Article
Plant Sciences
Nestor F. Del-Saz, Ariadna Iglesias-Sanchez, David Alonso-Forn, Miguel Lopez-Gomez, Francisco Palma, Maria Jose Clemente-Moreno, Alisdair R. Fernie, Miquel Ribas-Carbo, Igor Florez-Sarasa
Summary: The study demonstrates that salt and water stress induce respiration and accumulation of stress-related metabolites (SRMs) in plants, which benefits photosynthesis. Additionally, the alternative oxidase pathway (AOP) prevents the inhibition of the cytochrome oxidase pathway (COP) under stress conditions and improves photosynthetic performance. The research highlights the importance of AOP in providing flexibility to carbon metabolism for the accumulation of SRMs.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Maria Paz Jerez, Jose Ortiz, Catalina Castro, Elizabeth Escobar, Carolina Sanhueza, Nestor Fernandez Del-Saz, Miquel Ribas-Carbo, Teodoro Coba de la Pena, Enrique Ostria-Gallardo, Susana Fischer, Patricio Alejandro Castro, Luisa Bascunan-Godoy
Summary: Chenopodium quinoa ecotypes from Altiplano and the south of Chile exhibit different physiological and biochemical responses to nitrate and ammonium, impacting their growth and productivity.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Biochemical Research Methods
Charlotte E. Bopp, Jakov Bolotin, Sarah G. Pati, Thomas B. Hofstetter
Summary: Monitoring stable oxygen isotope ratios provides insights into fundamental processes in bio(geo)chemistry and environmental sciences. However, interference from argon can lead to overestimation of oxygen isotope signatures, requiring instrumental modifications and post-measurement corrections.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Environmental Sciences
Yuxiao Gou, Tomihiko Higuchi, Yuki Iino, Tsuyoshi Nagasaka, Yuichi Shimizu, Kotaro Shirai, Takashi Kitagawa
Summary: This study determined the oxygen isotope fractionation equation for chum salmon and found that both oxygen and carbon isotopes deplete simultaneously in lower temperature settings.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Yasheng Shi, Cai Li, Zanfang Jin, Yongqi Zhang, Jiazheng Xiao, Feili Li
Summary: The study identified the sources and formation pathways of NO3- in Ningbo, revealing seasonal variations and suggesting that mobile sources are the major contributors to NOx emissions in the area. The research also emphasized the importance of considering isotopic fractionation in source apportionment models.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Justin A. Hayles, Bryan A. Killingsworth
Summary: The study found that some kinetic isotope effects result in large isotopic variations, while other kinetic isotope effects exhibit relationships similar to equilibrium isotope effects.
Article
Geochemistry & Geophysics
Anna Pierchala, Kazimierz Rozanski, Marek Dulinski, Zbigniew Gorczyca
Summary: Advances in laser technology have allowed for simultaneous analyses of three heavy water isotopologues, leading to renewed interest in studying the hydrological cycle using the full isotopic composition of water. Laboratory experiments were conducted to quantify diffusion-induced fractionation of the (H2O)-H-1-O-17 isotopologue during water evaporation. The results showed that the O-17-excess parameter is largely unaffected by temperature changes but is sensitive to relative humidity changes. Additionally, it was found that the kinetic fractionation coefficients of heavy water isotopologues in air followed a linear dependence on the relative humidity deficit, confirming the validity of the widely used Craig-Gordon isotope model.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Maria Rosa Scicchitano, Juan Carlos de Obeso, Tyler B. Blum, John W. Valley, Peter B. Kelemen, William O. Nachlas, William Schneider, Michael J. Spicuzza, Franziska D. H. Wilke, Vladimir Roddatis
Summary: This study presents a new empirical calibration of oxygen isotope fractionation between serpentine and water, aiming to improve the accuracy of reconstructions of fluid-rock interactions during low-temperature serpentinization processes. The new calibration was determined by analyzing oxygen isotope ratios in mineral pairs using SIMS technique and combining the results with existing calibrations. It provides more reliable constraints on the physical-chemical conditions of serpentinization.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Plant Sciences
Igor Florez-Sarasa, Elina Welchen, Sofia Racca, Daniel H. Gonzalez, Jose G. Vallarino, Alisdair R. Fernie, Miquel Ribas-Carbo, Nestor Fernandez Del-Saz
Summary: This study reveals the coordination of different pathways of primary metabolism in plants to support growth adaptation under different photoperiods, with in vivo respiratory activities and stress signaling metabolites playing important roles in modulating energy constraints.
Article
Geosciences, Multidisciplinary
Markus C. Leuenberger, Shyam Ranjan
Summary: Since 1971, water isotope measurements have been conducted at various locations in Switzerland by the Climate and Environmental Physics Division at the University of Bern. The study investigates the effects of meteorological parameters such as temperature, turbulence factor, and humidity on the water isotopes through the analysis of isotope ratios.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Shanqi Liu, Yongbing Li, Menghan Li, Zhiming Yang, Jianming Liu, Yanan Shen
Summary: Fe, Ni, and S isotopes are important chemical tracers that complement each other to improve our understanding of Earth's evolution. This study investigates the equilibrium fractionation factors of Fe, Ni, and S isotopes in solid solutions, providing valuable insights into the effect of cation contents on isotopic signatures. The results contribute to a better understanding of physical, chemical, and geo-biological evolution on Earth.
Article
Geochemistry & Geophysics
Yusuke Fukami, Teruhiko Kashiwabara, Hiroshi Amakawa, Takazo Shibuya, Akira Usui, Katsuhiko Suzuki
Summary: This study presents the concentrations and stable isotope compositions of Te in ferromanganese crusts collected from the slope of two seamounts in the Northwest Pacific Ocean. The Te concentration decreases sharply with depth at shallow regions, while the Te isotope composition exhibits two trends depending on water depth. These variations may be related to co-precipitation processes with Fe and oxidation involving Mn, as well as changes in dissolved oxygen concentration in seawater. The Te isotope compositions in ferromanganese crusts could potentially be used as a proxy for changes in the oxygen minimum zone of paleoceans.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Maria Burian, Anna Podgorska, Monika Ostaszewska-Bugajska, Bozena Szal
Summary: This study found that modification of apoplastic reactive oxygen species metabolism leads to growth retardation in plants under ammonium nutrition. Disruption of the D isoform of respiratory burst oxidase homolog resulted in lower apoplastic superoxide and hydrogen peroxide levels, downregulation of ROS sensing markers, and downregulation of ROS-responsive signaling pathway. These modifications make the transgenic plants more sensitive to the inhibitory effects of ammonium.
Review
Environmental Sciences
Lian Zhang, Yongguang Yin, Yanbin Li, Yong Cai
Summary: This review evaluates the analytical methods for measuring Hg isotopic composition of MeHg, summarizes the extent and characteristics of Hg isotopic fractionation during MeHg transport and transformation, and discusses several applications of MeHg isotopic fractionation signatures. The existing problems and future directions in MeHg isotope fractionation are also highlighted.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biochemistry & Molecular Biology
Ildiko Szanto
Summary: Cancer cells can adapt to hypoxic environments through metabolic rewiring and synthesis of antioxidant molecules. NOX4, a member of the NOX family enzymes, plays a key role in the oncogenic metabolic adaptation of cancer cells by regulating diverse metabolic processes.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Igor Florez-Sarasa, Elina Welchen, Sofia Racca, Daniel H. Gonzalez, Jose G. Vallarino, Alisdair R. Fernie, Miquel Ribas-Carbo, Nestor Fernandez Del-Saz
Summary: This study reveals the coordination of different pathways of primary metabolism in plants to support growth adaptation under different photoperiods, with in vivo respiratory activities and stress signaling metabolites playing important roles in modulating energy constraints.
Review
Plant Sciences
Jaume Flexas, Maria J. Clemente-Moreno, Josefina Bota, Tim J. Brodribb, Jorge Gago, Yusuke Mizokami, Miquel Nadal, Alicia Perera-Castro, Margalida Roig-Oliver, Daisuke Sugiura, Dongliang Xiong, Marc Carriqui
Summary: The article discusses the impact of cell wall thickness on mesophyll conductance to CO2 and photosynthesis, and proposes a hypothetical mechanism for the influence of thickness and composition on photosynthesis.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Maria Ancin, Luis Larraya, Igor Florez-Sarasa, Camille Benard, Alicia Fernandez-San Millan, Jon Veramendi, Yves Gibon, Alisdair R. Fernie, Iker Aranjuelo, Inmaculada Farran
Summary: This study investigated the influence of overexpressing Trx m on C and N partitioning in tobacco plants, showing altered metabolism with activation of N metabolism and decrease in carbohydrate accumulation. Metabolomic and enzymatic analyses revealed up-regulation of the glutamine synthetase-glutamate synthase pathway and increased stability of glutamine synthetase, leading to higher photorespiration and nitrate accumulation in transgenic plants. Overall, Trx m was identified as a crucial molecular mediator of N metabolism in plant chloroplasts.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Plant Sciences
Luca Morelli, Sandi Paulisi, Wenting Qin, Ariadna Iglesias-Sanchez, Irma Roig-Villanova, Igor Florez-Sarasa, Manuel Rodriguez-Concepcion, Jaime F. Martinez-Garcia
Summary: Plants growing in search of light can be shaded by other plants, leading to a decrease in the R:FR ratio. Different Brassicaceae species respond differently to low R:FR and low PAR, with shade-tolerant plants showing good adaptation and shade-avoider species exhibiting strong elongation under low R:FR exposure. Exposure to low R:FR can improve photoacclimation in shade-avoider plants, triggering changes in gene expression and chloroplast structure.
Article
Plant Sciences
Nestor F. Del-Saz, Ariadna Iglesias-Sanchez, David Alonso-Forn, Miguel Lopez-Gomez, Francisco Palma, Maria Jose Clemente-Moreno, Alisdair R. Fernie, Miquel Ribas-Carbo, Igor Florez-Sarasa
Summary: The study demonstrates that salt and water stress induce respiration and accumulation of stress-related metabolites (SRMs) in plants, which benefits photosynthesis. Additionally, the alternative oxidase pathway (AOP) prevents the inhibition of the cytochrome oxidase pathway (COP) under stress conditions and improves photosynthetic performance. The research highlights the importance of AOP in providing flexibility to carbon metabolism for the accumulation of SRMs.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Carolina Sanhueza, Daniela Cortes, Danielle A. Way, Francisca Fuentes, Luisa Bascunan-Godoy, Nestor Fernandez Del-Saz, Patricia L. Saez, Leon A. Bravo, Lohengrin A. Cavieres
Summary: Projected rises in atmospheric CO2 concentration and minimum night-time temperatures may have important effects on plant carbon metabolism in the Antarctic Peninsula. The response of the two vascular plant species, Colobanthus quitensis and Deschampsia antarctica, to elevated CO2 levels and nocturnal warming were assessed. The results showed that C. quitensis had reduced photosynthesis under elevated CO2 or nocturnal warming, while D. antarctica was not affected. Changes in mitochondrial size and number were observed in both species. The study suggests that D. antarctica may be more successful than C. quitensis in adapting to climate change.
Article
Plant Sciences
Jose Ortiz, Carolina Hernandez-Fuentes, Patricia L. Saez, Nestor Fernandez Del Saz, Lohengrin A. Cavieres
Summary: There are two main types of leaves in vascular plant species: compound and simple. Compound leaves have higher productivity due to their larger projected area, while simple leaves have higher stress tolerance during drought due to their ability to pack more mass tissue in a smaller projected area. However, compound leaves have more efficient convective cooling, which helps alleviate water loss in drought periods. In Central Chile, both simple and compound leaf species coexist, but the impact of severe droughts on their photosynthetic traits has not been studied. This study found that compound leaf species had higher net photosynthesis (A(N)) and mesophyll conductance (g(m)) under well-watered conditions. However, both leaf types were negatively affected by drought, despite compound leaves having lower foliar temperature. This suggests that the matorral species in Central Chile will be severely impacted in terms of A(N) by the ongoing megadrought in the region.
Correction
Plant Sciences
Jose Ortiz, Carolina Hernandez-Fuentes, Patricia L. Saez, Nestor Fernandez Del Saz, Lohengrin A. Cavieres
Article
Ecology
Miquel Nadal, Maria J. Clemente-Moreno, Alicia V. V. Perera-Castro, Margalida Roig-Oliver, Yusuke Onoda, Javier Gulias, Jaume Flexas
Summary: In recent years, researchers have been attempting to establish the connections between pressure-volume parameters and the leaf economics spectrum in order to gain a deeper understanding of the relationships among leaf traits. Through both theoretical and empirical evidence, we demonstrated the coordination between turgor loss point and associated traits with net CO2 assimilation and leaf mass per area. By considering the components of leaf mass per area and leaf saturated water content in ecophysiological studies, we can gain a broader perspective on leaf structure and function.
Article
Plant Sciences
Jorge Gago, Miquel Nadal, Maria Jose Clemente-Moreno, Carlos Maria Figueroa, David Barbosa Medeiros, Neus Cubo-Ribas, Lohengrin Alexis Cavieres, Javier Gulias, Alisdair Robert Fernie, Jaume Flexas, Leon Aloys Bravo
Summary: Deschampsia antarctica is a native vascular plant in Antarctica, and the availability of nutrients in the soil affects its photosynthetic and stress tolerance mechanisms. Plants growing on low-nutrient availability soils have more limiting photosynthetic and stress tolerance performances, while plants in nutrient-rich soils show vigorous growth without appreciable levels of stress.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Plant Sciences
Leonardo Cifuentes, Maximo Gonzalez, Katherine Pinto-Irish, Rodrigo Alvarez, Teodoro Coba de la Pena, Enrique Ostria-Gallardo, Nicolas Franck, Susana Fischer, Gabriel Barros, Catalina Castro, Jose Ortiz, Carolina Sanhueza, Nestor Fernandez Del-Saz, Luisa Bascunan-Godoy, Patricio A. Castro
Summary: Seed priming can enhance the ability of seedlings to cope with stress by altering metabolic responses, and it is particularly beneficial for salt-tolerant plants to improve their adaptability to saline conditions.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Maria Paz Jerez, Jose Ortiz, Catalina Castro, Elizabeth Escobar, Carolina Sanhueza, Nestor Fernandez Del-Saz, Miquel Ribas-Carbo, Teodoro Coba de la Pena, Enrique Ostria-Gallardo, Susana Fischer, Patricio Alejandro Castro, Luisa Bascunan-Godoy
Summary: Chenopodium quinoa ecotypes from Altiplano and the south of Chile exhibit different physiological and biochemical responses to nitrate and ammonium, impacting their growth and productivity.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Luis G. Quintanilla, Ismael Aranda, Maria Jose Clemente-Moreno, Joan Pons-Perpinya, Jorge Gago
Summary: By comparing the leaf functional traits of Oeosporangium tinaei (HHPP) and its diploid parents, it was found that HH has higher investment per unit area of light-capturing surface, lower carbon assimilation rate per unit mass for the same midday water potential, higher non-enzymatic antioxidant capacity, higher carbon content, and lower contents of nitrogen, phosphorus, and other macronutrients compared to PP. These traits allow HH to live in microhabitats with less availability of water and nutrients and have a greater capacity for resurrection. PP, on the other hand, has higher assimilation capacity and lower antioxidant capacity, explaining its preference for more humid and nutrient-rich microhabitats. HHPP traits are mostly intermediate between HH and PP, allowing the allotetraploid to occupy the free niche space left by the diploids.