Article
Plant Sciences
Dileepa M. Jayawardena, Scott A. Heckathorn, Krishani K. Rajanayake, Jennifer K. Boldt, Dragan Isailovic
Summary: The combination of elevated CO2 and warming reduces plant growth, nitrate and ammonium uptake rates, root-to-shoot net N translocation, and whole-plant N assimilation in tomato plants. This decrease in N assimilation is mainly driven by the inhibition of nitrate assimilation, rather than root resource limitations or damage to N-assimilatory proteins. The reduced N uptake and assimilation are likely due to a decrease in plant N demand in tomato plants under elevated CO2 and warming conditions.
Article
Horticulture
Michael D. Thomas, Scott A. Heckathorn, Jennifer K. Boldt
Summary: We previously demonstrated that chronic warming and elevated CO2 concentrations cause hyponastic leaf and petiole bending in tomato plants. In this study, we further investigated the mechanism for this phenomenon across different temperatures and CO2 levels, as well as at various stages of plant growth. The results indicate that eCO2 affects the well-known thermal hyponastic response of leaves, which has implications for future plant responses to climate change.
Article
Agronomy
Jinjie Fan, Xun Wu, Yangliu Yu, Qiang Zuo, Jianchu Shi, Moshe Halpern, Jiandong Sheng, Pingan Jiang, Alon Ben-Gal
Summary: Delineating root-water-uptake (RWU) under conditions with augmented CO2 concentrations is crucial for irrigation scheduling in response to climate change. The effects of increased CO2 concentration (e[CO2]) on RWU and the development of a RWU model were studied through two experiments, which demonstrated the stimulation of plant growth and the decrease in RWU activity under e[CO2]. The RWU model accurately simulated soil water transport and wheat transpiration under e[CO2].
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Plant Sciences
Anna Sytiuk, Samuel Hamard, Regis Cereghino, Ellen Dorrepaal, Honorine Geissel, Martin Kuttim, Mariusz Lamentowicz, Eeva Stiina Tuittila, Vincent E. J. Jassey
Summary: In this study, a reciprocal transplant experiment was conducted along a climate gradient in Europe to investigate the effects of climate warming on the seasonality of metabolites produced by Sphagnum mosses and the consequences for peatland carbon uptake. The results showed that Sphagnum species exhibited consistent responses to warming, with shifts in their primary or secondary metabolites according to seasons. These shifts were also correlated with changes in gross ecosystem productivity, particularly in spring and autumn. The findings highlight the plasticity of plant metabolites and their ability to impact carbon processes in ecosystems.
Article
Biodiversity Conservation
Robin Gineyts, Audrey Niboyet
Summary: Global change may have profound effects on soil nitrogen cycling, particularly on nitrous oxide emissions mediated by nitrification and denitrification. This meta-analysis examined the effects of elevated CO2 on nitrification and denitrification based on numerous observations and experiments. The results showed that elevated CO2 increased potential nitrification, abundance of functional genes, and potential denitrification.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Jing Wang, Xuesong Wang, Fenli Zheng, Hanmei Wei, Miaomiao Zhao, Jianyu Jiao
Summary: This study aimed to determine the characteristics and potential mechanisms of microbial metabolic limitation at different growth stages of winter wheat in response to elevated CO2 concentrations, warming, and drought. The results showed that soil microbes were mainly limited by carbon and phosphorus. Microbial carbon limitation significantly decreased at the jointing stage and increased at the grain filling stage in response to elevated CO2 and warming, while microbial phosphorus limitation decreased under elevated CO2 at the anthesis and grain filling stages. These findings are important for understanding microbe-mediated carbon and nutrient cycles and providing guidance for soil nutrient management in a changing climate.
Article
Soil Science
Louise C. Andresen, Per Ambus, Claus Beier, Anders Michelsen
Summary: Nitrogen dynamic is a crucial factor in N-limited terrestrial ecosystems' response to climate change. In this study, the partitioning of N in a grassland heath was studied, along with the impact of multiple climate change factors on long-term N retention. After 6 years, it was observed that the majority of the applied N-15 was stabilized in the soil, while the plant compartment and microbial biomass retained a small proportion. The results suggest that N retention in this ecosystem is moderate compared to similar studies in forest ecosystems.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2023)
Article
Environmental Sciences
Ximei Han, Guiyao Zhou, Qin Luo, Olga Ferlian, Lingyan Zhou, Jingjing Meng, Yuan Qi, Jianing Pei, Yanghui He, Ruiqiang Liu, Zhenggang Du, Jilan Long, Xuhui Zhou, Nico Eisenhauer
Summary: The effect of elevated atmospheric CO2 concentrations on plant biomass responses is still unclear, particularly in terms of how it affects phosphorus cycling in terrestrial ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Shuqi Xiao, Chao Wang, Kai Yu, Genyuan Liu, Shuang Wu, Jinyang Wang, Shuli Niu, Jianwen Zou, Shuwei Liu
Summary: Studies have shown that nitrogen deposition has significant effects on carbon uptake in forests and grasslands, as well as on N2O emissions from soil. However, the impact on SOC pool is limited. Overall, nitrogen deposition increases the net greenhouse gas balance in forests and grasslands.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biodiversity Conservation
Tania L. Maxwell, Alberto Canarini, Ivana Bogdanovic, Theresa Bockle, Victoria Martin, Lisa Noll, Judith Prommer, Joana Seneca, Eva Simon, Hans-Peter Piepho, Markus Herndl, Erich M. Potsch, Christina Kaiser, Andreas Richter, Michael Bahn, Wolfgang Wanek
Summary: Depolymerization of high-molecular weight organic nitrogen is a major bottleneck in soil nitrogen cycling. This study investigated the effects of increased temperature, elevated atmospheric CO2, and drought on soil protein depolymerization and microbial amino acid consumption. The results showed that temperature had distinct effects on soil organic N processes, while drought led to a doubling of organic N process rates. This study contributes to our understanding of terrestrial N cycling in a future world.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Soil Science
David Reinthaler, Eliza Harris, Erich M. Poetsch, Markus Herndl, Andreas Richter, Herbert Wachter, Michael Bahn
Summary: This study conducted a global change experiment in a managed temperate grassland and found that under future climate conditions, soil respiration was higher and the reductions induced by drought were delayed. In the future scenario, extreme drought led to more pronounced reductions and post-drought responses of soil respiration.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Plant Sciences
Eduardo Habermann, Eduardo Augusto Dias de Oliveira, Daniele Ribeiro Contin, Joao Vitor Campos Pinho Costa, Katia Aparecida de Pinho Costa, Carlos Alberto Martinez
Summary: This study investigates the effects of elevated carbon dioxide concentration and warming on managed tropical grasslands. The results show that warming cancels out the improvements caused by elevated carbon dioxide concentration in terms of plant transpiration and water relations.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Jianqing Wang, Lianqing Li, Shu Kee Lam, Xiuzhen Shi, Genxing Pan
Summary: Projected global climate change poses a potential threat to nutrient utilization in agroecosystems. However, the combined effects of elevated [CO2] and canopy warming on nutrient concentrations and translocations in plants are not well understood. This study conducted an open-air field experiment to investigate the impact of elevated [CO2] and canopy air warming on nutrient status during the growing season of winter wheat. The results showed that canopy warming played a more important role in nutrient translocation from belowground to aboveground than elevated [CO2].
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Environmental Sciences
Lu Zhang, Yunfei Sun, Jiahui Cheng, Guilian Cui, Yuan Huang, Zhou Yang
Summary: The increasing atmospheric CO2 and temperature have complex effects on the induced defense of phytoplankton. Elevated CO2 enhances the morphological defense in phytoplankton, while high temperature exerts overwhelming inhibitory effects on this defense, leading to a decrease in the maximum number of cells per particle.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Plant Sciences
Anne Marmagne, Celine Masclaux-Daubresse, Fabien Chardon
Summary: This study analyzed the impact of environmental stresses on nitrogen fluxes within plants during seed filling and provided a schematic representation of the major factors that regulate the balance between nitrogen remobilization and nitrogen uptake under stress and control conditions.
JOURNAL OF PLANT PHYSIOLOGY
(2022)