Harris Zachary N, Pratt Julia E, Bhakta Niyati, Frawley Emma, Klein Laura L, Kwasniewski Misha T, Migicovsky Zoë, Miller Allison J
Department of Biology Saint Louis University St. Louis Missouri USA.
Donald Danforth Plant Science Center St. Louis Missouri USA.
Plant Direct. 2022 Aug 19;6(8):e440. doi: 10.1002/pld3.440. eCollection 2022 Aug.
Plants take up elements through their roots and transport them to their shoot systems for use in numerous biochemical, physiological, and structural functions. Elemental composition of above-ground plant tissues, such as leaves, reflects both above- and below-ground activities of the plant, as well the local environment. Perennial, grafted plants, where the root system of one individual is fused to the shoot system of a genetically distinct individual, offer a powerful experimental system in which to study how genetically distinct root systems influence the elemental composition of a common shoot system. We measured elemental composition of over 7,000 leaves in the grapevine cultivar "Chambourcin" growing ungrafted and grafted to three rootstock genotypes. Leaves were collected over multiple years and phenological stages (across the season) and along a developmental time series. Temporal components of this study had the largest effect on leaf elemental composition, and rootstock genotype interacted with year, phenological stage, and leaf age to differentially modulate leaf elemental composition. Further, the local, above-ground environment affected leaf elemental composition, an effect influenced by rootstock genotype. This work highlights the dynamic nature by which root systems interact with shoot systems to respond to temporal and environmental variation.
植物通过根系吸收元素，并将其运输到地上部分，用于多种生化、生理和结构功能。地上植物组织（如叶片）的元素组成既反映了植物地上和地下的活动，也反映了当地环境。多年生嫁接植物，即一个个体的根系与基因不同的另一个个体的地上部分相连，提供了一个强大的实验系统，用于研究基因不同的根系如何影响共同地上部分的元素组成。我们测量了葡萄品种“尚布尔辛”未嫁接以及嫁接到三种砧木基因型上时超过7000片叶片的元素组成。叶片在多年间、多个物候阶段（整个生长季）以及沿发育时间序列进行采集。本研究的时间因素对叶片元素组成影响最大，砧木基因型与年份、物候阶段和叶片年龄相互作用，以不同方式调节叶片元素组成。此外，当地的地上环境影响叶片元素组成，这种影响受砧木基因型的影响。这项工作突出了根系与地上部分相互作用以响应时间和环境变化的动态特性。
