Water depth rather than substrate heterogeneity affects the clonal performance of the stoloniferous submerged plant, Vallisneria spiralis L

Water depth rather than substrate heterogeneity affects the clonal performance of the stoloniferous submerged plant, Vallisneria spiralis L
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水深而非基质异质性影响匍匐茎沉水植物苦草的克隆性能

DOI:
10.1016/j.flora.2021.151995
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发表时间:
2022-02
期刊:
影响因子:
1.9
通讯作者:
Haifang Li
Haifang Li
中科院分区:
生物学3区
文献类型:
--
作者:
Tong Wang;Lizheng Fang;Chunlin Wang;Chunhua Liu;Dan Yu;Haifang Li

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环境异质性深刻影响克隆植物的性能。为了评估基质斑块和不同水深对克隆性能的影响,我们将匍匐茎沉水植物苦草置于不同的斑块基质和水深下。我们测量了几种生长特征。我们发现,随着水深的增加,分株数、叶数和匍匐茎长度减少,分株高度、间隔厚度和生物量增加。我们没有发现不同基质之间存在显着的性状差异。此外,性状分配(性状值在异质基质的不同斑块中的分布)在大多数处理中是一致的。克隆整合通过相互连接的分株进行资源交换,使底物斑块的影响均质化。利用水养分的能力可能使沉水植物能够缓解片状基质中土壤养分的不均匀分布。此外,沉水植物根系结构简单,根系功能弱,无法从土壤中获取足够的养分。水深而非基质异质性决定了旋涡藻的植物性能。
Environmental heterogeneity profoundly influences the performance of clonal plants. To evaluate the effects of substrate patchiness and different water depths on clonal performance, we subjected the stoloniferous submerged plant Vallisneria spiralis L. to different patchy substrates and water depths. We measured several growth traits. We found that ramet number, leaf number, and stolon length decreased, and ramet height, spacer thickness, and biomass increased with increasing water depth. We saw no significant trait variations across different substrates. Furthermore, the trait allocation – the distribution of trait values in different patches of heterogeneous substrates – was consistent in most treatments. Clonal integration homogenized the effects of substrate patchiness via resource exchange through interconnected ramets. The ability to use water nutrients may enable submerged plants to alleviate the uneven distribution of soil nutrients in patchy substrates. Additionally, the simple root structure and weak root functions curtail submerged plants in obtaining sufficient nutrients from soil. Water depth rather than substrate heterogeneity determined the plant performance of V. spiralis.
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