Morphology and quality of seeds of species of the genus Coreopsis L. of the Nikitsky Botanical Gardens’ collections

A morphological and biological description of 5 studied species of the genus Coreopsis L. (C. basalis (A. Dietr.) S.F. Blake, C. grandiflora Hogg. Ex Sweet., C. lanceolata L., C. longipes Hook., C. tripteris L) is given presented in the collection of the Nikitsky Botanical Garden. Under the conditions of introduction to the South Coast, coreopsis go through a full cycle of growth and development, bloom and bear fruit. The paper presents a morphometric description of seeds, as well as studied the germination and germination energy of seeds of species in laboratory conditions and in open ground conditions. It was revealed that the indicators of seeds of the third and fourth years of storage are reduced by more than two times in all species germinated in laboratory conditions, with the exception of C. basalis, the germination rate of seeds of which harvested in 2019 is 92%. Seeds of C. tripteris collected in 2019 and seeds of all the studied species collected in 2018 did not germinate in laboratory conditions and in open ground conditions. It has been established that the seeds of the studied species of coreopsis harvested in 2021 are characterized by the highest rates of seed germination energy in open ground conditions, especially in C. tripteris, whose seed germination energy in 2021 was 90%, compared to 2019, 2020 and 2022 collection, sown also in open ground, the indicators of which are lower. The obtained results allow us to draw a conclusion about the maximum and optimal period of storage of seeds of species of the genus Coreopsis L. in a seed bank for three to four years and at a temperature of +22-+25ºС.

1. Artyushenko Z.T., Fedorov A.A., Kirpichnikov M.E. Atlas on descriptive morphology of higher plants: Seed: atlas. Vol. 6. Leningrad.: Nauka, 1990. 204 p.

2. Boyko E.V. Trichomes of achenes of Asteraceae species. II glandular trichomes // Turczaninowia. 2012. 15(2):85-95

3. Bukin V.P., Bukin A.V., Bukina-Khrunyk A.V. Scientific bases of introduction of dye plants of the South of Ukraine. K.: PP "RK Master-print", 2008. p. 226.

4. Belyaeva T.N., Moseychuk E.A. Plant species with antimicrobial properties, promising for landscaping // Questions of the geography of Siberia. 2003. 192-194

5. Gavrichenko Yu.Yu., Shevchuk O.M., Katsev A.M. Biotesting of water and water-alcohol extracts of Coreopsis grandiflora Hogg. eh. Sweet. with the use of luminous bacteria // Modern problems of pharmacognosy. 2019. 68-72

6. GOST 12038-84 "Seeds of agricultural crops". Methods for determining germination. Standard of forms, 2011. 264 p.

7. GOST 9673-61 Seeds and planting material of agricultural crops. Moscow: Publishing House of Standards, 1973. 41 p.

8. GOST 34221-2017 Seeds of medicinal and aromatic crops. Varietal and sowing qualities. Moscow: Standartinform, 2020. 21 p.

9. Isaenko T.N. Sparsely distributed flower perennials, their use in culture // Agricultural Journal. 2020. 3(13):29-35

10. Kozhevnikov V.I., Bardakova S.A., Grechushkina-Sukhorukova L.A., Seliverstova E.N., Zheltopuzov V.N. Introduction work in the Stavropol Botanical Garden // Bulletin of the Agroindustrial complex of Stavropol. 2013. 2(10):201-206

11. Kabanov A.V. Introduction of late blooming ornamental herbaceous perennials in the Main Botanical Garden of the Russian Academy of Sciences // Mat. XVIII International Scientific and Practical Conference "Problems of Botany of Southern Siberia and Mongolia". 2019. pp. 589-593

12. Lunina L.M. Self-seeding and naturalization of ornamental and perennial herbaceous plants of the world flora, and introduced in Belarus // The state and prospects of applied research in botanical gardens. Vilnius, September 18-19, 2001, P. 67-72

13. Marko N.V., Logvinenko L.A., Shevchuk O.M., Feskov S.A. Annotated catalog of aromatic and medicinal plants of the collection of the Nikitsky Botanical Garden / under the general editorship of Plugatar Yu.V, corr. memb. of the RAS. Simferopol: PH "Arial", 2018. 176 p.

14. Nigmatyanova S.E. Evaluation of ornamental perennial introducents in the conditions of the Southern Urals // Subtropical and decorative gardening. 2019. 69:58-63

15. Prikhodko S.A., Makogon I.V. Perennial flower-ornamental plants of the Asteraceae family in the collections of the Donetsk Botanical Garden // Industrial Botany. 2021. 21(4):61-71

16. Fomina T.I. Features of germination of seeds of ornamental perennials of the aster family (Asteraceae Dumort.) // Bulletin of the Altai State Agrarian University. 2016. 9(143):25-30

17. Khodakov G.V. Yellow food dye from inflorescences of plants of the genus Coreopsis L. // Plant resources. 2000. 36(1):86-90

18. Guo L., Zhang W., Li S., Ho C.T. Chemical and nutraceutical properties of Coreopsis tinctoria // Journal of functional foods. 2015. Vol. 13. P. 11-20.

19. Huang G.S., Wei Q., Ma S.Y., Wei L.B. A new okanin glycoside from flowers of Coreopsis tinctoria Nutt. // Biochimichal systematics end ecology. 2020. Vol. 92. P. 104-117.

20. Li My I., Song M.X., Wang B., Li W., Jiang X.L., Li H.M., Guo X., Wang H., Schi C.C.

21. Efects of light intensity and nitrogen deposition on ecophysiological characteristics of Coreopsis grandiflora // Journal of the Torrey Botanical Society. 2022. Vol. 149(1). Pp. 40- 54.