During clonal micropropagation of the Pink-2 (Rosovy-2) gooseberry cultivar at the stage of rhizogenesis, the efficiency of modification of the media with mineral salts according to Quoirin-Lepoivre (QL) was shown by replacing iron, which is standardly used in the form of FeSO4×7H2O together with Na2EDTA, with chelated forms with carboxyl-containing ligands Fe(III)-EDTA and Fe(III)-DTPA and the organophosphate complexone Fe(II)-HEDP. On the 45th and 60th days of subculturing, the distribution in descending order of the impact of chelate iron compounds on the rooting rate of the studied gooseberry plants was as follows: Fe(III)-EDTA>Fe(III)-DTPA> Fe(II)-HEDP> Fe(III)-EDDHA>Fe(III)-HEDP. On the 60th day of subculturing in the best variants of the experiment, the rooting rate of gooseberry microcuttings of cultivar Pink-2 was 86.7-100% compared to 60% in the control variant.

Annotation It is known that far red light is not a source of photosynthetic energy, but affects the adaptation and development processes of plants. Most of these studies are conducted on young plants, but it is important to understand how high-beam light affects the biochemical composition of tomato fruit, which determines the taste and useful properties. The effect of long-range red radiation on the morphological and biochemical parameters of a tomato plant grown under artificial irradiation with LEDs with a different ratio of red and long-range red radiation from 2 to 9 with the same spectral composition in the range 400÷700 nm was studied. The intensity of photosynthesis was assessed by the content of photosynthetic pigments, and the biochemical analysis of tomato fruits included the determination of the concentration of nitrates, ascorbic acid, monosaccharides, and dry matter. It was found that long-range red radiation reduces the stress effect of blue led light, which is expressed in a lower concentration of anthocyanins in tomato leaves. Additional long-range red in the spectrum of LED R26 G81 R93 FR49 mmol/m2 s increased the yield of tomato plants 'T-34' F1 by 60% compared to HPS, and by 16% compared to led irradiation without the use of additional long-range red (R26 G80 R94 FR10 mmol/m2 s). The dry matter content in tomato fruits increased by 8-10%, while the number of fruits per plant increased by 42% compared to HPS and by 21% compared to led irradiation without the use of additional long - range red. The content of monosaccharides in tomato fruits 'T-34' F1 in the variant with the use of additional long-range red is 20% higher compared to HPS, and 2 times higher than this indicator compared to LED without the use of additional long-range red irradiation. The use of additional long-range red radiation improves the appearance and nutritional value of tomato fruits.

Relevance. Currently, in many countries of the world, the production of non-season raspberry berry products has become widespread. Recently, interest in this technology has arisen in Russia, which has great prospects for the development of industrial gardening. In our opinion, it is promising to develop elements of technology for the non-seasonal production of red raspberries, propagated by the method of clonal micropropagation with a traditional and remontant type of fruiting in the conditions of winter heated greenhouses.Material and methods. The experiments were carried out in the laboratory of clonal micropropagation of garden plants in the fruit growing laboratory of RGAU-MSHA named after K.A. Timiryazev. The objects of research were varieties of red raspberries with a traditional (variety Volnitsa) and remontant (varieties Orangevoe Chudo and Bryanskoe Divo) type of fruiting. The experimental plants were propagated by the method of clonal micropropagation and grown before distillation in open and protected ground; plants propagated by root offspring served as control. Experimental plants were planted in open ground for growing in mid-May, in mid-October they were transplanted into 10 liter containers and transferred to protected ground conditions. Then put in the refrigerator compartment with a temperature of + 1 ... + 5°C. For distillation, the raspberry repairing plants were exposed in the winter heated greenhouse on January 20, while the shoots of replacing the aboveground system were normalized: without normalization, 3 shoots per plant, complete pruning of the aboveground system. Raspberries with a traditional type of fruiting were exposed in a winter heated greenhouse in three periods on January 20, February 10, March 2. Accounting for the passage of the phenological phases of development and yield was made for 3 months every 5 days.Results. In the conditions of winter heated greenhouses, efficiency has been shown and elements of technology for non-season production of raspberry berries remontant and berries with a traditional type of fruiting, propagated in vitro and grown before open field distillation are developed. It was revealed that it is necessary to normalize the shoots before distillation of raspberry remontant, and the optimal timing for the start of distillation for raspberries with a traditional type of fruiting has been established.