Investigating the Impact of Elevated CO2 on Biomass Accumulation and Mineral Concentration in Foliar and Edible Tissues in Soybeans.

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Ravneet Kaur, Mary Durstock, Stephen A Prior, G Brett Runion, Elizabeth A Ainsworth, Ivan Baxter, Alvaro Sanz-Sáez, Courtney P Leisner
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引用次数: 0

Abstract

Rising atmospheric carbon dioxide (CO₂) levels are expected to enhance biomass and yield in C3 crops. However, these benefits are accompanied by significant reductions in the concentrations of essential nutrients in both foliar and edible tissues, posing potential global nutritional challenges. In this study, we grew three soybean cultivars (Clark, Flyer, and Loda) in ambient ( ~ 438 ppm) and elevated CO₂ ( ~ 650 ppm) conditions using open top chambers and measured changes in leaf-level physiological responses, biomass accumulation, and nutrient concentrations across developmental stages. Elevated CO₂ increased carbon assimilation and decreased stomatal conductance, which led to an increase in seed yield, while root biomass remained unchanged. Seed nutrient concentrations, particularly iron (Fe), zinc (Zn), manganese (Mn), boron (B), phosphorus (P), potassium (K), and magnesium (Mg), decreased at maturity. We hypothesize that reductions in seed mineral concentration resulted from enhanced carbon assimilation and biomass accumulation without a concomitant response in root biomass and nutrient uptake. This constrained the plant's ability to maintain nutrient status with increased yield at elevated CO₂, and this response was conserved across the cultivars included in this study. Future work is needed to further understand the molecular mechanisms associated with these physiological responses at elevated CO2 in soybean.

研究CO2浓度升高对大豆叶片和可食组织生物量积累和矿物质浓度的影响。
大气中二氧化碳(CO 2)水平的上升预计将提高C3作物的生物量和产量。然而,这些好处伴随着叶面和可食组织中必需营养素浓度的显著降低,构成了潜在的全球营养挑战。在本研究中,我们在环境(~ 438 ppm)和升高的CO₂(~ 650 ppm)条件下使用敞篷箱种植了3个大豆品种(Clark, Flyer和Loda),并测量了叶片水平生理反应、生物量积累和营养物质浓度在发育阶段的变化。升高的CO₂增加了碳同化,降低了气孔导度,导致种子产量增加,而根系生物量保持不变。种子养分浓度,特别是铁(Fe)、锌(Zn)、锰(Mn)、硼(B)、磷(P)、钾(K)和镁(Mg),在成熟时下降。我们假设种子矿物质浓度的降低是由于碳同化和生物量积累的增强,而根系生物量和养分吸收没有相应的反应。这限制了植物在高CO₂环境下维持营养状态和产量增加的能力,并且这种反应在本研究中包括的品种中是保守的。未来的工作还需要进一步了解这些生理反应的分子机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Plant, Cell & Environment
Plant, Cell & Environment 生物-植物科学
CiteScore
13.30
自引率
4.10%
发文量
253
审稿时长
1.8 months
期刊介绍: Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.
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