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  • 1. Aubry, Emilie
    et al.
    Dinant, Sylvie
    Vilaine, Francoise
    Bellini, C
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
    Le Hir, Rozenn
    Lateral Transport of Organic and Inorganic Solutes2019Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 8, nr 1, artikel-id 20Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Organic (e.g., sugars and amino acids) and inorganic (e.g., K+, Na+, PO42−, and SO42−) solutes are transported long-distance throughout plants. Lateral movement of these compounds between the xylem and the phloem, and vice versa, has also been reported in several plant species since the 1930s, and is believed to be important in the overall resource allocation. Studies of Arabidopsis thaliana have provided us with a better knowledge of the anatomical framework in which the lateral transport takes place, and have highlighted the role of specialized vascular and perivascular cells as an interface for solute exchanges. Important breakthroughs have also been made, mainly in Arabidopsis, in identifying some of the proteins involved in the cell-to-cell translocation of solutes, most notably a range of plasma membrane transporters that act in different cell types. Finally, in the future, state-of-art imaging techniques should help to better characterize the lateral transport of these compounds on a cellular level. This review brings the lateral transport of sugars and inorganic solutes back into focus and highlights its importance in terms of our overall understanding of plant resource allocation.

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  • 2.
    Avila Clasen, Lina
    et al.
    Department of Biology, University of Copenhagen, Copenhagen, Denmark.
    Permin, Aya
    Department of Biology, University of Copenhagen, Copenhagen, Denmark.
    Horwath, Aline B.
    Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, United Kingdom.
    Metcalfe, Daniel B.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden.
    Rousk, Kathrin
    Department of Biology, University of Copenhagen, Copenhagen, Denmark.
    Do nitrogen and phosphorus additions affect nitrogen fixation associated with tropical mosses?2023Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 12, nr 7, artikel-id 1443Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Tropical cloud forests are characterized by abundant and biodiverse mosses which grow epiphytically as well as on the ground. Nitrogen (N)-fixing cyanobacteria live in association with most mosses, and contribute greatly to the N pool via biological nitrogen fixation (BNF). However, the availability of nutrients, especially N and phosphorus (P), can influence BNF rates drastically. To evaluate the effects of increased N and P availability on BNF in mosses, we conducted a laboratory experiment where we added N and P, in isolation and combined, to three mosses (Campylopus sp., Dicranum sp. and Thuidium peruvianum) collected from a cloud forest in Peru. Our results show that N addition almost completely inhibited BNF within a day, whereas P addition caused variable results across moss species. Low N2 fixation rates were observed in Campylopus sp. across the experiment. BNF in Dicranum sp. was decreased by all nutrients, while P additions seemed to promote BNF in T. peruvianum. Hence, each of the three mosses contributes distinctively to the ecosystem N pool depending on nutrient availability. Moreover, increased N input will likely significantly decrease BNF associated with mosses also in tropical cloud forests, thereby limiting N input to these ecosystems via the moss-cyanobacteria pathway.

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  • 3.
    Bag, Pushan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
    Light harvesting in fluctuating environments: Evolution and function of antenna proteins across photosynthetic lineage2021Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 10, nr 6, artikel-id 1184Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Photosynthesis is the major natural process that can harvest and harness solar energy into chemical energy. Photosynthesis is performed by a vast number of organisms from single cellular bacteria to higher plants and to make the process efficient, all photosynthetic organisms possess a special type of pigment protein complex(es) that is (are) capable of trapping light energy, known as photosynthetic light-harvesting antennae. From an evolutionary point of view, simpler (unicellular) organisms typically have a simple antenna, whereas higher plants possess complex antenna systems. The higher complexity of the antenna systems provides efficient fine tuning of photosynthesis. This relationship between the complexity of the antenna and the increasing complexity of the organism is mainly related to the remarkable acclimation capability of complex organisms under fluctuating environmental conditions. These antenna complexes not only harvest light, but also provide photoprotection under fluctuating light conditions. In this review, the evolution, structure, and function of different antenna complexes, from single cellular organisms to higher plants, are discussed in the context of the ability to acclimate and adapt to cope under fluctuating environmental conditions.

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  • 4.
    Bru, Pierrick
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik.
    Nanda, Sanchali
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik.
    Malnoë, Alizée
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik.
    A Genetic Screen to Identify New Molecular Players Involved in Photoprotection qH in Arabidopsis thaliana2020Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 9, nr 11, artikel-id 1565Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Photosynthesis is a biological process which converts light energy into chemical energy that is used in the Calvin–Benson cycle to produce organic compounds. An excess of light can induce damage to the photosynthetic machinery. Therefore, plants have evolved photoprotective mechanisms such as non-photochemical quenching (NPQ). To focus molecular insights on slowly relaxing NPQ processes in Arabidopsis thaliana, previously, a qE-deficient line—the PsbS mutant—was mutagenized and a mutant with high and slowly relaxing NPQ was isolated. The mutated gene was named suppressor of quenching 1, or SOQ1, to describe its function. Indeed, when present, SOQ1 negatively regulates or suppresses a form of antenna NPQ that is slow to relax and is photoprotective. We have now termed this component qH and identified the plastid lipocalin, LCNP, as the effector for this energy dissipation mode to occur. Recently, we found that the relaxation of qH1, ROQH1, protein is required to turn off qH. The aim of this study is to identify new molecular players involved in photoprotection qH by a whole genome sequencing approach of chemically mutagenized Arabidopsis thaliana. We conducted an EMS-mutagenesis on the soq1 npq4 double mutant and used chlorophyll fluorescence imaging to screen for suppressors and enhancers of qH. Out of 22,000 mutagenized plants screened, the molecular players cited above were found using a mapping-by-sequencing approach. Here, we describe the phenotypic characterization of the other mutants isolated from this genetic screen and an additional 8000 plants screened. We have classified them in several classes based on their fluorescence parameters, NPQ kinetics, and pigment content. A high-throughput whole genome sequencing approach on 65 mutants will identify the causal mutations thanks to allelic mutations from having reached saturation of the genetic screen. The candidate genes could be involved in the formation or maintenance of quenching sites for qH, in the regulation of qH at the transcriptional level, or be part of the quenching site itself. 

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  • 5.
    Islam, Md Mazharul
    et al.
    Department of Horticultural Science, Kyungpook National University, Daegu, South Korea; Research and Development, Horticultural Crop Breeding, Quality Feeds Limited, Dhaka, Bangladesh.
    Deepo, Deen Mohammad
    Department of Horticultural Science, Kyungpook National University, Daegu, South Korea.
    Nasif, Saifullah Omar
    Global Centre for Environmental Remediation (GCER), College of Engineering Science and Environment, The University of Newcastle, NSW, Newcastle, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, ATC Building, NSW, Newcastle, Australia.
    Siddique, Abu Bakar
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
    Hassan, Oliul
    Department of Ecology and Environmental System, College of Ecology and Environmental Sciences, Kyungpook National University, Sangju, South Korea.
    Siddique, Abu Bakar
    Department of Plant Biology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
    Paul, Narayan Chandra
    Kumho Life Science Laboratory, Department of Integrative Food Bioscience and Biotechnology, Chonnam National University, Gwangju, South Korea.
    Cytogenetics and consequences of polyploidization on different biotic-abiotic stress tolerance and the potential mechanisms involved2022Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 11, nr 20, artikel-id 2684Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The application of polyploidy in sustainable agriculture has already brought much appreciation among researchers. Polyploidy may occur naturally or can be induced in the laboratory using chemical or gaseous agents and results in complete chromosome nondisjunction. This comprehensive review described the potential of polyploidization on plants, especially its role in crop improvement for enhanced production and host-plant resistance development against pests and diseases. An in-depth investigation on techniques used in the induction of polyploidy, cytogenetic evaluation methods of different ploidy levels, application, and current research trends is also presented. Ongoing research has mainly aimed to bring the recurrence in polyploidy, which is usually detected by flow cytometry, chromosome counting, and cytogenetic techniques such as fluorescent in situ hybridization (FISH) and genomic in situ hybridization (GISH). Polyploidy can bring about positive consequences in the growth and yield attributes of crops, making them more tolerant to abiotic and biotic stresses. However, the unexpected change in chromosome set and lack of knowledge on the mechanism of stress alleviation is hindering the application of polyploidy on a large scale. Moreover, a lack of cost–benefit analysis and knowledge gaps on the socio-economic implication are predominant. Further research on polyploidy coupling with modern genomic technologies will help to bring real-world market prospects in the era of changing climate. This review on polyploidy provides a solid foundation to do next-generation research on crop improvement.

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  • 6.
    Kleczkowski, Leszek A.
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
    Decker, Daniel
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).
    Effects of Magnesium, Pyrophosphate and Phosphonates on Pyrophosphorolytic Reaction of UDP-Glucose Pyrophosphorylase2022Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 11, nr 12, artikel-id 1611Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    UDP-glucose pyrophosphorylase (UGPase) carries a freely reversible reaction, using glucose-1-P and UTP to produce UDP-glucose (UDPG) and pyrophosphate (PPi ), with UDPG being essential for glycosylation reactions in all organisms including, e.g., synthesis of sucrose, cellulose and glycoproteins. In the present study, we found that free magnesium (Mg2+) had profound effects on the reverse reaction of purified barley UGPase, and was absolutely required for its activity, with an apparent Km of 0.13 mM. More detailed analyses with varied concentrations of MgPPi allowed us to conclude that it is the MgPPi complex which serves as true substrate for UGPase in its reverse reaction, with an apparent Km of 0.06 mM. Free PPi was an inhibitor in this reaction. Given the key role of PPi in the UGPase reaction, we have also tested possible effects of phosphonates, which are analogs of PPi and phosphate (Pi ). Clodronate and etidronate (PPi analogs) had little or no effect on UGPase activity, whereas fosetyl-Al (Pi analog), a known fungicide, acted as effective near-competitive inhibitor versus PPi, with Ki of 0.15 mM. The data are discussed with respect to the role of magnesium in the UGPase reaction and elucidating the use of inhibitors in studies on cellular function of UGPase and related enzymes.

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  • 7.
    Ragazzola, Federica
    et al.
    Institute of Marine Science, University of Portsmouth, Portsmouth, UK.
    Kolzenburg, Regina
    Institute of Marine Science, University of Portsmouth, Portsmouth, UK.
    Zekonyte, Jurgita
    School of Engineering, University of Portsmouth, Portsmouth, UK.
    Teichert, Sebastian
    GeoZentrum Nordbayern, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.
    Jiang, Chulin
    School of Engineering, University of Portsmouth, Portsmouth, UK.
    Žuljević, Ante
    Institute of Oceanography and Fisheries, Split, Croatia.
    Caragnano, Annalisa
    Department of Life Sciences, University of Trieste, Trieste, Italy.
    Falace, Annalisa
    Department of Life Sciences, University of Trieste, Trieste, Italy.
    Structural and elemental analysis of the freshwater, low-Mg calcite coralline alga Pneophyllum cetinaensis2020Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 9, nr 9, artikel-id 1089Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Coralline algae are one of the most diversified groups of red algae and represent a major component of marine benthic habitats from the poles to the tropics. This group was believed to be exclusively marine until 2016, when the first freshwater coralline algae Pneophyllum cetinaensis was discovered in the Cetina River, southern Croatia. While several studies investigated the element compositions of marine coralline algal thalli, no information is yet available for the freshwater species. Using XRD, LA-ICP-MS and nano indentation, this study presents the first living low-Mg calcite coralline algae with Mg concentrations ten times lower than is common for the average marine species. Despite the lower Mg concentrations, hardness and elastic modulus (1.71 ± 1.58 GPa and 29.7 ± 18.0 GPa, respectively) are in the same range as other marine coralline algae, possibly due to other biogenic impurities. When compared to marine species, Ba/Ca values were unusually low, even though Ba concentrations are generally higher in rivers than in seawater. These low values might be linked to different physical and chemical characteristics of the Cetina River.

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  • 8.
    Sofo, Adriano
    et al.
    Department of European and Mediterranean Cultures: Architecture, Environment and Cultural Heritage (DiCEM), Università degli Studi della Basilicata, Matera, Italy.
    Khanghahi, Mohammad Yaghoubi
    Department of Soil, Plant and Food Sciences, Università degli Studi di Bari Aldo Moro, Bari, Italy.
    Curci, Maddalena
    Department of Soil, Plant and Food Sciences, Università degli Studi di Bari Aldo Moro, Bari, Italy.
    Reyes, Francesco
    Department of Life Sciences, Università degli Studi di Modena e Reggio Emilia, Reggio Emilia, Italy.
    Briones, Maria J. I.
    Department of Ecology and Animal Biology, Universidade de Vigo, Pontevedra, Spain.
    Sarneel, Judith M.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
    Cardinale, Domenico
    Independent Researcher, Matera, Italy.
    Crecchio, Carmine
    Department of Soil, Plant and Food Sciences, Università degli Studi di Bari Aldo Moro, Bari, Italy.
    Earthworm-driven changes in soil chemico-physical properties, soil bacterial microbiota, tree/tea litter decomposition, and plant growth in a mesocosm experiment with two plant species2023Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 12, nr 6, artikel-id 1216Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Earthworms and soil microorganisms contribute to soil health, quality, and fertility, but their importance in agricultural soils is often underestimated. This study aims at examining whether and to what extent the presence of earthworms (Eisenia sp.) affected the (a) soil bacterial community composition, (b) litter decomposition, and (c) plant growth (Brassica oleracea L., broccoli; Vicia faba L., faba bean). We performed a mesocosm experiment in which plants were grown outdoors for four months with or without earthworms. Soil bacterial community structure was evaluated by a 16S rRNA-based metabarcoding approach. Litter decomposition rates were determined by using the tea bag index (TBI) and litter bags (olive residues). Earthworm numbers almost doubled throughout the experimental period. Independently of the plant species, earthworm presence had a significant impact on the structure of soil bacterial community, in terms of enhanced α- and β-diversity (especially that of Proteobacteria, Bacteroidota, Myxococcota, and Verrucomicrobia) and increased 16S rRNA gene abundance (+89% in broccoli and +223% in faba bean). Microbial decomposition (TBI) was enhanced in the treatments with earthworms, and showed a significantly higher decomposition rate constant (kTBI) and a lower stabilization factor (STBI), whereas decomposition in the litter bags (dlitter) increased by about 6% in broccoli and 5% in faba bean. Earthworms significantly enhanced root growth (in terms of total length and fresh weight) of both plant species. Our results show the strong influence of earthworms and crop identity in shaping soil chemico-physical properties, soil bacterial community, litter decomposition and plant growth. These findings could be used for developing nature-based solutions that ensure the long-term biological sustainability of soil agro- and natural ecosystems.

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  • 9.
    Sulaiman, Naji
    et al.
    University of Gastronomic Sciences, Piazza Vittorio Emanuele II 9, Pollenzo, Italy.
    Salehi, Farzad
    Department of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice, Via Torino 155, Venezia, Mestre, Italy.
    Prakofjewa, Julia
    Department of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice, Via Torino 155, Venezia, Mestre, Italy.
    Cavalleri, Sofia Anna Enrica
    RISTOLAB s.r.l., Via Caracciolo 88, Pollica, Italy; World Food Forum Young Scientists Group (WFF YSG), Rome, Italy.
    Ahmed, Hiwa M.
    Bakrajo Technical Institute, Sulaimani Polytechnic University, Kurdistan Region, Slemani, Iraq.
    Mattalia, Giulia
    Institut de Ciència i Tecnología Ambientals (ICTA-UAB), Universitat Autònoma de Barcelona, Barcelona, Spain.
    Rastegar, Azad
    HKS Herbarium, Kurdistan Agricultural and Natural Resources Research and Education Center, AREEO, Sanandaj, Iran.
    Maghsudi, Manijeh
    Department of Anthropology, Tehran University, Tehran, Iran.
    Amin, Hawraz M.
    Department of Chemistry, University of Pavia, Via Taramelli 12, Pavia, Italy; Department of Chemistry, College of Science, Salahaddin University-Erbil, Erbil, Iraq.
    Rasti, Ahmad
    Department of Environmental Sciences and Policies, University of Milan, Via Celoria 2, Milan, Italy.
    Hosseini, Seyed Hamzeh
    Department of Biology, Faculty of Science, University of Jiroft, Jiroft, Iran.
    Ghorbani, Abdolbaset
    Umeå universitet, Lärarhögskolan vid Umeå universitet (LH).
    Pieroni, Andrea
    University of Gastronomic Sciences, Piazza Vittorio Emanuele II 9, Pollenzo, Italy; Department of Medical Analysis, Tishk International University, Erbil, Iraq.
    Sõukand, Renata
    Department of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice, Via Torino 155, Venezia, Mestre, Italy.
    Cultural vs. state borders: plant foraging by Hawraman and Mukriyan kurds in western Iran2024Ingår i: PLANTS, E-ISSN 2223-7747, Vol. 13, nr 7, artikel-id 1048Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Plant foraging is a millennia-old activity still practiced by many people in the Middle East, particularly in the Fertile Crescent region, where several socioeconomic, ecological, and cultural factors shape this practice. This study seeks to understand the drivers of plant foraging in this complex region characterized by highly diverse linguistic, religious, and cultural groups. Our study aims to document the wild plants used by Kurds in Western Iran, identify similarities and differences among Hawraman and Mukriyan Kurdish groups in Iran, and compare our findings with a previous study on the Hawramani in Iraq. Forty-three semi-structured in-depth interviews were conducted in Kurdish villages of Western Iran. The results revealed the use of 44 wild food plant taxa, their preparation, and culinary uses. Among the reported taxa, 28 plant taxa were used by Mukriyani, and 33 by Hawramani. The study revealed a significant difference between the Hawraman and Mukriyan regions in Iran, whereas there is a high similarity between Hawramani Kurds in Iran and Iraq. We found that the invisible cultural border carries more weight than political divisions, and this calls for a paradigm shift in how we perceive and map the distribution of ethnobotanical knowledge.

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