Abstract

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 (F_emp = 3.36; F_crit 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.

中文翻译：

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牛至属植物（茄科，木兰科）中性别光谱的变异性

摘要

牛至属植物是雌雄同体的物种，其种群包括具有两性花的雌雄同体植物和具有雌蕊花的雌性植物。这是一种属于多年生草本植物的幽灵森林-草原物种。阴到雌雄同体比的在26个coenopopulations变异O.大麦来自不同栖息地的研究。作者在西伯利亚南部的研究过程中获得了8个种群的数据，而东欧的18个种群的数据是根据其他研究人员的已发表数据进行了分析。对于所有生境，根据标准的植物学方法确定了该物种的射影覆盖度。所研究的植物代表了根茎的长寿形式，因此将部分枝条或部分灌木（分株）用作可数单位。通过计数面积在10至20 m ^2的样带内的生殖植物，研究了共生种群的性别结构。对于每个种群，要计数的植物总数至少为90。低俗O.vulgare的射影覆盖率之间存在显着的正相关。揭示了植物群落中的雌雄异体和雌雄同体种群的百分比（皮尔森相关系数r = 0.86，p = 0.001）。方差分析表明，在六个不同的生境中雌性植物的百分比没有显着差异（F _emp = 3.36；F _{crit 5.5} = 5.1；p = 0.05）。考虑到不同性别的O. vulgare的形态和生殖特征，可以认为在植物群落中该物种的投射覆盖率的增加以及在性别谱中雌性植物百分比的增加都取决于成功的种子再生在植物菌病中。