海胆(Strongylocentrotus purpuratus)种群的形态和机械管脚可塑性。

IF 2.2 4区 生物学 Q2 BIOLOGY
Integrative Organismal Biology Pub Date : 2024-07-08 eCollection Date: 2024-01-01 DOI:10.1093/iob/obae022
C A Narvaez, A Y Stark, M P Russell
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引用次数: 0

摘要

海胆依靠其管足分泌的粘合剂来应对近岸高波能环境中常见的水动力脱落。管足可牢固地粘附在基质上,并在运动时自动分离。在紫海胆(Strongylocentrotus purpuratus)中,粘附性能取决于基质类型和原生种群,其中一些基质和种群比其他基质和种群更具粘附性。为了探索这种差异的根源,我们评估了原产于不同岩性底质(砂岩、泥岩和花岗岩)的种群的管足形态(盘表面积)和机械性能(最大盘韧性和茎干断裂力)。我们发现不同种群之间存在差异,原生于泥岩基质的海胆比原生于砂岩基质的海胆具有更高的盘表面积和最大盘韧性。在一项基于实验室的相互移植实验中,我们试图诱导管足形态的塑性反应。我们将海胆放置在非原生基质上(例如,将泥岩海胆放置在砂岩上,反之亦然),同时将两个种群中的一个亚群作为对照,保留在原生基质上。我们发现,在实验室条件下,包括对照组在内的所有处理都减少了海胆盘的面积,而不是形态上的相互反应。这项研究结果表明,不同种群在形态和机械性能上存在差异,这也解释了种群在粘附性能上的差异。此外,这项工作还强调了在解释实验室研究结果时考虑表型可塑性对圈养的影响的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Morphological and Mechanical Tube Feet Plasticity among Populations of Sea Urchin (Strongylocentrotus purpuratus).

Sea urchins rely on an adhesive secreted by their tube feet to cope with the hydrodynamic forces of dislodgement common in nearshore, high wave-energy environments. Tube feet adhere strongly to the substrate and detach voluntarily for locomotion. In the purple sea urchin, Strongylocentrotus purpuratus, adhesive performance depends on both the type of substrate and the population of origin, where some substrates and populations are more adhesive than others. To explore the source of this variation, we evaluated tube foot morphology (disc surface area) and mechanical properties (maximum disc tenacity and stem breaking force) of populations native to substrates with different lithologies: sandstone, mudstone, and granite. We found differences among populations, where sea urchins native to mudstone substrates had higher disc surface area and maximum disc tenacity than sea urchins native to sandstone substrates. In a lab-based reciprocal transplant experiment, we attempted to induce a plastic response in tube foot morphology. We placed sea urchins on nonnative substrates (i.e., mudstone sea urchins were placed on sandstone and vice versa), while keeping a subgroup of both populations on their original substrates as a control. Instead of a reciprocal morphological response, we found that all treatments, including the control, reduced their disc area in laboratory conditions. The results of this study show differences in morphology and mechanical properties among populations, which explains population differences in adhesive performance. Additionally, this work highlights the importance of considering the impact of phenotypic plasticity in response to captivity when interpreting the results of laboratory studies.

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来源期刊
CiteScore
3.70
自引率
6.70%
发文量
48
审稿时长
20 weeks
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