruit set percentage, number of fruits, and yield.

Biosynthesis of iron oxide nanorods using Cydonia oblonga leaf extract and its application as a catalyst in electrochemical detection of nitrite

Biosynthesis of iron oxide nanorods using Cydonia oblonga leaf extract and its application as a catalyst in electrochemical detection of nitrite

Salt Stress Tolerance of Pyrus spp. and Cydonia oblonga Genotypes Assessed by Morphological, Biochemical and Dehydrin Gene Expression Analysis

Salt Stress Tolerance of Pyrus spp. and Cydonia oblonga Genotypes Assessed by Morphological, Biochemical and Dehydrin Gene Expression Analysis

Distinguishing Seed Cultivars of Quince (Cydonia oblonga Mill.) Using Models Based on Image Textures Built Using Traditional Machine Learning Algorithms

Different cultivars of seeds may have different properties. Therefore, distinguishing cultivars may be important for seed processing and product quality. This study was aimed at revealing the usefulness of innovative models developed based on selected image textures built using traditional machine algorithms for cultivar classification of quince seeds. The quince seeds belonging to four cultivars ‘Uspiech’, ‘Leskovac’, ‘Bereczki’, and ‘Kaszczenko’ were considered. In total, 1629 image textures from different color channels for each seed were extracted from color images acquired using a flatbed scanner. Texture parameters were used to build models for a combined set of selected textures from all color channels, sets of selected textures from color spaces RGB, Lab, and XYZ, and individual color channels R, G, B, L, a, b, X, Y, and Z using algorithms from different groups. The most successful models were developed using the Logistic (group of Functions), IBk (Lazy), LogitBoost (Meta), LMT (Trees), and naïve Bayes (Bayes). The classification accuracy reached 98.75% in the case of a model based on a combined set of textures selected from images in all color channels developed using the Logistic algorithm. For most models, the greatest misclassification of cases was observed between seeds ‘Bereczki’ and ‘Kaszczenko’. The developed procedure can be used in practice to distinguish quince seeds in terms of a cultivar and avoid mixing seed cultivars with different properties intended for further processing.

Identification and Characterization of Diplodia parva and Diplodia crataegicola Causing Black Rot of Chinese Quince.

Fungal isolates from infected Chinese quince trees were found to cause black rot in Yeongcheon, Gyeongsangbuk Province, Korea. The quince leaves withered and turned reddish-brown and fruits underwent black mummification. To elucidate the cause of these symptoms, the pathogen was isolated from infected leaf and fruit tissues on potato dextrose agar and Levan media. Several fungal colonies forming a fluffy white or dark gray mycelium and two types of fungi forming an aerial white mycelium, growing widely at the edges, were isolated. Microscopic observations, investigation of fungal growth characteristics on various media, and molecular identification using an internal transcribed spacer, β-tubulin, and translation elongation factor 1-α genes were performed. The fungal pathogens were identified as Diplodia parva and Diplodia crataegicola. Pathogenicity tests revealed that the pathogen-inoculated fruits exhibited a layered pattern, turning brown rotting; leaves showed circular brown necrotic lesions. The developed symptoms were similar to those observed in the field. Fungal pathogens were reisolated to fulfill Koch's postulates. Apples were inoculated with fungal pathogens to investigate the host range. Strong pathogenicity was evident in the fruits, with browning and rotting symptoms 3 days after inoculation. To determine pathogen control, a fungicidal sensitivity test was conducted using four registered fungicides. Thiophanate-methyl, propineb, and tebuconazole inhibited the mycelial growth of pathogens. To the best of our knowledge, this is the first report on the isolation and identification of the fungal pathogens D. parva and D. crataegicola from infected fruits and leaves of Chinese quince, causing black rot disease in Korea.

Metabolite profiling and Ameliorative effect of quince (Cydonia oblonga) leaves against doxorubicin induced cardiotoxicity in Wistar rats

Quince (Cydonia oblonga) leaves are traditionally reported to alleviate the risk of cardiovascular disease. The study envisaged to explore the in vitro and in vivo phytochemical and cardio protective potential of quince extract respectively. Different solvent extracts (Aqueous, Ethanolic, Hydroethanolic, Methanolic) of quince leaf obtained via two different extraction methods (Ultrasonication and Reflux) were evaluated for the phytochemical and antioxidant analysis. Among all the extracts, quince ethanolic extract, extracted via sonication was found to have the maximum phenolics (39.89 ± 0.67 mg GAE/g DW), flavonoids (21.51 ± 1.0 mgRE/g DW) and an anti-oxidant potential 2,2-diphenyl-1-picryl-hydrazyl radical (DPPH) with IC50 value of 168.88 ± 2.24 μg/ml. The High-performance thin layer chromatograph (HPTLC) and ultrahigh performance liquid chromatography mass spectrometry (UPLC-MS) analysis confirmed the presence of bio active compounds. Furthermore, the in vivo activity was ascertained against Doxorubicin (DOX) induced cardio toxicity in rats fed orally with the extract at 160 and 320 mg/kg body weight. The pre-treated groups significantly assuaged the changes induced by DOX in the electrocardiogram (ECG). Additionally, it mitigated the elevation in the blood serum parameters; aspartate transaminase (AST), lactate dehydrogenase (LDH), creatinine kinase-MB (CK- MB) and also repressed glutathione (GSH) depletion and rise in malondialdehyde (MDA) level induced by DOX. Furthermore, improvement in histopathological changes of the heart tissue concomitant to DOX induced toxicity was also observed such as, reduced degeneration, necrosis, inflammation and apoptosis. Thus, it could be concluded that cardioprotective activity of quince extract accredited to the occurrence of phytoconstituents prevented the DOX induced cardiotoxicity and helped to reinstate the cardiac damage in rats.

Quantitative ethnobotanical study of medicinal plants used by the indigenous communities of Shawal Valley, District North Waziristan, Pakistan

Background: The current survey aimed to assess the traditional knowledge and use of therapeutic plants to treat various respiratory disorders by traditional healers. The local communities of District North Waziristan are reliant on therapeutic plant species for their primary health care needs. Methods: Ethnobotanical data were collected through semi-structured interviews. A sum of 130 informants (107 male and 23 female) selected randomly. Ethnobotanical data was quantitatively analyzed by using Use Value (UV), Relative Citation of Frequency (RFC), and Fidelity Level (FL). Results: A total of 56 plants related to 32 plant families were recorded which were used to cure 24 various respiratory disorders. Lamiaceae (7 species) was the most prevalent plant family, followed by Asteraceae (5 species), Moraceae and solanaceae (4 species) each, 8 families have (2 species each), while the remaining 20 families has only (1 species each).The dominant growth form was herbs (53.57%), while leaves (28.57%) were the leading plant part used in remedies preparation for respiratory disorders. The dominant method of medications preparation was decoctions (42.86%), which were all administered orally. The plant species with highest use values were Ephedra procera (0.87), followed by Morus nigra (0.86), while the highest RFC values were recorded for Ephedra procera (0.36), followed Cydonia oblonga (0.35), Morus nigra (0.34). The therapeutic plant species with maximum use values reported in the survey may indicate the possible presence of important bioactive compounds which need a search for potential new drugs to treat various respiratory disorders. Conclusions: The study accomplishes that indigenous communities yet prefer therapeutic plants species over allopathic drug for curing different disorders. However this valuable traditional information is limited to elder people. So, attention is required to conserve this traditional knowledge.

Микрорельеф поверхности листьев дикорастущей айвы Cydonia oblonga Mill. (Rosaceae) лесных фитоценозов предгорий Дагестана

Cryo-scanning electron microscopy was used to study the micromorphology of the leaf surface of the wild-growing Cydonia oblonga Mill. (Rosaceae). The only habitat of wild-growing quince in Russia is the southern part of Dagestan. Mountain forest phytocenoses of Dagestan provide unique grounds for studying the adaptive potential of plants, since growing conditions change not only according to the change of seasons, but also directly depend on the altitude above sea level. The adaxial (upper) and abaxial (lower) surfaces of the studied samples have a number of micromorphological and microstructural features. The epidermis on the adaxial and abaxial sides differed not only in structural organization, but also in the specifics of surface micromorphology. The most striking feature of the micromorphology of the adaxial and abaxial sides of the leaf blade surface is cuticular folding in the form of microstrands on the main cells of the epidermis, as well as radial striations, peristomatic rings, and protrusions in the stomata region. Regardless of the habitat of fruit plants, their leaves were hypostomatous with anomocytic stomata of two types (primary and secondary), differing in qualitative and quantitative indicators. The primary stomata had a more prominent cuticular pattern and were also larger than the smaller secondary stomata. It should be noted that the presence of several types of cuticular folding, as well as stomatal polymorphism, are common features of other studied species of the subfamily Pyrinae, early Maloideae (Rosaceae). According to the data obtained, the identified features of cuticular folding are stable within the species and can be used as additional taxonomic characters.

Changes in Physicochemical and Bioactive Properties of Quince (Cydonia oblonga Mill.) and Its Products.

Quince (Cydonia oblonga Miller) is a plant that is commonly cultivated around the world, known for centuries for its valuable nutritional and healing properties. Although quince fruit are extremely aromatic, due to their high hardness and sour, astringent, and bitter taste, they are not suitable for direct consumption in an unprocessed form. However, they are an important raw material in fruit processing, e.g., in the production of jams, jellies, and juices. Quince fruits fall under the category of temperate fruits, so their shelf life can be predicted. Considering that technological processing affects not only the organoleptic properties and shelf life but also the functional properties of fruits, the aim of this research was to determine the impact of various types of technological treatments on the physicochemical and bioactive properties of quince fruit. In fresh, boiled, and fried fruits and in freshly squeezed quince fruit juice, basic parameters, such as the content of dry matter, moisture, soluble solids (°Brix), pH, total acidity, water activity, and color parameters (L*a*b*) were determined. The content of key bioactive ingredients, i.e., tannins, carotenoids, flavonoids, phenolic acids, and total polyphenols, was also determined, as well as the antioxidant activity of raw and technologically processed (cooked, fried, and squeezed) quince fruits. The conducted research showed that fresh quince fruit and processed quince products can be a very good source of bioactive ingredients in the diet, such as tannins (3.64 ± 0.06 mg/100 g in fresh fruit; from 2.22 ± 0.02 mg/100 g to 5.59 ± 0.15 g/100 g in products), carotenoids (44.98 ± 0.18 mg/100 g in fresh fruit; from 141.88 ± 0.62 mg/100 g to 166.12 ± 0.62 mg/100 g in products), and polyphenolic compounds (246.98 ± 6.76 mg GAE/100 g in fresh fruit; from 364.53 ± 3.76 mg/100 g to 674.21 ± 4.49 mg/100 g in products). Quince fruit and quince products are also characterized by high antioxidant properties (452.41 ± 6.50 µM TEAC/100 g in fresh fruit; 520.78 ± 8.56 µM TEAC/100 g to 916.16 ± 6.55 µM TEAC/100 g in products). The choice of appropriate technological processing for the quince fruit may allow producers to obtain high-quality fruit preserves and act a starting point for the development of functional products with the addition of quince fruit in its various forms, with high health-promoting values and a wide range of applications in both the food and pharmaceutical industries.

Effect of Various Drying Methods on Physicochemical and Bioactive Properties of Quince Fruit (Cydonia oblonga Mill.)

The quince (Cydonia oblonga Mill.), due to its valuable bioactive properties and high health-promoting potential, is becoming more and more popular for the prevention of many free radical diseases. Due to the high hardness of the flesh and its bitterness and astringency, quinces are rarely eaten in the form of fresh fruit, and much more often in the form of various preserves, or in the form of dried additives, e.g., to the tea. Heat treatment (including drying) affects not only the content of bioactive compounds, but also the antioxidant activity and organoleptic characteristics. Therefore, this study examined the physicochemical properties of quinces (including the content of dry matter, soluble solids (°Brix), water activity (aw), pH, total acidity and color changes (in the L*a*b* space)), fresh and dried by various methods, i.e., freeze-drying and convection at 50 °C and 70 °C. In addition, the effect of various drying conditions on the content of selected bioactive compounds, i.e., tannins, carotenoids, flavonoids, phenolic acids and total polyphenols, was assessed, as well as the antioxidant properties of fresh quinces and quinces dried under different conditions. Based on the research, it can be concluded that the applied processes of the dehydration of quinces significantly changed both the physicochemical properties and the content of biologically active ingredients and antioxidant properties, while both fresh and dried fruit provide nutritionally valuable bioactive ingredients and show high antioxidant potential. Considering the great taste and bioactive qualities of the common quince, introducing it to the daily diet, whether in a traditional form (dried fruit, fruit preserves) or in the form of dietary supplements, can be an important element in the prevention of many civilization diseases.

Formulation, Statistical Optimization, and In Vivo Pharmacodynamics of Cydonia oblonga Mucilage/Alginate Mucoadhesive Microspheres for the Delivery of Metformin HCl.

In recent years, attention has shifted toward the utilization of natural polymers for encapsulation and sustained release of health-hazardous drugs. The purpose of this work is to define and assess the sustained delivery potential and mucoadhesive potential of a Cydonia oblonga mucilage (COM) and sodium alginate (Na-Alg)-constituting polymeric delivery carrier of antidiabetic drugs with a specific end goal to retain metformin HCl in the stomach while expanding the drug's bioavailability. Metformin HCl was encapsulated in mucoadhesive microspheres by an ionic gelation method. Polymers with different combinations were tried, and the resulting mucoadhesive COM/Na-Alg microspheres were assessed for particle size (mm) PS/Y1, drug encapsulation efficiency DEE (%)/Y2, and in vitro percentage cumulative drug release R12h/Y3 using Drug Design Expert software version 10. The response surface methodology by a 32-central composite design predicted optimal synthesis parameters for the microspheres to be 295 mg for COM and 219 mg for Na-Alg. An optimized formulation was prepared under these conditions and used to evaluate the micrometric properties, morphology and structural characteristics, swelling behavior, in vitro drug release, and kinetics. Acute toxicity studies were carried out on blank COM/Na-Alg microspheres to deem them safe for in vivo studies. The DEE (%) was calculated to be 85.8 ± 1.67, whereas scanning electron microscopy (SEM) showed a coarse surface with characteristic wrinkles and cracks with an optical microscopic particle size of 0.96 ± 2.45. The ex vivo tests showed great mucoadhesive properties and good swelling behavior with pH-responsive drug release and a significant reduction in in vivo blood glucose levels. The results advocated the use of optimized microspheres to enhance the bioactivity with a possible dose reduction, making it less symptomatic, reducing the expense of the treatment, and subsequently facilitating better patient compliance.

Quince extract resists atherosclerosis in rats by down-regulating the EGFR/PI3K/Akt/GSK-3β pathway

We identified the effective components and the underlying mechanisms of Quince (Cydonia oblonga Mill, COM) extract against atherosclerosis. The effective components of COM extract were identified with UHPLC-Q-TOF-MS/MS. Network pharmacology was performed. A rat model of atherosclerosis induced by high-fat emulsion combined with vitamin D3 was established. The anti-atherosclerosis effect of COM extract was evaluated from various aspects such as blood lipid regulation, anti-oxidative stress, anti-inflammatory response, and vascular protection function. We identified 14 serum components of COM extract using UHPLC-Q-TOF-MS/MS. Through prediction, 573 targets were obtained, among which 224 targets were atherosclerosis specific targets. The key targets included GSK3β, ESR1, EGFR, and HSP90AA1. The key signaling pathway was PI3K-Akt signaling pathway. Pharmacodynamics analysis showed that COM extract reduced the levels of TC, TG, and LDL-C as well as ALT and AST, while increased the level of HDL-C. Mechanistically, COM extract significantly increased serum SOD and GSH-Px activities, but decreased MDA content in atherosclerosis rats, showing antioxidant effects. Meanwhile, COM extract significantly down-regulated the levels of pro-inflammatory factors IL-1β, IL-6, TNF-α and CRP, but up-regulated anti-inflammatory factor IL-10. Additionally, COM extract increased the levels of NO, eNOS, and 6-keto-PGF1α; whereas, decreased the levels of ET-1 and TXB2. Furthermore, COM extract significantly inhibited the mRNA and protein levels of EGFR, p-PI3K, p-AKT, GSK-3β, Bax, and Caspase-3 as well as the Bax/Bcl-2 ratio. Conclusively, COM extract exerts hypolipidemic, anti-oxidative, anti-inflammatory, anti-thrombotic and vascular endothelium protective effects on atherosclerosis rat model, which may be related to the inhibition of EGFR/PI3K/AKT/GSK-3β signaling pathway.

Ethnomedicinal plants uses for the treatment of respiratory disorders in tribal District North Waziristan, Khyber Pakhtunkhawa, Pakistan Authors

Background: The current survey aimed to assess the traditional knowledge and use of therapeutic plants to treat various respiratory disorders by traditional healers. The local communities of District North Waziristan are reliant on therapeutic plant species for their primary health care needs. Methods: Ethnobotanical data were collected through semi-structured interviews. A sum of 130 informants (107 male and 23 female) selected randomly. Ethnobotanical data was quantitatively analyzed by using Use Value (UV), Relative Citation of Frequency (RFC), and Fidelity Level (FL). Results: A total of 56 plants related to 32 plant families were recorded which were used to cure 24 various respiratory disorders. Lamiaceae (7 species) was the most prevalent plant family, followed by Asteraceae (5 species), Moraceae and solanaceae (4 species) each, 8 families have (2 species each), while the remaining 20 families has only (1 species each).The dominant growth form was herbs (53.57%), while leaves (28.57%) were the leading plant part used in remedies preparation for respiratory disorders. The dominant method of medications preparation was decoctions (42.86%), which were all administered orally. The plant species with highest use values were Ephedra procera (0.87), followed by Morus nigra (0.86), while the highest RFC values were recorded for Ephedra procera (0.36), followed Cydonia oblonga (0.35), Morus nigra (0.34). The therapeutic plant species with maximum use values reported in the survey may indicate the possible presence of important bioactive compounds which need a search for potential new drugs to treat various respiratory disorders. Conclusions: The study accomplishes that indigenous communities yet prefer therapeutic plants species over allopathic drug for curing different disorders. However this valuable traditional information is limited to elder people. So, attention is required to conserve this traditional knowledge.

Methods of adventitious rooting of rootstocks for quince trees

The aim was to evaluate techniques to enhance the adventitious rooting of ‘Adams’, ‘BA-29’, ‘EMA’, ‘EMC’ and ‘Sydo’ (Cydonia oblonga) quince trees as well as Chaenomeles sinensis quince trees with a rootstock for C. oblonga. Woody and semihardwood cuttings were removed from six quince trees, and the rooting capacity was evaluated. Seedlings of the C. sinensis rootstock were produced, and double grafting was performed using the six quince trees as intergrafting and ‘Bereckzi’ as grafts and the anatomical sections were evaluated. The seedlings were transplanted to pots. Half the length of the intergrafting was buried to stimulate adventitious rooting. Double grafting is viable. A low rooting capacity is observed for the ‘BA-29’ and C. sinensis quince tree combination, both in their cuttings and when they are the intergrafting.

Comprehensive Assessment of Intergeneric Cross-compatibility of Six Fruit Tree Species in the Tribe Maleae (Rosaceae) Based on <i>In Vivo</i> Pollen Tube Growth and Field Pollination

The development of intergeneric hybrids for horticultural crops has been attempted to introduce new quality and resistance traits and to enlarge the gene pool. Interspecific and intergeneric hybridization are often hindered by incompatibility reactions occurring at various stages of hybridization, from early pollination to initial growth, and the reproductive stages of the progeny. In this study, we investigated intergeneric and interspecific cross-compatibility among six species in the tribe Maleae (Rosaceae), namely, Pyrus communis (European pear), P. pyrifolia (Japanese pear), Malus × domestica (apple), Eriobotrya japonica (loquat), Cydonia oblonga (quince), and Pseudocydonia sinensis (Chinese quince). In vivo pollen tube growth tests showed the presence of a postmating, prezygotic barrier in many cross-combinations, in which cross-compatibility was regulated by both genetic distance and crossing direction. Strong hybridization barriers were observed in pollen tube growth and fruit setting when intergeneric hybridization was performed with E. japonica, a species phylogenetically distant from the others studied. Different compatibility reactions in reciprocal crosses were observed in some intergeneric hybridizations; C. oblonga as a pollen donor was incompatible with P. sinensis, whereas the reciprocal cross was compatible, resulting in the development of hybrid seedlings. Furthermore, the pollen tube growth rate differed among Pyrus species when pollinated on the apple pistils, suggesting divergence of cross-compatibility response in a specific linage. Factors affecting intergeneric hybridization are discussed with reference to the genetic distance between species and morphological characteristics such as pistil length. Our comprehensive assessment of intergeneric cross-compatibility will help provide a way to overcome crossing barriers and develop new hybrid crops in the tribe Maleae.

Investigation of the Antioxidant Role of Acidic and Alkaline Hydrolysates of Pectin Isolated from Quince (Cydonia oblonga)

Investigation of the Antioxidant Role of Acidic and Alkaline Hydrolysates of Pectin Isolated from Quince (Cydonia oblonga)

THEORETICAL FOUNDATIONS OF FORMING A COLLECTION OF SUBTROPICAL FRUIT CROPS BASED ON THE AGROBIOSCIENCE STATION OF THE V.G. KOROLENKO POLTAVA NATIONAL PEDAGOGICAL UNIVERSITY

The results of studying the features and developing the establishment of a collection of subtropical fruit crops in open field conditions based on the agro-bioscience station of the V. G. Korolenko Poltava National Pedagogical University are presented. The theoretical foundations and recommendations regarding the peculiarities of wintering and collection formation in the conditions of a moderate climate of the forest-steppe of Ukraine are considered. A number of previously successfully introduced crops are identified, their species composition is characterized, and a series of factors that affect or may affect the further introduction process are established. 
 The idea of creating an introduction point with the formation of the main collection, which will include species such as Asimina triloba L., Zizyphus jujuba Mill., Punica granatum L., Ficus carica L., Diospyros virginiana L., Cydonia oblonga Mill., Prunus dulcis Mill., Mespilus germanica L., and Chaenomeles japonica Lindl., is put forward.