叠瓦唐菖蒲和西伯利亚鸢尾(鸢尾科)授粉过程的特征

K. Skrypec, L. Tasenkevich
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引用次数: 0

摘要

介绍了乌克兰植物区系的两个濒危物种——叠瓦唐菖蒲和西伯利亚鸢尾(鸢尾科)的自花授粉研究结果。为了证实或反驳叠瓦草和西伯利亚小檗自花授粉的发生,对其柱头上的花粉萌发进行了实验。研究发现,在叠瓦菜中,无论是人工授粉还是自然授粉,在开花的最后一天用自体花粉粒授粉都会导致花粉管的生长。然而,在开花的第一天或最后一天,没有在分离的西伯利亚花的柱头上检测到花粉粒,这意味着在复兰中缺乏自主花粉转移机制。自花授粉后,柱头上也有未发芽的花粉粒。实验已经证实,在叠瓦藻和该属其他一些成员开花末期没有传粉昆虫的情况下,自授粉和自受精是可能的,这有助于种群和物种的健康。关于西伯利亚I.sibirica,已经发现该物种固有的自交不亲和性防止了近亲繁殖,保持了植物种群的杂合性,使植物更好地适应不同的环境条件。
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Traits of the pollination process in Gladiolus imbricatus and Iris sibirica (Iridaceae)
Results of a study of self-pollination in two of Ukrainian flora's threatened species, Gladiolus imbricatus and Iris sibirica (Iridaceae), are presented. To confirm or refute the occurrence of self-pollination in G. imbricatus and I. sibirica, an experiment was conducted on pollen germination on their stigmas. It has been found that in G. imbricatus pollination with autogenous pollen grains on the last day of flowering leads to the growth of pollen tubes in the cases of both hand and natural pollination. However, pollen grains on the stigma of an isolated I. sibirica flower were not detected on the first or last day of flowering, which means the absence of a mechanism of autonomous pollen transfer within the meranthium. Ungerminated pollen grains were also found on the stigma after autogenous hand pollination. It has been experimentally confirmed that in the absence of pollinators at the end of the flowering phase in G. imbricatus, as well as in some other members of the genus, self-pollination and self-fertilization are possible, which contribute to the wellbeing of populations and species. With regard to I. sibirica, it has been found that the autogamous self-incompatibility inherent in this species prevents inbreeding, maintaining heterozygosity in plant populations, allowing plants' better adaptation to different environmental conditions.
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来源期刊
CiteScore
0.80
自引率
0.00%
发文量
36
审稿时长
8 weeks
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