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RAS BiologyБотанический журнал Botanical Journal

  • ISSN (Print) 0006-8136
  • ISSN (Online) 2658-6339

GYNODIOECY OF LOMELOSIA SONGARICA (CAPRIFOLIACEAE) IN TAJIKISTAN

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PII
S26586339S0006813625050039-1
DOI
10.7868/S2658633925050039
Publication type
Article
Status
Published
Authors
V. N. Godin
  • Affiliation: Central Siberian Botanical Garden SB RAS
A.Y. Astashenkov
  • Affiliation: Central Siberian Botanical Garden SB RAS
V.A. Cheryomushkina
  • Affiliation: Central Siberian Botanical Garden SB RAS
K.A. Bobokalonov
  • Affiliation: Institute of Botany, Physiology and Genetics of Plants, National Academy of Sciences of Tajikistan
Volume/ Edition
Volume 110 / Issue number 5
Pages
460-474
Abstract
Gynodioecy in the herbaceous polycarpic plant, Lomelosia songarica, from Tajikistan was identified and is described here for the first time. Three populations were studied in 2022. The plants produce flowers of two types, bisexual and pistillate, occurring on individuals of three different variants: hermaphrodite (bisexual flowers only), female (pistillate flowers only), and gynomonoccious (bisexual and pistillate flowers). The marginal flowers in floral units are irregular (transversely zygomorphic), the median ones are almost regular (actinomorphic). Two types of bisexual flowers have been identified, differing in the degree of androecium development: 1) all four stamens are fertile and produce viable pollen; 2) partially androsterile, i.e., one, two, or three stamens are sterile due to incompletely developed pollen, in this case the anthers remain closed. In pistillate flowers, rudiments of the androecium are preserved, represented by staminodes which produce no pollen. Bisexual flowers are larger than pistillate ones by most of the studied parameters. There are two types of L. songarica populations: monomorphic (consisting only of hermaphrodite individuals) and heteromorphic (gynodioecious). In the gynodioecious population, the frequency of hermaphrodite, female and gynomonoccious individuals was subequal (33.3%). The article addresses the adaptive significance of the gynomonoccious individuals of this species serving as an alternative to strictly female individuals in light of the presence of exclusively cross-pollination due to strict intra- and interfacial protandry and synchronicity of flowering of the floral units within synflorescences.
Keywords
гинодиэция гиномоноэция Lomelosia songarica Таджикистан половой спектр
Date of publication
08.04.2025
Year of publication
2025
Number of purchasers
0
Views
19

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