Zhang Li-Min, Roiloa Sergio R, Zhang Jia-Fan, Yu Wen-Han, Qiu Chen-Yan, Wang Dan-Hao, Yu Fei-Hai
Institute of Wetland Ecology & Clone Ecology, Taizhou University, Taizhou, China.
Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, China.
Front Plant Sci. 2022 Jun 27;13:890309. doi: 10.3389/fpls.2022.890309. eCollection 2022.
Parental (environmental) effects can modify the growth of offspring, which may play an essential role in their adaptation to environmental variation. While numerous studies have tested parental effects on offspring growth, most have considered offspring growth of only one generation and very few have considered offspring growth of different generations. We conducted a greenhouse experiment with an aquatic clonal plant . We grew a single ramet of under low or high nutrients, the initial (parent) ramets produced three different generations of offspring ramets, and these offspring ramets were also subjected to the same two nutrient levels. High nutrients currently experienced by the offspring increased biomass accumulation and ramet number of all three offspring generations of . However, these positive effects on biomass were greater when the offspring ramets originated from the parent ramets grown under low nutrients than when they were produced by the parent ramets grown under high nutrients. These results suggest that parental effects can impact the performance of different offspring generations of clonal plants. However, heavier offspring ramets produced under high nutrients in parental conditions did not increase the subsequent growth of the offspring generations. This finding indicates that parental provisioning in favorable conditions may not always increase offspring growth, partly depending on root allocation but not ramet size such as ramet biomass.
亲代（环境）效应可以改变子代的生长，这可能在它们适应环境变化中发挥重要作用。虽然有许多研究测试了亲代对子代生长的影响，但大多数研究只考虑了一代子代的生长，很少有研究考虑不同代次子代的生长。我们用一种水生克隆植物进行了一项温室实验。我们在低营养或高营养条件下培养单个分株，初始（亲代）分株产生了三代不同的子代分株，并且这些子代分株也被置于相同的两种营养水平下。子代当前所经历的高营养增加了该植物所有三代子代的生物量积累和分株数量。然而，当子代分株源自低营养条件下生长的亲代分株时，这些对生物量的积极影响比对高营养条件下生长的亲代分株产生的子代分株更大。这些结果表明亲代效应可以影响克隆植物不同代次子代的表现。然而，在亲代条件下高营养环境中产生的较重子代分株并没有增加子代后代的后续生长。这一发现表明，在有利条件下的亲代供给并不总是能增加子代生长，部分取决于根系分配而非分株大小，如分株生物量。
