Clonal integration facilitates the expansion of Hydrocotyle vulgaris from a limited space to a larger area

IF 1.1 4区 生物学 Q4 ECOLOGY Plant Species Biology Pub Date : 2024-07-02 DOI:10.1111/1442-1984.12478
Bing‐Nan Zhao, Zhi‐Huan Chen, Zhi‐Hang Liu, Xue‐Ge He, Zi‐Qi Chen, Xin‐Yue Gu, Chao Si
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Abstract

Clonal integration is an important ecological advantage of clonal plants. To ask whether clonal integration can help invasive plants escape space limitations, we tested the hypothesis that it can promote the growth of apical ramets when their connected basal ramets grow in limited space. We conducted a greenhouse experiment on the common perennial herb Hydrocotyle vulgaris. Clonal fragments consisting of pairs of connected ramets grew with basal ramets in three different sizes of pots (small, medium, and large) and apical ramets in large pots, and the connection between ramets was either severed or left intact. Pot size significantly affected the growth of basal ramets such that the biomass, number of leaves and flowers, and stolon length were in general greater in medium pots than in large and small pots when stolons were intact and were greater in medium and large pots than in small pots when stolons were severed. Furthermore, pot size interacted with severance to affect the performance of H. vulgaris. When the basal ramets grew in small pots, the intact stolon resulted in a significant promotion of apical ramet growth, but such positive effect was not found when the basal ramets grew in medium and large pots. Our results suggest that H. vulgaris is able to promote the growth of apical ramets to occupy the surrounding areas through clonal integration when the space where basal ramets grow is limited.
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克隆整合有助于将 Hydrocotyle vulgaris 从有限的空间扩展到更大的区域
克隆整合是克隆植物的一个重要生态优势。为了探究克隆整合是否能帮助入侵植物摆脱空间限制,我们测试了这样一个假设:当顶端柱头与其相连的基部柱头在有限的空间内生长时,克隆整合能促进其生长。我们对常见的多年生草本植物 Hydrocotyle vulgaris 进行了温室实验。由一对对相连的柱头组成的克隆片段在三种不同大小的花盆(小、中、大)中生长基部柱头,在大花盆中生长顶端柱头,柱头之间的连接要么被切断,要么保持不变。花盆大小对基部匍匐茎的生长有明显影响,在匍匐茎完好无损的情况下,中型花盆的生物量、叶片和花的数量以及匍匐茎的长度一般大于大型和小型花盆,而在匍匐茎被切断的情况下,中型和大型花盆的生物量、叶片和花的数量以及匍匐茎的长度一般大于小型花盆。此外,花盆的大小与匍匐茎的切断程度相互影响,从而影响匍匐茎的生长表现。当基部柱头生长在小花盆中时,完整的匍匐茎能显著促进顶端柱头的生长,但当基部柱头生长在中型和大型花盆中时,则没有发现这种积极作用。我们的研究结果表明,当基生匍匐茎的生长空间有限时,粗壮匍匐茎能够通过克隆整合促进顶端匍匐茎的生长,从而占据周围区域。
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来源期刊
Plant Species Biology
Plant Species Biology 生物-生态学
CiteScore
2.70
自引率
14.30%
发文量
36
审稿时长
>12 weeks
期刊介绍: Plant Species Biology is published four times a year by The Society for the Study of Species Biology. Plant Species Biology publishes research manuscripts in the fields of population biology, pollination biology, evolutionary ecology, biosystematics, co-evolution, and any other related fields in biology. In addition to full length papers, the journal also includes short research papers as notes and comments. Invited articles may be accepted or occasion at the request of the Editorial Board. Manuscripts should contain new results of empirical and/or theoretical investigations concerning facts, processes, mechanisms or concepts of evolutionary as well as biological phenomena. Papers that are purely descriptive are not suitable for this journal. Notes & comments of the following contents will not be accepted for publication: Development of DNA markers. The journal is introducing ''Life history monographs of Japanese plant species''. The journal is dedicated to minimizing the time between submission, review and publication and to providing a high quality forum for original research in Plant Species Biology.
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