The results of studies on the improvement of technology for producing highquality planting material of half-high blueberry and Arctic bramble by the method of clonal micropropagation are presented in the current paper. Creation of forest berry plantations in peat extraction areas allows reducing environmental damage and significantly increasing the efficiency of the timber industry. In recent decades, there has been an increasing interest in the creation of forest berry plantations on drained and cutover peatlands in Russia and other countries. It is necessary to use varietal planting material for the successful cultivation of forest berry plants on an industrial scale. Clonal micropropagation is the most effective of the vegetative methods for obtaining planting material, which allows receiving a huge amount of healthy planting material all year round in the conditions of a small laboratory area. Chloride-free ecosterilizer and bleaching agent based on sodium hypochlorite “Belizna” with an exposure of 15 and 20 min showed high efficiency in sterilization of explants of half-high blueberry and Arctic bramble. The highest viability of explants of the studied forest berry crops was observed when sterilized with a 0.1 % mercuric chloride solution and 15 min exposure, and its sharp decrease at 20 min exposure. At the stage of micropropagation, with an increase in the concentration of cytokinin 6-BAP from 0.5 to 1.0 mg/L on the nutrient Woody Plant Medium the number of shoots in regenerated plants of half-high blueberry (Northcountry and Northblue cultivars) and Arctic bramble (Anna and Sofia cultivars) increased. The effect of the concentration of IBA-derived auxin on the number and length of roots of regenerated plants was observed at the in vitro rooting stage.

Creation of plantations of the most popular species of forest berry plants with high nutritional and medicinal value is advisable in connection with the reduction of such natural resources and the increased demand for berry products, as well as for the biological reclamation of depleted peat deposits. The paper shows the research results of clonal micropropagation of forest berry plants (cranberry, American cranberry, half-high blueberry, Arctic bramble, lingonberry, Kamchatka bilberry) of promising cultivars and forms using various types of lighting (white LED lamps, LED lamps with a combination of white, red and blue spectra, as well as white fluorescent lamps). Plants were cultivated using WPM and MS nutrient media with the addition of cytokinins 2-iP and 6-BAP in various concentrations. The largest number (3.3–16.9 pcs) and the maximum total length (13.8–251.1 cm) of microshoots of cranberry (Dar Kostromy cultivar, hybrid form 1-15-635), American cranberry (Ben Lear cultivar, hybrid form 1-23-3), Arctic bramble (Anna cultivar, hybrid form K-1), lingonberry (Kostromskaya rozovaya and Rubin cultivars) and Kamchatka bilberry (Sakhalinskaya and Kurilskaya forms) were observed under lighting by LED lamps with a combination of white, red and blue spectra at the “proper micropropagation” stage. The formation of the largest number (13.1 pcs) and the maximum length (98.7 cm) of microshoots of half-high blueberry (Northblue cultivar, hybrid form 23-1-11) was observed under lighting by white fluorescent lamps. There were no significant differences in biometric parameters of plants under different types of lighting depending on cultivars and forms. The use of LED lamps with a combination of white, red and blue spectra has a significant effect on the formation of microshoots of forest berry plants during clonal micropropagation. For citation: Makarov S.S., Upadyshev M.T., Kuznetsova I.B., Zaushintsena A.V., Kulikova E.I., Surina E.A. The Use of Lighting of Various Spectral Ranges for Clonal Micropropagation of Forest Berry Plants. Lesnoy Zhurnal = Russian Forestry Journal, 2022, no. 6, pp. 82–93. (In Russ.). https://doi.org/10.37482/0536-1036-2022-6-82-93

Introduction. Forest berry plants are popular on the food market and in pharmacy for their high nutritional and medicinal value. Plantations of forest berry plants can proliferate on unused lands, including depleted peatlands. Clonal micropropagation is the most effective method for obtaining large quantities of high quality planting material. Light-emitting diodes are highly effective for clonal micropropagation. The research objective was to study the effect of different spectral ranges on the process of root formation of forest berry plants in vitro. Study objects and methods. The research featured regenerant plants of half-highbush blueberry, arctic bramble, American cranberry, European cranberry, lingonberry, and Kamchatka bilberry of different cultivars. A set of experiments made it possible to study the effect of lighting type on the growth and development of the root system of forest berry plants in vitro using white fluorescent lamps, white spectrum LED lamps, and LED lamps with a combination of white, red, and blue spectra at the in vitro rooting stage of clonal micropropagation. Results and its discussion. The largest number (3.4–14.6 pcs.) and the maximum total length (10.0–156.9 cm) of roots were observed under LED lamps with a combination of white, red, and blue spectra. The effect was by 1.1–2.8 and 2.0–4.5 times higher than in the case of white-spectrum LED lamps, and by 2.3–7.0 and 3.3–14.9 times than in the case of fluorescent lamps. Variety and shape proved to have no significant effect on biometric indicators. Conclusion. LED lamps had a positive effect on the process of rhizogenesis of forest berry plants during clonal micropropagation. They appeared to be more effective than fluorescent lamps. The combination of white, blue, and red spectra increased the biometric parameters of plants at the stage of in vitro rooting.

Более полное вовлечение и эффективное использование недревесных ресурсов леса является одной из актуальных проблем развития лесного комплекса Российской Федерации в рамках обеспечения многоцелевого, рационального и неистощительного лесопользования. Создание плантаций лесных ягодных растений позволит решить проблему биологической рекультивации выработанных торфяных месторождений, а также повысить продуктивность дикорастущих ягодников и увеличить биоразнообразие неиспользуемых земель лесного фонда. Цель работы – изучить перспективы использования клонального микроразмножения как наиболее эффективного способа получения высококачественного сортового посадочного материала лесных ягодных растений для закладки плантаций на рекультивируемых выработанных торфяниках. Приведены результаты исследований клонального микроразмножения лесных ягодных растений – полувысокорослой голубики и клюквы болотной перспективных сортов и гибридных форм – и их адаптации к условиям выработанных торфяных месторождений. Представлены данные по формированию микропобегов и корней растений голубики и клюквы на питательной среде WPM при использовании росторегулирующих веществ. На этапе собственно микроразмножения максимальная суммарная длина микропобегов отмечена у полувысокорослой голубики (23,7 см) при концентрации цитокинина 2-iP 3,0 мг/л, у клюквы болотной (22,7 см) – при концентрации 0,5 мг/л. На этапе укоренения in vitro максимальная суммарная длина корней растений полувысокорослой голубики (12,1 см) и клюквы болотной (51,7 см) выявлена при концентрации ауксина ИУК 1,0 мг/л. Охарактеризована приживаемость растений в нестерильных условиях in vivo в зависимости от состава субстрата и в естественных условиях на выработанных торфяниках. На этапе адаптации к нестерильным условиям in vivo наибольшая приживаемость растений голубики наблюдалась на субстрате из торфа переходного типа и сфагнума (95–98 %), клюквы – на субстрате из торфа верхового типа и сфагнума (100 %). В условиях выработанных торфяников приживаемость растений полувысокорослой голубики и клюквы болотной достигала 100 %. Метод клонального микроразмножения является наиболее эффективным способом получения высококачественного оздоровленного посадочного материала лесных ягодных растений для быстрого размножения перспективных сортов и гибридных форм, создания плантаций с целью рекультивации выработанных торфяников в рамках организации многоцелевого лесопользования.

Cloudberry (Rubus chamaemorus L.) and arctic raspberry (Rubus arcticus L.) are highly nutritional and medicinal but lowyield berries, with some populations being on the verge of extinction. Micropropagation biotechnologies are cost-effective and may provide healthy and plentiful planting material for these valuable berries. Clonal micropropagation of cloudberry and arctic raspberry requires new methods adapted for Russian varieties. This research featured the effect of sterilizing agents on the survival rate of explants of R. chamaemorus and R. arcticus, as well as the effect of growth regulators in the nutrient medium on their organogenesis in vitro. Berries obtained from regenerant plants of R. chamaemorus (Arkhangelsk and Vologda varieties) and R. arcticus (Sofia and Galina varieties) underwent a biochemical analysis. Further research involved the effect of sterilizing agents and exposure time on the viability of explants, as well as the effect of the nutrient medium composition and the concentration of growth regulators on the development of microshoots and roots in vitro. In case of lateral buds, the highest survival rate of both types of explants (80–96%) belonged to the samples sterilized with 0.2% silver nitrate and 5% Lysoformin 3000 for 15 min. In case of etiolated shoots (79–100%), it was the samples treated with 0.2% silver nitrate, 0.01% Nika 2, and 5% Lysoformin 3000 for 10 min. The maximal total length of microshoots in R. chamaemorus (19.4–22.7 cm) was registered at 0.1 mg/L Cytodef in the Murashige and Skoog medium. The maximal total length of roots (46.0–56.6 cm) was obtained when the medium contained 0.5 mL/L indolylacetic acid. As for R. arcticus, the maximal total lengths of microshoots (22.4–22.8 cm) and roots (86.6–89.3 cm) occurred at the same concentrations of growth regulators on 1/2 Murashige and Skoog medium. In this research, Cytodef and indolylacetic acid applied in the process of clonal micropropagation of R. chamaemorus and R. arcticus made it possible to increase the yield of high-quality planting material for commercial plantations.

The results of assessing the decorative features of the feijoa (Acca sellowiana (O.Berg) Burret) culture in the conditions of the Republic of Abkhazia. A. sellowiana has a high nutritional, medicinal and decorative value. A. sellowiana culture is promising for growing on agricultural lands. The objects of research are species plants of F A. sellowiana of seed origin. The yield and sanitary condition of A. sellowiana plants in 2022 are worse than in 2021 due to heavy spring rainfall. Data on the crown architectonics, flowering duration, fruit ornamentality, and leaf roundness index are presented. The most valuable feature is the architectonics of the crown of plants, the least valuable feature is the fruit characteristics (shape, size, evenness). All studied A. sellowiana plants have a semi-bush form with a wide spreading crown. Most of the studied A. sellowiana plants (11 pcs.) had a height of 4.6 to 5,1 m. Most of the studied A. sellowiana plants by the duration of flowering in 2021 (16 pcs.) and in 2022 (14 pcs.) is in the range of 27-28 days, while the 4 samples in 2021 and 1 sample in 2022 had a longest flowering (31-32 days). A scoring system for the characteristics of A. sellowiana is been developed taking into account the conversion coefficient. A. sellowiana plants № 2 and № 25 have the highest indicators for decorative traits (87 points each) and are promising for further study.