INTRODUCTION OF Sorbocotoneaster pozdnjakovii Pojark. IN THE PETER THE GREAT BOTANICAL GARDEN
A. V. Volchanskaya, G. A. Firsov, K. G. Tkachenko
Komarov Botanical Institute, Russian Academy of Sciences, Saint-Petersburg, Russian Federation
Keywords: Pozdnyakov’s mountain ash, plant introduction, fruits, seed quality and germination, radiography, Saint-Petersburg
Abstract
Pozdnyakov’s mountain ash Sorbocotoneaster pozdnjakovii Pojark. is a hybrid genus with a single species that arose from spontaneous hybridization of Cotoneaster melanocarpa Lodd. × rowan Sorbus sibirica Hedl. (Rosaceae), endemic to the flora of Russia. In the Peter the Great Botanical Garden Botanical Institute of the Russian Academy of Sciences it is known since 1953, from locus classicus of the natural provenance. The seed reproduction of the second generation was obtained for the first time in 2010. The germination ability was low 4-14 %. In natural conditions the species grows in sharply continental climate. There are cases of the rotting of plants soaking and destruction of plants from Phytophthora in the Saint-Petersburg’s the Peter the Great Botanical Garden at the end of the 1980’s. Under conditions of noticeable climate warming, it is necessary to do uninterrupted phenological observations, monitor the disease resistance, to develop agrotechnical cultivation maps.
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