Plant density influence on life history traits of a perennial herb in rocky outcrops, southeastern Brazil

IF 0.4 4区生物学 Q4 Agricultural and Biological Sciences

Iheringia Serie Botanica Pub Date : 2020-07-15 DOI:10.21826/2446-82312020v75e2020014

G. R. Demetrio, M. E. A. Barbosa, F. F. Coelho

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引用次数: 3

Abstract

Rocky outcrops support a great diversity of edaphic conditions and associated vegetation mosaics greatly determined by factors like local topography and micro-environment. The vegetation is grouped, and clonal plants may form patches with different densities. Densitydependent responses are an important component of organism’s life-histories. We evaluated the density effects on Vellozia albiflora traits. We settled 20 monospecific patches of V. albiflora with different densities and sampled vegetative and reproductive traits. We compared traits between plants experimenting densely crowded and uncrowded conditions. V. albiflora rosettes present larger sizes and higher production of sexual reproductive structures in high densities. We concluded that V. albiflora probably allocates more resources to sexual reproduction in response to high-density conditions, which may allow a higher survival of offspring, since seeds are able to endure in soil and germinate under better density conditions, whereas the propagules generated by asexual reproduction must establish right after their production.

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植物密度对巴西东南部露头岩中多年生草本植物生活史性状的影响

岩石露头支持多种多样的土壤条件和相关的植被马赛克，这在很大程度上取决于当地地形和微环境等因素。植被成组，无性系植物可形成不同密度的斑块。密度依赖性反应是生物生命史的重要组成部分。本研究评价了密度对白草粉虱性状的影响。对20个不同密度、不同营养性状和生殖性状的单特异斑地进行了取样。我们比较了植物在密集拥挤和非拥挤条件下的性状。在高密度的情况下，花楸的莲座花序具有较大的尺寸和较高的有性生殖结构产量。我们得出结论，在高密度条件下，白花紫花可能会将更多的资源分配给有性生殖，这可能会提高后代的存活率，因为种子能够在较好的密度条件下在土壤中存活并发芽，而无性繁殖产生的繁殖体必须在生产后立即建立。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Iheringia Serie Botanica PLANT SCIENCES-

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Iheringia, Série Botânica is a publication edited by the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, since 1958. The name Iheringia is actually a tribute to Hermann von Ihering (a German researcher who became a Brazilian citizen) and his important studies in the Natural Sciences.The journal has the mission of publishing articles, reviews and original scientific notes that cover diverse areas in Botany, and may be written in Portuguese, Spanish and English. The journal is widely available in both international and national scientific community. The issues are published and distributed twice a year to 118 national institutions and 152 international institutions. The distribution is either free of charge or by exchange. Impac Factor JCR 2014/2015 = 0.263 Qualis CAPES 2015: B 4 (Biodiversity) B1 (Agricultural Science I) B1 (Environment)