Abstract
Presents the results of a comparative morphological analysis of the variability of 9 quantitative and quali-tative characteristics of the leaf (length, width and index of the leaf, the number (or number of pairs) of leaf lobes, length, width and index of the lateral leaf lobe, the number of denticles along the edge of the leaf lobe, leaves in a sample with entire and toothed edges of the leaf blade) of closely related species Va-leriana officinalis L. and V. alternifolia (Bunge) Ledeb. Samples of 7 cenopopulations of V. officinalis (South Urals) and 5 cenopopulations of V. alternifolia (Central Yakutia) served as the material for the analysis. In both species, the levels of variability of morphological traits of the leaf are not lower than the average, predominantly increased, the least variable trait is the number of pairs of leaf lobes. In the sam-ple of V. alternifolia, the prevailing frequency of occurrence of leaves with a certain number of leaf lobes is not expressed; most values fall within a wide range from 11 to 17 pcs. (5-8 pairs) leaf lobes; in the sample of V. officinalis, there is a pronounced peak in the number of leaf lobes equal to 16 pcs. (8 pairs), most of the leaves fall in the range from 14 to 18 pcs. (7-9 pairs) leaf lobes. Valeriana alternifolia is characterized by relatively small leaves with 5-8 pairs of narrow lobes, mostly whole-edged. Valeriana officinalis is characterized by relatively large and elongated leaves with 7-9 pairs of relatively wide lobes with several denticles along the edge. To differentiate closely related species, the following quantitative morphological characteristics of a leaf can be reliably used: length, width and index, number of leaf lobes, length, width and leaf lobe index.
Highlights
Приведены результаты сравнительного морфологического анализа изменчивости 9 количественных и качественных признаков листа близкородственных видов Valeriana officinalis L. и V. alternifolia (Bunge) Ledeb
The levels of variability of morphological traits of the leaf are not lower than the average, predominantly increased, the least variable trait is the number of pairs of leaf lobes
In the sample of V. alternifolia, the prevailing frequency of occurrence of leaves with a certain number of leaf lobes is not expressed; most values fall within a wide range from 11 to 17 pcs. (5-8 pairs) leaf lobes; in the sample of V. officinalis, there is a pronounced peak in the number of leaf lobes equal to 16 pcs. (8 pairs), most of the leaves fall in the range from 14 to 18 pcs. (7-9 pairs) leaf lobes
Summary
Объектами исследования являлись Valeriana officinalis и V. alternifolia. Valeriana officinalis характеризуется среднеевропейским типом ареала. Valeriana alternifolia встречается на пойменных лугах порядка Hordeetalia brevisubulati Kononov in Kononov et al 1986 класса Hordeetea brevisubulati Mirkin 1986 (с такими видами, как Sanguisorba officinalis, Thalictrum simplex, Bromopsis inermis, Veronica longifolia, Galium verum и др.) и на остепненных лугах и опушках, относимых к мезофильным степям порядка Festucetalia lenensis Mirkin in Gogoleva et al 1987 класса Cleistogine tea squarrosae Mirkin et al 1986 (в сообществах с Pulsatilla flavescens, Carex pediformis, Galium verum, Agrostis trinii, Dianthus versicolor и др.) [Ишмуратова и др., 2017]. Материалом для исследования послужили первые черешковые листья срединной формации вегетативно-репродуктивного побега, собранные с генеративных растений при проведении популяционных исследований в районах Республики Башкортостан (Южный Урал, 7 ценопопуляций) (V. officinalis) и в Центральной Якутии (Республика Саха, 5 ценопопуляций) (V. alternifolia). В анализ вовлечены две генеральные совокупности Valeriana officinalis (Южный Урал) и V. alternifolia (Центральная Якутия). Результаты измерения количественных морфологических признаков листа Valeriana alternifolia и V. officinalis представлены в таблице. В зависимости от ценопопуляций, у V. alternifolia доля листа может быть различной – узкой и относительно широкой (рис. 2), встречаются формы листа, морфологически близкие к V. officinalis
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