1. Clonal plants play key roles in maintaining community productivity and stability in many ecosystems. Connected individuals (ramets) of clonal plants can translocate and share, for example, photosynthates, water and nutrients, and such physiological integration may affect performance of clonal plants both in heterogeneous and homogeneous environments. However, we still lack a general understanding of whether or how physiological integration in clonal plants differs across homogeneous versus heterogeneous environments.
2. We compiled data from 198 peer‐reviewed scientific studies conducted in 19 countries with 108 clonal plant species from 35 families, and carried out a meta‐analysis of effects of physiological integration on 16 traits related to plant growth, morphology, physiology or allocation. Our analyses evaluated these relationships in (A) heterogeneous environments where at least one resource essential for plant growth (e.g. light, soil water and mineral nutrients) or non‐resource factor (e.g. grazing, trampling and burial) is spatially non‐uniformly distributed and (B) homogeneous environments where all these factors are spatially uniformly distributed.
3. Physiological integration increased growth of whole clones in both homogeneous and heterogeneous environments due to its highly significant contribution to growth of recipient ramets. Integration did not affect growth of donor ramets in heterogeneous environments, but decreased it in homogeneous environments.
4. Integration affected physiological traits of donor ramets in neither homogeneous nor heterogeneous environments. It did not affect any physiological traits of recipient ramets in homogeneous environments, but increased most of them in heterogeneous environments. For donor ramets, integration increased height by 53% and internode length by 37% in heterogeneous environments, but had no effect in homogeneous environments. For recipient ramets, integration increased height by 73% in homogeneous environments and by 115% in heterogeneous environments, and increased internode length by 35% only under heterogeneous environments. In heterogeneous environments, integration increased biomass allocation to roots of donor ramets under high water/nutrient conditions and decreased it under high light.
5. Physiological integration plays a strong role in clonal plant physiology, morphology and growth, especially for recipient ramets in heterogeneous environments. Therefore, physiological integration may have contributed to the widespread of clonal plants in nature and their dominance in many ecosystems. It may also play important roles in invasion success of alien clonal plants and in maintaining functions and stability of ecosystems where clonal plants are abundant.

中文翻译：

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均质与异质环境下克隆植物生理整合效应的荟萃分析

1. 在许多生态系统中，克隆植物在维持社区生产力和稳定性方面发挥着关键作用。克隆植物的连接个体（分株）可能易位并共享例如光合产物，水和养分，而这种生理整合可能会影响克隆植物在异质和均质环境中的性能。然而，我们仍然对克隆植物在同质和异质环境之间的生理整合是否有所差异缺乏普遍的了解。
2. 我们收集了在19个国家/地区进行的198项经同行评审的科学研究的数据，这些科学研究涉及35个科的108种无性植物，并进行了生理整合对与植物生长，形态，生理或分配相关的16个性状的影响的荟萃分析。我们的分析评估了（A）异质环境中的这些关系，在异质环境中，至少有一种植物生长必不可少的资源（例如光，土壤水和矿质养分）或非资源因素（例如放牧，践踏和掩埋）在空间上分布不均， （B）所有这些因素在空间上均一分布的均质环境。
3. 生理整合增加了完整克隆在同质和异质环境中的生长，这是由于其对受体分株的生长具有重大贡献。整合并没有影响异质环境中供体分株的生长，但是在均质环境中却降低了供体分株的生长。
4. 整合影响均质或异质环境中供体分株的生理特性。在均质环境中，它不会影响受体分株的任何生理特性，但在异质环境中，大多数分株会增加。对于供体分株，在异质环境中，整合增加了53％的高度，在节间长度中增加了37％的节点间长度，但在同质环境中没有作用。对于接收者分母，集成在同质环境中将高度增加73％，在异质环境中将高度增加115％，仅在异质环境中，节点间长度增加35％。在非均质环境中，高水分/养分条件下的整合增加了生物量在施主分株根部的分配，而在强光下则减少了生物量。
5. 生理整合在克隆植物的生理，形态和生长中起着重要作用，尤其是对于异质环境中的受体分株。因此，生理整合可能促进了克隆植物在自然界的广泛传播及其在许多生态系统中的主导地位。它在外来克隆植物的入侵成功以及维持克隆植物丰富的生态系统的功能和稳定性方面也可能起重要作用。