PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG
Pyrus zangezura Maleev (Rosaceae) is a rare species representing the native vegetation of Armenia (Southern Transcaucasus). It was first described in 1936. P. zangezura has been cultivated at the Peter the Great Botanical Garden of the Komarov Botanical Institute (St. Petersburg, Russia) since 1949,...
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| Format: | Article |
| Language: | English |
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N.I. Vavilov All-Russian Institute of Plant Genetic Resources
2019-10-01
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| Series: | Труды по прикладной ботанике, генетике и селекции |
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| Online Access: | https://elpub.vir.nw.ru/jour/article/view/412 |
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| author | K. G. Tkachenko G. A. Firsov L. F. Yandovka A. V. Volchanskaya N. E. Staroverov Yu. A. Gryaznov |
| author_facet | K. G. Tkachenko G. A. Firsov L. F. Yandovka A. V. Volchanskaya N. E. Staroverov Yu. A. Gryaznov |
| author_sort | K. G. Tkachenko |
| collection | DOAJ |
| description | Pyrus zangezura Maleev (Rosaceae) is a rare species representing the native vegetation of Armenia (Southern Transcaucasus). It was first described in 1936. P. zangezura has been cultivated at the Peter the Great Botanical Garden of the Komarov Botanical Institute (St. Petersburg, Russia) since 1949, where it has reached the height of 8,0 m. For many years, it was in its vegetative state. The first flowering was observed in 2016 (the plant entered the reproductive state). The first progeny from seed was obtained in April 2019. Fruit size was assessed for P. zangezura plants in the dynamics of their development. The studied plants of P. zangezura in the environments of St. Petersburg have demonstrated a high fruiting potential – on average, 109 flowers per 1 m of a shoot. Observations have shown that not all ovules in the opened flowers of P. zangezura are fertilized and produce fruits and seeds. A significant part of the opened flowers, a few days after the onset of flowering, dry up and fall off. On average, 7 fruits are set on 1 m of the shoot in P. zangezura. The reasons for the low flower setting may be variable: impaired pollination processes and insufficient fertility of pollen, underdevelopment of the flower morphological structures, or lack of pollinating insects due to adverse weather conditions. An X-ray analysis of the seeds from the harvests of 2016, 2017 and 2018 showed that the number of plump and fully developed seeds (grades IV and V) in fruits has been growing year by year. As an ornamental plant, P. zangezura may adorn any botanical garden, but it is also promising for urban landscaping, for example, in St. Petersburg. Even in the vegetative state, its elongated lanceolate glossy leaves make it appreciably different from the common P. communis L., and it is especially ornamental during flowering and fruiting. It is as winter-hardy as the common pear-tree, demonstrates resistance to diseases and pests, and may be of importance for breeding programs aimed at the development of resistant cultivars for the Northwest of Russia. |
| format | Article |
| id | doaj-art-a5653b39fd194e25b8ab7280fd18e652 |
| institution | Kabale University |
| issn | 2227-8834 2619-0982 |
| language | English |
| publishDate | 2019-10-01 |
| publisher | N.I. Vavilov All-Russian Institute of Plant Genetic Resources |
| record_format | Article |
| series | Труды по прикладной ботанике, генетике и селекции |
| spelling | doaj-art-a5653b39fd194e25b8ab7280fd18e6522025-02-03T08:31:12ZengN.I. Vavilov All-Russian Institute of Plant Genetic ResourcesТруды по прикладной ботанике, генетике и селекции2227-88342619-09822019-10-011803121810.30901/2227-8834-2019-3-12-18364PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURGK. G. Tkachenko0G. A. Firsov1L. F. Yandovka2A. V. Volchanskaya3N. E. Staroverov4Yu. A. Gryaznov5Komarov Botanical Institute of the RASKomarov Botanical Institute of the RASHerzen State Pedagogical University of RussiaKomarov Botanical Institute of the RASSt. Petersburg State Electrotechnical University (LETI)St. Petersburg State Electrotechnical University (LETI)Pyrus zangezura Maleev (Rosaceae) is a rare species representing the native vegetation of Armenia (Southern Transcaucasus). It was first described in 1936. P. zangezura has been cultivated at the Peter the Great Botanical Garden of the Komarov Botanical Institute (St. Petersburg, Russia) since 1949, where it has reached the height of 8,0 m. For many years, it was in its vegetative state. The first flowering was observed in 2016 (the plant entered the reproductive state). The first progeny from seed was obtained in April 2019. Fruit size was assessed for P. zangezura plants in the dynamics of their development. The studied plants of P. zangezura in the environments of St. Petersburg have demonstrated a high fruiting potential – on average, 109 flowers per 1 m of a shoot. Observations have shown that not all ovules in the opened flowers of P. zangezura are fertilized and produce fruits and seeds. A significant part of the opened flowers, a few days after the onset of flowering, dry up and fall off. On average, 7 fruits are set on 1 m of the shoot in P. zangezura. The reasons for the low flower setting may be variable: impaired pollination processes and insufficient fertility of pollen, underdevelopment of the flower morphological structures, or lack of pollinating insects due to adverse weather conditions. An X-ray analysis of the seeds from the harvests of 2016, 2017 and 2018 showed that the number of plump and fully developed seeds (grades IV and V) in fruits has been growing year by year. As an ornamental plant, P. zangezura may adorn any botanical garden, but it is also promising for urban landscaping, for example, in St. Petersburg. Even in the vegetative state, its elongated lanceolate glossy leaves make it appreciably different from the common P. communis L., and it is especially ornamental during flowering and fruiting. It is as winter-hardy as the common pear-tree, demonstrates resistance to diseases and pests, and may be of importance for breeding programs aimed at the development of resistant cultivars for the Northwest of Russia.https://elpub.vir.nw.ru/jour/article/view/412pear-treearboriculturebiological featuresseed qualityx-ray analysispeter the great botanical garden |
| spellingShingle | K. G. Tkachenko G. A. Firsov L. F. Yandovka A. V. Volchanskaya N. E. Staroverov Yu. A. Gryaznov PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG Труды по прикладной ботанике, генетике и селекции pear-tree arboriculture biological features seed quality x-ray analysis peter the great botanical garden |
| title | PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG |
| title_full | PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG |
| title_fullStr | PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG |
| title_full_unstemmed | PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG |
| title_short | PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG |
| title_sort | pyrus zangezura rosaceae at saint petersburg |
| topic | pear-tree arboriculture biological features seed quality x-ray analysis peter the great botanical garden |
| url | https://elpub.vir.nw.ru/jour/article/view/412 |
| work_keys_str_mv | AT kgtkachenko pyruszangezurarosaceaeatsaintpetersburg AT gafirsov pyruszangezurarosaceaeatsaintpetersburg AT lfyandovka pyruszangezurarosaceaeatsaintpetersburg AT avvolchanskaya pyruszangezurarosaceaeatsaintpetersburg AT nestaroverov pyruszangezurarosaceaeatsaintpetersburg AT yuagryaznov pyruszangezurarosaceaeatsaintpetersburg |