Cabeza Ricardo A, Pérez-Díaz Ricardo, Amigo Ramón, Salinas-Roco Sebastian, Morales-González Amanda, Del Pozo Alejandro
Laboratory of Plant Nutrition, Department of Crop Sciences, Faculty of Agricultural Sciences, University of Talca, Talca, Chile.
Centro de Estudios en Alimentos Procesados (CEAP), Talca 3460000, Chile.
Data Brief. 2024 Jun 17;55:110644. doi: 10.1016/j.dib.2024.110644. eCollection 2024 Aug.
It is expected that CO concentration will increase in the air, thereby stimulating the photosynthesis process and, hence, plant biomass production. In the case of legumes, increased biomass due to higher CO concentration can stimulate atmospheric nitrogen (N) fixation in the nodules. However, N fixation is inhibited by external N supply. Thus, biomass production and N fixation were analysed in two legumes ( L. and L.) grown at two levels of CO and three N levels. reduces fixation with high soil N (facultative), while maintains high fixation regardless of soil N levels (obligate). The N fixation and plant and nodule biomass of the two species were evaluated in a pot experiment under controlled conditions using growth chambers with artificial CO supply and N addition. The proportion of N derived from the air (%Ndfa) present in the plants' biomass was calculated from the natural abundance of N and the N concentration of plant tissues using nonlegumes reference plants. Additionally, N content data are presented for both species growing at two levels of air CO. The data may be useful for plant physiologists, especially those working on biological N fixation with non-model legumes at elevated CO.
预计空气中的一氧化碳（CO）浓度将会增加，从而刺激光合作用过程，进而促进植物生物量的产生。就豆科植物而言，较高的CO浓度导致生物量增加，会刺激根瘤中的大气氮（N）固定。然而，外部氮供应会抑制氮固定。因此，对两种豆科植物（L.和L.）在两种CO水平和三种氮水平下的生物量产生和氮固定情况进行了分析。在高土壤氮条件下会降低固氮能力（兼性），而无论土壤氮水平如何都能保持高固氮能力（专性）。在可控条件下，使用配备人工CO供应和氮添加装置的生长室，通过盆栽试验对这两个物种的氮固定以及植物和根瘤生物量进行了评估。利用非豆科参考植物，根据氮的自然丰度和植物组织中的氮浓度，计算植物生物量中来自空气的氮的比例（%Ndfa）。此外，还给出了这两个物种在两种空气CO水平下生长时的氮含量数据。这些数据可能对植物生理学家有用，尤其是那些在高CO环境下研究非模式豆科植物生物固氮的人员。
