Page 174 - Zbornik_Konf_2019

https://doi.org/10.15414/2019.9788055220703

4 International Scientific Conference Abstracts Book
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LIFE FORMS OF BRASSICACEAE BURNETT SPECIES OF THE FLORA OF UKRAINE

Antonina Ilyinska
M.M. Gryshko National Botanical Garden of the National Academy of Sciences of Ukraine,
Kyiv, Ukraine; E-mail.: ilynska@ukr.net
Information on the life-forms of Brassicaceae Burnett species is incomplete and was
obtained by the authors at different times as the result of using different approaches,
principles, and characteristics. Specifically, the life forms of cruciferous flora of Ukraine have
not been studied.
The aim of this study was to determine the diversity of biotypes, life-forms, and
biomorphs of cruciferous of the flora of Ukraine according to the same scheme, and on the
basis of the same complex of characters.
The concept of morphological-geographical monotype standard of the species is used.
Objects of the study: 251 species from 74 genera of Brassicaceae family of the flora of Ukraine.
We used the results of the original field research, the materials of herbarium collections KW,
DNZ, JALT, LW, CWB, KWHA, LE, MW (Index Herbariorum http://sweetgum.nybg.org) and
literature data. The biotypes and the life-forms are described according to Raunkiaer
classifications (1934) and Serebryakov (1962), respectively. The biomorphs are defined
according to Serebryakov system-hierarchical principle (1962).
The resulting spectrum of Raunkiaer biotypes is as follows: therophytes (102 species,
40.6 %), hemicryptophytes (101 species, 40.2 %), chamaefites (33 species, 13.1 %), geophytes
(12 species, 4.8 %), helophytes (two species, 0.8 %) and hydrophytes (one species, 0.4 %).
Cruciferous life-forms (according to their duration) of the studied flora are fairly uniform:
monocarpic herbs (134 species, 53 %) and herbal polycarpic (83 species, 33 %) dominate,
there are few small subshrubs (33 species, 13 %) and very few amphibious and floating herbs
(only Nasturtium officinale WT Aiton, Rorippa amphibia (L.) Besser and Subularia aquatica L.
(problematic species of Ukrainian flora), respectively). According to the system-hierarchical
classification developed by us, the range of cruciferous biomorph diversity is wider compared
to such of the biotypes and of the life-forms and divided between 2 divisions, 3 types, 4
classes, 5 subclasses, 4 groups, and 6 sections. Among the studied crucifers there are very
much monopodial monocarpics with semi-rosette shoots and taproot (71 species from 39
genera, including Rapistrum Scop., Chorispora R.Br. ex DC., Camelina Crantz, etc.). Much less is
there monopodial monocarpics with semi-rosette shoots and caudex (28 species of 10 genera,
including Arabidopsis Heynh., Isatis L., Raphanus L. etc.) or with elongated shoots and taproot
(22 species of 9 genera including Lepidium L., Meniocus Desv., Erysimum L. etc.).
Our results show that life-forms cruciferous of the flora of Ukraine are a reflection of the
adaptation of the primary family types to the conditions of the temperate continental climate,
including changes to moisture supply and temperature range and to the man-made
environmental change. Mostly they represent the xero-cryophilic evolutionary line of
development of the ancestral types of the family.
Keywords: Brassicaceae, biotypes, life-forms, biomorphs, flora of Ukraine.

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September 11–13, 2019