Article
Plant Sciences
Kenji Suetsugu, Takashi F. Haraguchi, Ichiro Tayasu
Summary: This study provides evidence that the fully mycoheterotrophic orchids Cremastra aphylla and Cremastra appendiculata obtain carbon from deadwood via saprotrophic fungi. The findings suggest that mixotrophic relationships associated with wood-decaying fungi represent a novel evolutionary pathway for full mycoheterotrophy in orchids.
Review
Plant Sciences
Marc-Andre Selosse, Remi Petrolli, Maria Isabel Mujica, Liam Laurent, Benoit Perez-Lamarque, Tomas Figura, Amelia Bourceret, Hans Jacquemyn, Taiqiang Li, Jiangyun Gao, Julita Minasiewicz, Florent Martos
Summary: The roots of orchids associate with a variety of soil fungi, including a group called rhizoctonias that is most frequently found. However, there are also orchid species that target other fungal taxa with different phylogenetic positions and ecological traits. This study offers an evolutionary framework for understanding these symbiotic associations.
Article
Ecology
Kenji Suetsugu, Jun Matsubayashi
Summary: The nutritional strategy of mixotrophy, merging autotrophy and heterotrophy, is widespread among plants and aquatic organisms. Green orchids, such as Calypso bulbosa, show a flexible mechanism of partial mycoheterotrophy driven by underground morphology. The presence of coralloid rhizomes can affect the degree of mycoheterotrophy in these orchids.
FUNCTIONAL ECOLOGY
(2021)
Article
Plant Sciences
Kenji Suetsugu, Jun Matsubayashi
Summary: Most land plants form mutualistic mycorrhizal symbioses with fungal partners, but mycoheterotrophs exploit fungal partners by reversing carbon movement. This study focused on a photosynthetic orchid, Apostasia nipponica, and found that it gains carbon through both photosynthesis and fungal cheating (partial mycoheterotrophy), shedding light on the evolution of mycoheterotrophy in orchids.
Article
Ecology
Masahide Yamato, Ryota Kosaka, Yurika Masui, Yugo Goda, Shunsei Shirasaka, Atsushi Maruyama, Tomohisa Yukawa
Summary: The habitat with giant C. falcata individuals was found to have Sebacinales fungi as the dominant mycobiont, possibly contributing to the growth of giant individuals. However, seedling growth of C. falcata was mainly impacted by Thelephoraceae fungi. Therefore, the growth of giant individuals may be a result of previous colonization by Sebacinales fungi.
ECOLOGICAL RESEARCH
(2021)
Article
Ecology
Deyi Wang, Gerhard Gebauer, Hans Jacquemyn, Franziska E. Zahn, Sofia I. F. Gomes, Johanna Lorenz, Harrie van der Hagen, Menno Schilthuizen, Vincent S. F. T. Merckx
Summary: The symbiotic associations between orchids and various ecological guilds of fungi provide an ideal study system for understanding the evolution and ecophysiology of mycorrhizal symbiosis. This research investigated the mycorrhizal communities and isotope signatures of a terrestrial orchid, Neottia ovata, growing in different light conditions in Europe. The results suggest that rhizoctonia fungi played a major functional role in carbon and nutrient supply for the orchids, while ectomycorrhizal fungi did not substantially contribute to the plants' carbon budget.
FUNCTIONAL ECOLOGY
(2023)
Article
Plant Sciences
Sofia I. F. Gomes, Miguel A. Fortuna, Jordi Bascompte, Vincent S. F. T. Merckx
Summary: This study investigates the interaction between mycoheterotrophic plants, which obtain carbon and nutrients from fungi, and arbuscular mycorrhizal networks. The research reveals that mycoheterotrophic plants interact with a subset of fungi detected in autotrophs, and fungi with a high overlap in autotrophic partners tend to interact with a similar set of mycoheterotrophs. The findings suggest that maintaining antagonistic interactions by targeting well-linked mutualistic fungi maximizes the carbon supply.
Article
Plant Sciences
Philipp Giesemann, Hanne N. Rasmussen, Gerhard Gebauer
Summary: About half of the chlorophyllous Paris-type species tested showed significant carbon enrichment from fungi, with seed plants exhibiting the highest carbon gain. These species are mainly herbaceous perennials thriving on shady forest ground.
Article
Plant Sciences
Kenji Suetsugu, Masahide Yamato, Jun Matsubayashi, Ichiro Tayasu
Summary: This study focused on the physiological ecology of the orchid Cypripedium debile, revealing the different ways in which green and albino individuals obtain nutrition from fungi. The results showed that green individuals have a higher proportion of carbon derived from fungi, which may contribute to the emergence of albino mutants.
Article
Plant Sciences
Kenji Suetsugu, Takashi F. Haraguchi, Akifumi S. Tanabe, Ichiro Tayasu
Summary: Research indicates that Oreorchis indica is partially mycoheterotrophic, mainly obtaining carbon from the mycorrhizal fungi Tomentella, rather than directly from the environment. This suggests that in the Orchidaceae family, full mycoheterotrophy likely evolved from partial mycoheterotrophy.
Article
Biotechnology & Applied Microbiology
Wenxia Ma, Fasi Wu, Jie Li, Qi Zhang, Xiaoju Yang, Ji-Dong Gu, Wanfu Wang, Huyuan Feng
Summary: The Mogao Grottoes, a UNESCO World Cultural Heritage site, have been affected by microbial colonization and deterioration of the wall paintings, resulting in the appearance of black spots and microbial biomasses. Next-generation sequencing and microscopy were used to identify the microbial community responsible for the biodeterioration. Rhodococcus and Ralstonia were found to be the dominant bacteria, while Aspergillus species were the predominant fungi in the black spots and microbial biomasses. Radioactive carbon-14 dating suggested that the original mural was painted during the Five Dynasties and Ten Kingdoms period, with repainting most likely occurring during the Song Dynasty. The outbreak of indigenous microbes on the wall paintings was likely initiated by earthen plaster preparation or heavy rainfall combined with a leaky roof.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Engineering, Civil
Theis Winter, Florian Einsiedl
Summary: The study uses C-14(DOC) and Kr-81 groundwater dating, stable water isotopes, noble gases, and out-diffusion experiments to reveal that the geothermal groundwater in the South German Molasse Basin consists of at least two sources - young and old groundwater components, with diffusion processes playing a key role in groundwater flow.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Delia Cristina Papp
Summary: This study analyzed groundwater samples from a gold deposit in Romania using carbon isotopes to estimate the age, recharge source, and flow velocities. The results showed that the groundwater is mainly recharged by local meteoric water, with old ages indicated by low per cent modern carbon values. The study also suggested inputs from late-glacial recharge in mine water and some springs.
CARPATHIAN JOURNAL OF EARTH AND ENVIRONMENTAL SCIENCES
(2021)
Article
Computer Science, Hardware & Architecture
Soheil Hosseini, Ignacio De Miguel, Noemi Merayo, Juan Carlos Aguado, Oscar Gonzalez De Dios, Ramon J. Duran Barroso
Summary: Space division multiplexing (SDM) and band division multiplexing (BDM) are considered promising technologies to increase the capacity of optical transport networks. This research focuses on the partial upgrade of fiber links to exploit the L-band, and demonstrates that it is a viable solution to significantly boost the supported traffic load in a cost-effective manner.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2023)
Article
Engineering, Electrical & Electronic
Kun Zhou, Sung-Kwun Oh, Jianlong Qiu
Summary: This study proposed a new ensemble fuzzy-radial basis function neural network based on a multi-feature fusion strategy, showing satisfactory performance in pattern recognition of partial discharge. By reducing dimensionality and extracting features, utilizing statistical characteristics, and designing a two-branch RBFNN based on fuzzy rules, the network's recognition capability was enhanced for PD datasets.
JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY
(2022)
Biographical-Item
Geochemistry & Geophysics
Christine Hatte
Review
Plant Sciences
Antoine Firmin, Marc-Andre Selosse, Christophe Dunand, Arnaud Elger
Summary: Aquatic Embryophytes play a crucial role in aquatic ecosystems and carbon is vital for biogeochemical processes. The phenomenon of mixotrophy, where autotrophs directly use exogenous organic carbon, is widespread among aquatic plants and is more common than previously believed.
TRENDS IN PLANT SCIENCE
(2022)
Review
Plant Sciences
Marc-Andre Selosse, Remi Petrolli, Maria Isabel Mujica, Liam Laurent, Benoit Perez-Lamarque, Tomas Figura, Amelia Bourceret, Hans Jacquemyn, Taiqiang Li, Jiangyun Gao, Julita Minasiewicz, Florent Martos
Summary: The roots of orchids associate with a variety of soil fungi, including a group called rhizoctonias that is most frequently found. However, there are also orchid species that target other fungal taxa with different phylogenetic positions and ecological traits. This study offers an evolutionary framework for understanding these symbiotic associations.
Article
Plant Sciences
Julita Minasiewicz, Emilia Krawczyk, Joanna Znaniecka, Lucie Vincenot, Ekaterina Zheleznaya, Joanna Korybut-Orlowska, Tiiu Kull, Marc-Andre Selosse
Summary: This study investigates the genetic structure of Epipogium aphyllum populations and their mycorrhizal specificity with fungal taxa. The study finds that the populations of E. aphyllum have high genetic diversity and low genetic differentiation. The genotypes of E. aphyllum do not significantly influence partner selection and there is no geographic structure in partner identity.
JOURNAL OF PLANT RESEARCH
(2022)
Article
Geochemistry & Geophysics
Michel Fontugne, Christine Hatte, Michel Jaudon
Summary: In 1991, a C-14 ss-counting installation with four proportional CO2 gas counters was tested at the Modane underground laboratory, reducing the muon flux to 4 muons per square meter and per day. By attenuating cosmic radiation and reducing variability, the background level of the counters was reduced by 65 to 85%.
Article
Geography, Physical
Cyril Castanet, Louise Purdue, Marc Teste, Aline Garnier, Anne- Lise Develle-Vincent, Fatima Mokadem, Christine Hatte, Caroline Gauthier, Philippe Lanos, Philippe Dufresne, Eva Lemonnier, Lydie Dussol, Ulien Hiquet, Philippe Nondedeo
Summary: This study examines the socio-environmental interactions during the Maya early Anthropocene in Mesoamerica, focusing on the dynamics of water and sediment in the Southern Maya Lowlands. The research reveals the impact of human and climate factors on the hydro-sedimentary fluctuations and highlights the long-term exploitation of water and soil resources in the region.
QUATERNARY SCIENCE REVIEWS
(2022)
Correction
Geosciences, Multidisciplinary
Lara Hughes-Allen, Frederic Bouchard, Christine Hatte, Hanno Meyer, Lyudmila A. Pestryakova, Bernhard Diekmann, Dmitry A. Subetto, Boris K. Biskaborn
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Plant Sciences
Remi Petrolli, Lucie Zinger, Benoit Perez-Lamarque, Geromine Collobert, Chantal Griveau, Thierry Pailler, Marc-Andre Selosse, Florent Martos
Summary: Tropical tree barks are colonized by mycorrhizal fungi, forming symbiotic relationships with nearby orchids. These networks may play a role in alleviating the stressful conditions in epiphytic habitats.
JOURNAL OF ECOLOGY
(2022)
Article
Geochemistry & Geophysics
T. J. Heaton, E. Bard, C. Bronk Ramsey, M. Butzin, C. Hatte, K. A. Hughen, P. Koehler, P. J. Reimer
Summary: The concentrations of radiocarbon (C-14) in the oceans differ from those in the atmosphere. Understanding these differences is important for dating samples from the marine environment and studying the carbon cycle. The Marine20 radiocarbon age calibration curve provides a global surface ocean record of radiocarbon from 55,000-0 cal yr BP, accounting for oceanic response to atmospheric C-14 variations and known changes in palaeoclimatic variables. Marine20 is an improvement over the previous Marine13 curve and includes guidelines for calibration and estimating regional oceanic C-14 variation.
Article
Multidisciplinary Sciences
Ludovic Henneron, Jerome Balesdent, Gael Alvarez, Pierre Barre, Francois Baudin, Isabelle Basile-Doelsch, Lauric Cecillon, Alejandro Fernandez-Martinez, Christine Hatte, Sebastien Fontaine
Summary: Soil carbon dynamics are strongly influenced by depth, with slower dynamics found in deeper layers. The main factors driving the depth-dependency of soil carbon dynamics are the bioenergetic constraints of decomposers, including low energy density and high activation energy of decomposition. Root-induced priming can accelerate the decomposition of deep soil carbon by providing sufficient energy supply. These findings are crucial for understanding and predicting carbon cycling and climate feedbacks.
NATURE COMMUNICATIONS
(2022)
Article
Plant Sciences
Zhi-Xiong Xu, Xin-Meng Zhu, Huachun Yin, Bo Li, Xiao-Jie Chen, Xu-Li Fan, Neng-Qi Li, Marc-Andre Selosse, Jiang-Yun Gao, Jia-Jia Han
Summary: Mycorrhizal symbiosis between fungi and plant roots is crucial for orchid seed germination and protocorm development. In this study, researchers discovered that an endophytic fungus called Serendipita indica can promote seed germination and protocorm development in several orchid species. The ADH gene in the mycorrhizal region plays a role in establishing this symbiotic relationship.
Article
Geochemistry & Geophysics
Christine Hatte, Maurice Arnold, Arnaud Dapoigny, Valerie Daux, Georgette Delibrias, Diane Du Boisgueheneuc, Michel Fontugne, Caroline Gauthier, Marie-Therese Guillier, Jeremy Jacob, Michel Jaudon, Evelyne Kaltnecker, Jacques Labeyrie, Claude Noury, Martine Paterne, Monique Pierre, Brian Phouybanhdyt, Jean-Jacques Poupeau, Jean-Francois Tannau, Francois Thil, Nadine Tisnerat-Laborde, Helene Valladas
Summary: The Laboratoire des Sciences du Climat et de l'Environnement (LSCE) has operated a radiocarbon dating laboratory for almost 70 years and evolved from ss-decay counting to accelerator mass spectrometry. A major upgrade in 2015 with the installation of MICADAS required adjustments in sample preparation to date smaller samples. This paper summarizes the sample cleaning procedures, chemical purification, and extraction treatment applied at LSCE, as well as reports on blank and reference materials for various sample types.
Article
Geochemistry & Geophysics
L. G. van der Sluis, A. Zazzo, O. Tombret, F. Thil, J-M Petillon
Summary: Museum collections are valuable for research, but the conservation history of some objects is not well-documented, causing difficulties for chemical analyses. In this study, the XAD resin treatment method was used to clean bone samples stored in museums, and its effectiveness was demonstrated through experiments.
Article
Environmental Sciences
Charlotte Prud'homme, Peter Fischer, Olaf Joeris, Sergey Gromov, Mathias Vinnepand, Christine Hatte, Hubert Vonhof, Olivier Moine, Andreas Voett, Kathryn E. Fitzsimmons
Summary: Ice core and marine archives provide detailed records of last glacial climate changes. In this study, using earthworm calcite granules, we quantified the warm season land-surface temperatures and precipitation changes in central Europe during the last glacial period. The results show that the Rhine Valley had cooler temperatures and reduced precipitation, and was strongly influenced by westerlies and North Atlantic climate forcing.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Soil Science
Solene Quero, Christine Hatte, Sophie Cornu, Adrien Duvivier, Nithavong Cam, Floriane Jamoteau, Daniel Borschneck, Isabelle Basile-Doelsch
Summary: This study investigates soil carbon dynamics in Arenosols, a soil type that represents 7% of the world's soils but has received little research attention. The results reveal that land use change from forest to vineyard leads to a significant reduction in soil organic carbon (SOC) stocks. However, implementing agricultural practices such as grassing or organic amendment applications could enhance the carbon storage potential of Arenosols.
