Stem cutting rhizogenesis in soſtwood graſting of Philadelphus coronarius L. f. aureus nanus

Sweet mock orange f. golden dwarf (Philadelphus coronarius L. f. aureus nanus) is a promising ornamental shrub in green building within Central Russia. In the Orel Region, this species has a limited occurrence due to the lack of quality planting material, which warrants research into rhizogenesis of P. coronarius f. aureus nanus stem cuttings during soſtwood graſting. Trials were conducted during 2017-2019 in triplicate, 20 cuttings each, adhering to the common woody plant soſtwood graſting propagation technique. Two yearling types were used, side shoots and innovations. Experimental setups: 1 — control (water); 2 — aqueous indolebutyric acid (IBA) 50 mg/L at 18-h exposure; 3 — bottom cutting powdering with 0.5 g/kg active coal-IBA mixture; 4 — bottom cutting treatment with 50 mg/L IBA at 18-h exposure followed by powdering with 0.5 g/kg active coal-IBA mixture. Setup 2 (IBA 50 mg/L) rendered the highest positive effect on the rooting and reproduction of side shoot and innovation-derived stem cuttings. Te best cutting root system biometry (number and length of 1st order roots) was obtained in setup 2 with the innovation cuttings (10.50 roots of 4.53 cm) compared to the side-shoot ones (9.81 roots of 3.68 cm).

1. Kuklina A. G. Dekorative flowering shrubs (Forsythia Vahl., Weigela Tunb., Philadelphus L., Deutzia Tunb.). Moscow: Izd. Dom MSP, 2007, 64 p. (In Russ.)

2. Cherepanov S. K. Vascular plants of Russia and neighboring States (within the former USSR). St.-Petersburg: Mir i sem’ya, 1995, 992 p. (In Russ.)

3. Kolesnikov A. I. Decorative dendrology. Moscow: lesnaya promyshlennosti, 1974, 703 p. (In Russ.)

4. Kazarova S. Yu., Boyko G. A. Introduction of hybrids and varieties of the genus Philadelphus L. in the collection of Botanical garden of Moscow State University. Subtropicheskoye i decorativnoye sadovodstvo. 2012;47(2):54-60. (In Russ.)

5. Okuneva I. B. Flowering shrubs: Syringa L., Philadelphus L., Forsythia Vahl., Spiraea L., Rosa L. Moscow: ZAO Fiton +, 2009, 64 p. (In Russ.)

6. Khanbabayeva O. E. Prospects and directions of using Philadelphus L. in gardening and landscaping. Vestnik landshaſtnoi arkhitectury. 2016;8:99-102. (In Russ.)

7. Ketner I. A. Structure and significance of the Russian market of ornamental plants in the assortment section of nurseries. Vektor nauki Tol’yattinskogo gosudarstvennogo universiteta. Seriya: Ekonomika i upravleniye. 2013;1(12):66-69. (In Russ.)

8. Faustov V. V. Regeneration and vegetative propagation of garden plants. Izvestiya Timiryazevskoy sel’skokhozyaystvennoy akademii. 1987;6:137-160. (In Russ.)

9. Tarasenko M. T. Soſt-wood cuttings of garden and forest crops. Moscow: MSKHА, 1991, 272 p. (In Russ.)

10. Khaylova O. V., Denisov N. I. Dependence of the results of soſtwood cutting on morphological features of woody plant. Vestnik Voronezhskogo gosudarstvennogo agrarnogo universiteta. 2013;2(37):223-228. (In Russ.)

11. Ostrikova O. V. Researches of adaptability and reproductivity of valuable ornamental plants potential. Uchenyye zapiski Orlovskogo gosudarstvennogo universiteta. Seriya: Yestestvennyye, tekhnicheskiye i meditsinskiye nauki. 2010;2:274-279. (In Russ.)

12. Mukhametova S. V., Sukhareva L. V., Panfilova M. I. Vegetative propagation of Philadelphus varieties. Mezhdunarodnyy zhurnal gumanitarnykh i yestestvennykh nauk. 2018;10(1):154-156. (In Russ.) DOI: 10.24411/2500-1000-2018-10085.

13. Grekova I. V., Chukuridy S. S. Effect of growth regulators on rooting cuttings of Philadelphus (Philadelphus L., Phila-delphaceae). Politematicheskiy setevoy elektronnyy nauchnyy zhurnal Kubanskogo gosudarstvennogo agrarnogo universiteta. 2015;105:899-909. (In Russ.)

14. Vyugin S. M., Vyugina U. V. Use of synthetic analogues of plant hormones at propagation of the ornamental shrubs by soſtwood cutting. Zashchita i karantin rasteniy. 2016;10:47-48. (In Russ.)

15. Shakina T. N. Peculiarities of reproduction of ornamental shrubs by cuttings in the conditions of the Saratov city. Problemy botaniki Yuzhnoy Sibiri i Mongolii. 2017;16:327-331. (In Russ.)

16. Dunaeva E. N., Dunaev A. V. Improvement of methods of vegetative propagation and reproduction of ornamental deciduous shrubs from the collection of the Botanical garden of the Belgorod State University. Polevoy zhurnal biologa. 2020;2(1):60-66. (In Russ.) DOI: 10.18413/2658-3453-2020-2-60-66.

17. Nelovko A. A. Vegetative reproduction of species of the genus Philadelphus L. by semi-woody cuttings. Byulleten' botanicheskogo sada Saratovskogo gosudarstvennogo universiteta. 2007;6:72-75. (In Russ.)

18. Skorbach V. V., Kostenko A. Yu. Influence of the timing of cuttings on the rooting capacity of cuttings of woody plants in the conditions of the Chernozem region. Intellektual‘nyy potentsial XXI veka: stupeni poznaniya. 2016;34:11-20. (In Russ.)

19. Klementieva L. A. Peculiarities of green cuttings of Philadelphus in the conditions of moderately arid and peck steppe of the Altai territory. In book: Ornamental gardening of Siberia: problems and prospects, Barnaul, 2010, p. 180-183. (In Russ.)

20. Mineeva L. Yu. Influence of growth stimulants on the degree of rooting of some types of ornamental shrubs. Vestnik Ivanovskogo gosudarstvennogo universiteta. 2003;3:13-18. (In Russ.)

21. Pavlenkova G. A. Ecological and biological assessment of the Hydrangeaceae Dumort. family representatives from the VNIISPK arboretum collection. Contemporary horticulture. 2017;4(24):131-139. (In Russ.) URL: http://journal-vniispk.ru/pdf/2017/4/45.pdf

22. Pavlenkova G. A. Prospects of introduction of Philadelphus L. genus representatives in conditions of Orel region. In book: Prospects for medicinal plant growing. Moscow, 2018: p. 212-217. (In Russ.)

23. Pavlenkova G. A., Emelyanova O. Yu. Assessment of the reproductive potential of Philadelphus coronarius L. f. aureus nanus by soſt-wood cuttings. Vestnik Kurskoy gosudarstvennoy sel’skokhozyaystvennoy akademii. 2019;9:73-76. (In Russ.)

24. Dubovitskaya O. Yu., Pavlenkova G. A. Arboretum of the Russian Research Institute of Fruit Crop Breeding. A short guide. Orel: VNIISPK, 2015, 64 p. (In Russ.)

25. Dospekhov B. A. Te methodology of field experience (with the basics of statistical processing of research results). Moscow: Kolos, 2012, 352 p. (In Russ.)