继承风:香柏科植物生殖特征的进化

IF 2.3 2区 生物学 Q2 PLANT SCIENCES
Ana Luisa Arantes Chaves, Ana Carolina Galindo da Costa, Isabel Cristina Machado, Rosemeri Morokawa, William Wayt Thomas, Suzana Maria Costa
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引用次数: 0

摘要

有关被子植物生殖方面的研究很少涉及草本植物和嗜风植物类群。桧柏科植物是世界性植物,在性状、花序结构和传粉方式(如嗜风、嗜虫和嗜伏)方面具有多样性。因此,生殖性状的进化可以澄清被子植物生殖生物学的一些问题,尤其是生物授粉和非生物授粉之间的过渡。本研究旨在通过系统进化比较方法,如重建祖先状态和进化相关性,研究香柏科植物生殖性状的进化。如果马盘树科(Mapanioideae)中的穗状花序确实是花序,那么桧柏科(Cyperaceae)中的两性花将由此而来,这在被子植物中是罕见的。在香柏科中,观察到花的数量减少,雄蕊脱落事件增加。这一结果与嗜风物种生殖结构增加的假设相矛盾,在嗜风物种中,会产生更多的花粉来补偿风产生的废物。只发现了一种相关性:花序分枝数与每个花序的生殖单位数之间存在相关性。最后,分析结果表明,香柏科植物的生殖生物学具有很大的多样性,显然有必要扩大理论研究,以完善相关性状的发现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Inherit the wind: evolution of reproductive traits in Cyperaceae
Studies about reproductive aspects of angiosperms rarely refer to herbaceous and anemophilous groups. Cyperaceae are cosmopolitan and diverse in terms of sexuality, inflorescence architecture, and pollination modes, such as anemophily, entomophily, and ambophily. Therefore, the evolution of reproductive traits can clarify some questions about the reproductive biology of angiosperms, especially regarding the transitions between biotic and abiotic pollination. This study was designed to investigate the evolution of reproductive traits in Cyperaceae through comparative phylogenetic methods, such as reconstruction of ancestral states and evolutionary correlation. If spicoids in Mapanioideae are indeed inflorescences, the bisexual flower in Cyperaceae would be derived, a rare case in angiosperms. In Cyperoideae, a decrease in the number of flowers and an increase in stamen loss events were observed. This result contradicts the hypothesized increase in reproductive structures in anemophilous species, in which a greater amount of pollen is produced to compensate for the waste generated by wind. Only one correlation was found: between the number of inflorescence branches and the number of reproductive units per inflorescence. Finally, the analyses showed the great diversity of reproductive biology in Cyperaceae and made evident the need to expand the theoretical studies to refine the discovery of correlated traits.
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来源期刊
CiteScore
5.70
自引率
8.30%
发文量
54
审稿时长
3.5 months
期刊介绍: The Botanical Journal of the Linnean Society publishes original papers on systematic and evolutionary botany and comparative studies of both living and fossil plants. Review papers are also welcomed which integrate fields such as cytology, morphogenesis, palynology and phytochemistry into a taxonomic framework. The Journal will only publish new taxa in exceptional circumstances or as part of larger monographic or phylogenetic revisions.
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