Zhang Li-Min, Zheng Li-Li, Yu Fei-Hai
Institute of Wetland Ecology & Clone Ecology, Taizhou University, Taizhou, Zhejiang, China.
Front Plant Sci. 2025 Jan 17;15:1518400. doi: 10.3389/fpls.2024.1518400. eCollection 2024.
Although numerous studies have independently tested the roles of physiological integration and parental effects on the performance of clonal plant species, few have assessed them simultaneously. Moreover, the capacity for physiological integration differs greatly within species of clonal plants. We conducted a greenhouse experiment with eight genotypes of the clonal herb In the first phase, we either severed or maintained the connections between the original proximal nodes (the basal portion) and the new distal nodes (the apical portion) of each genotype. In the second phase, the ramets in the apical portion produced in the first phase were selected and cultivated, and their connections were subjected to the same severance treatments. In the first phase, the negative effects of severance on the apical portion balanced the positive effects of severance on the basal portion, resulting in no net effect of severance on total mass, leaf mass, stem mass, and ramet number for the whole clone. In the second phase, the effects of parental severance on stem mass of the apical portion of varied among the eight genotypes. Additionally, the positive effect of physiological integration on offspring generations was greater in the apical portion and the whole clone of one genotype when the parental connections were intact than when they were severed, whereas it was greater in the apical portion of another genotype when the parental connections were severed than when they were intact. Our results suggest that clonal parental effects can influence the capacity for physiological integration of offspring generations and that these effects may differ among genotypes within a species.
尽管众多研究已分别测试了生理整合和母体效应在克隆植物物种表现中的作用，但很少有研究同时对它们进行评估。此外，克隆植物物种内部的生理整合能力差异很大。我们对克隆草本植物的八个基因型进行了一项温室实验。在第一阶段，我们要么切断要么保持每个基因型的原始近端节点（基部）和新的远端节点（顶部）之间的连接。在第二阶段，选择并培育在第一阶段产生的顶部部分的分株，并对它们的连接进行相同的切断处理。在第一阶段，切断对顶部部分的负面影响与切断对基部部分的正面影响相平衡，导致切断对整个克隆体的总质量、叶质量、茎质量和分株数量没有净影响。在第二阶段，母体切断对八个基因型中顶部部分茎质量的影响各不相同。此外，当亲本连接完整时，生理整合对一个基因型的顶部部分和整个克隆体后代的积极影响大于亲本连接被切断时，而对于另一个基因型，当亲本连接被切断时，生理整合对顶部部分的积极影响大于亲本连接完整时。我们的结果表明，克隆母体效应可以影响后代的生理整合能力，并且这些效应在一个物种内的不同基因型之间可能有所不同。
