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Heteromorphism of stamens in monoclinous flowers of Tinantia erecta (Jacq.) Fenzl as an example of high variability of the androecium in the Commelinaceae family
Protoplasma ( IF 2.9 ) Pub Date : 2020-06-26 , DOI: 10.1007/s00709-020-01522-z
D Tchórzewska 1 , R Marciniec 1 , K Deryło 2 , K Winiarczyk 1
Affiliation  

Representatives of the family Commelinaceae are characterised by morphologically, anatomically, or functionally diverse stamens (common presence of staminodia), which produce diverse pollen grains. The heteromorphism of stamens noted in all Commelinaceae species is a particular example of the evolutionary modification of the androecium in entomophilous plants. The morphological, anatomical, and cytological analyses of the androecium as well as the analysis of the microsporogenesis process and the formation of the male gametophyte in Tinantia erecta (a species belonging to the family Commelinaceae) have demonstrated that the morphologically diverse stamens in this species do not differ anatomically. Furthermore, the process of microsporogenesis followed by gametogenesis occurring in the stamens yields pollen grains with the same morphology, cytology, and function. Therefore, despite the large morphological diversity of the androecium, all anthers in T. erecta produce male gametophytes that are identical in every respect, which is a unique feature in species from the Commelinaceae family. Additionally, T. erecta is capable of self-pollination; hence, it can be claimed that the species uses its entire reproductive potential to produce seeds and a next generation.

中文翻译:

以鸭跖草科雄蕊高度变异为例,Tinantia planta (Jacq.) Fenzl 单斜花雄蕊的异形性

鸭跖草科的代表以形态、解剖或功能上多样化的雄蕊(常见雄蕊)为特征,产生多样化的花粉粒。所有鸭跖草科物种中注意到的雄蕊异形性是昆虫植物雄蕊进化修饰的一个特殊例子。对雄蕊的形态学、解剖学和细胞学分析以及小孢子发生过程和雄配子体形成的分析表明,该物种的雄蕊形态多样化。解剖学上没有区别。此外,雄蕊中发生的小孢子发生和配子发生过程产生具有相同形态、细胞学和功能的花粉粒。因此,尽管雄蕊的形态多样性很大,但直立草的所有花药都产生在各方面都相同的雄配子体,这是鸭跖草科物种的独特特征。此外,直立毛茛能够自花授粉。因此,可以说该物种利用了其全部生殖潜力来产生种子和下一代。
更新日期:2020-06-26
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