Variability of the Gender Spectrum in Origanum vulgare L. (Lamiaceae, Magnoliopsida)

Autor:	N. I. Gordeeva, E. K. Komarevtseva
Rok vydání:	2020
Předmět:	0106 biological sciences 0301 basic medicine education.field_of_study ved/biology fungi Population ved/biology.organism_classification_rank.species food and beverages Origanum Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Shrub General Biochemistry Genetics and Molecular Biology 03 medical and health sciences 030104 developmental biology Holarctic Magnoliopsida Shoot Botany Lamiaceae General Agricultural and Biological Sciences education Transect
Zdroj:	Biology Bulletin. 47:1277-1280
ISSN:	1608-3059 1062-3590
DOI:	10.1134/s1062359020100076
Popis:	Origanum vulgare L. is a gynodioecious species, populations of which include hermaphroditic plants with bisexual flowers and female plants with pistillate flowers. This is a holarctic forest–steppe species belonging to herbaceous perennial plants. The variability of the female-to-hermaphrodite ratio in 26 coenopopulations of O. vulgare from different habitats has been studied. The data on eight populations were obtained in the course of the authors’ studies in southern Siberia, while 18 populations from Eastern Europe were analyzed based on the published data of other researchers. For all habitats, the projective cover of the species was determined according to the standard geobotanical methods. The plants studied represented a long-rhizome life form, so a partial shoot or a partial shrub (ramets) was used as a countable unit. The gender structure of coenopopulations was studied by counting generative plants within transects with an area of 10 to 20 m2. For each population, the total number of plants to be counted was at least 90. A significant positive correlation between the projective cover of O. vulgare in a phytocenosis and the percentage of female plants in coenopopulations was revealed (the Pearson correlation coefficient r = 0.86, p = 0.001). The ANOVA analysis showed no significant difference in the percentage of female plants in six different habitats (Femp = 3.36; Fcrit 5.5 = 5.1; p = 0.05). Taking into account the morphological and reproductive features of different genders of O. vulgare, one can suggest that an increase in the projective cover of the species in a phytocoenosis and an increase in the percentage of female plants in the gender spectrum depend on successful seed regeneration in the phytocenosis.
Databáze:	OpenAIRE
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