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Adaptive Strategies Employed by Clonal Plants in Heterogeneous Patches

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FORESTS
卷 14, 期 8, 页码 -

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MDPI
DOI: 10.3390/f14081648

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water stress; plant physiology and growth; adaptive response; photosynthate allocation; clonal plants

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This study investigates the adaptation mechanisms of clonal plants under heterogeneous environmental conditions. It finds that clonal plants respond to water stress through phenotypic plasticity and physiological integration, ensuring reproduction and population stability.
Heterogeneity is widespread in natural environments; as a result, connected clonal ramets often live in areas characterized by patches of different resources. Specifically, clonal plants are frequently affected by conditions of heterogeneous water stress. This raises the question of how clonal plants grow and reproduce in areas with patches of different resources. In this study, we investigated the adaptation mechanisms of clonal plants under heterogeneous environmental conditions. On the one hand, we bore in mind that phenotypic plasticity is abundantly exhibited in clonal plants. Clonal plants respond to water stress mainly through regulation of the size of individuals, the allocation of population biomass, and the number of daughter plants, as well as the extension ability and branching intensity of clonal organs, which directly affect reproduction and population stability in clonal plants. On the other hand, we also considered the physiological integration in clonal plants which has been shown in many studies. Ramets of clonal plants normally stay connected to each other through horizontal connectors (stolons or rhizomes). Communicated substances and resources such as water, mineral nutrition, photosynthetic products, and secondary metabolites are translocated between ramets; by such means, the plant relieves stress caused by heterogeneous patches. In this study, we sought to obtain scientific references to improve our understanding of how clonal plants in natural environments acclimate to stresses caused by soil heterogeneity.

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