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https://www.readbyqxmd.com/read/28090266/reconstruction-of-a-composite-comparative-map-composed-of-ten-legume-genomes
#1
Chaeyoung Lee, Dongwoon Yu, Hong-Kyu Choi, Ryan W Kim
The Fabaceae (legume family) is the third largest and the second of agricultural importance among flowering plant groups. In this study, we report the reconstruction of a composite comparative map composed of ten legume genomes, including seven species from the galegoid clade (Medicago truncatula, Medicago sativa, Lens culinaris, Pisum sativum, Lotus japonicus, Cicer arietinum, Vicia faba) and three species from the phaseoloid clade (Vigna radiata, Phaseolus vulgaris, Glycine max). To accomplish this comparison, a total of 209 cross-species gene-derived markers were employed...
2017: Genes & Genomics
https://www.readbyqxmd.com/read/28089794/a-molecular-phylogeny-reveals-the-cuban-enigmatic-genus-behaimia-as-a-new-piece-in-the-brongniartieae-puzzle-of-papilionoid-legumes
#2
Luciano Paganucci de Queiroz, Wallace São Mateus, Alfonso Delgado-Salinas, Benjamin M Torke, Gwilym P Lewis, Óscar Dorado, Julie K Ardley, Martin F Wojciechowski, Domingos Cardoso
The papilionoid legume tribe Brongniartieae comprises a collection of 13 genera with disparate morphologies that were previously positioned in at least three remotely related tribes. The Brongniartieae displays a wide geographical disjunction between Australia and the New World and previous phylogenetic studies had provided conflicting results about the relationships between the American and Australian genera. We carry out phylogenetic analyses of (1) a plastid matK dataset extensively sampled across legumes to solve the enigmatic relationship of the Cuban-endemic monospecific genus Behaimia; and (2) multilocus datasets with focus on all genera ever referred to Brongniartieae...
January 9, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28089747/metabolic-engineering-of-a-diazotrophic-bacterium-improves-ammonium-release-and-biofertilization-of-plants-and-microalgae
#3
Rafael Ambrosio, Juan Cesar Federico Ortiz-Marquez, Leonardo Curatti
The biological nitrogen fixation carried out by some Bacteria and Archaea is one of the most attractive alternatives to synthetic nitrogen fertilizers. However, with the exception of the symbiotic rhizobia-legumes system, progress towards a more extensive realization of this goal has been slow. In this study we manipulated the endogenous regulation of both nitrogen fixation and assimilation in the aerobic bacterium Azotobacter vinelandii. Substituting an exogenously inducible promoter for the native promoter of glutamine synthetase produced conditional lethal mutant strains unable to grow diazotrophically in the absence of the inducer...
January 9, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/28088165/genomic-characterization-of-ensifer-aridi-a-proposed-new-species-of-nitrogen-fixing-rhizobium-recovered-from-asian-african-and-american-deserts
#4
Antoine Le Quéré, Nisha Tak, Hukam Singh Gehlot, Celine Lavire, Thibault Meyer, David Chapulliot, Sonam Rathi, Ilham Sakrouhi, Guadalupe Rocha, Marine Rohmer, Dany Severac, Abdelkarim Filali-Maltouf, Jose-Antonio Munive
BACKGROUND: Nitrogen fixing bacteria isolated from hot arid areas in Asia, Africa and America but from diverse leguminous plants have been recently identified as belonging to a possible new species of Ensifer (Sinorhizobium). In this study, 6 strains belonging to this new clade were compared with Ensifer species at the genome-wide level. Their capacities to utilize various carbon sources and to establish a symbiotic interaction with several leguminous plants were examined. RESULTS: Draft genomes of selected strains isolated from Morocco (Merzouga desert), Mexico (Baja California) as well as from India (Thar desert) were produced...
January 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28087663/evolution-and-structural-diversification-of-nictaba-like-lectin-genes-in-food-crops-with-a-focus-on-soybean-glycine-max
#5
Sofie Van Holle, Pierre Rougé, Els J M Van Damme
BACKGROUND AND AIMS: The Nictaba family groups all proteins that show homology to Nictaba, the tobacco lectin. So far, Nictaba and an Arabidopsis thaliana homologue have been shown to be implicated in the plant stress response. The availability of more than 50 sequenced plant genomes provided the opportunity for a genome-wide identification of Nictaba-like genes in 15 species, representing members of the Fabaceae, Poaceae, Solanaceae, Musaceae, Arecaceae, Malvaceae and Rubiaceae. Additionally, phylogenetic relationships between the different species were explored...
January 12, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28077199/legume-consumption-and-cvd-risk-a-systematic-review-and-meta-analysis
#6
Stefano Marventano, Maria Izquierdo Pulido, Claudia Sánchez-González, Justyna Godos, Attilio Speciani, Fabio Galvano, Giuseppe Grosso
OBJECTIVE: The aim of the present study was to systematically review and perform a meta-analysis of prospective cohort studies exploring the association between dietary legume consumption and CVD risk, including CHD and stroke. DESIGN: The PubMed and EMBASE databases were searched up to December 2015. A meta-analysis of the highest v. lowest (reference) category of dietary legume consumption was performed through random-effects models. RESULTS: Fourteen studies conducted on eleven cohorts and accounting for a total of 367 000 individuals and 18 475 cases of CVD (7451 CHD and 6336 stroke cases) were considered for the analyses...
February 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28077078/transcriptomic-evidence-for-the-control-of-soybean-root-isoflavonoid-content-by-regulation-of-overlapping-phenylpropanoid-pathways
#7
Mehran Dastmalchi, Patrick Chapman, Jaeju Yu, Ryan S Austin, Sangeeta Dhaubhadel
BACKGROUND: Isoflavonoids are a class of specialized metabolites found predominantly in legumes. They play a role in signaling for symbiosis with nitrogen-fixing bacteria and inhibiting pathogen infection. RESULTS: A transcriptomic approach using soybean cultivars with high (Conrad and AC Colombe) and low (AC Glengarry and Pagoda) root isoflavonoid content was used to find elements that underlie this variation. Two genes, encoding the flavonoid-metabolizing enzymes, flavonoid 3'-hydroxylase (GmF3'H) and dihydroflavonol 4-reductase (GmDFR), had lower expression levels in high isoflavonoid cultivars...
January 11, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28073951/nod-factors-potentiate-auxin-signaling-for-transcriptional-regulation-and-lateral-root-formation-in-medicago-truncatula
#8
Violaine Herrbach, Ximena Chirinos, David Rengel, Kokoévi Agbevenou, Rémy Vincent, Stéphanie Pateyron, Stéphanie Huguet, Sandrine Balzergue, Asher Pasha, Nicholas Provart, Clare Gough, Sandra Bensmihen
Nodulation (Nod) factors (NFs) are symbiotic molecules produced by rhizobia that are essential for establishment of the rhizobium-legume endosymbiosis. Purified NFs can stimulate lateral root formation (LRF) in Medicago truncatula, but little is known about the molecular mechanisms involved. Using a combination of reporter constructs, pharmacological and genetic approaches, we show that NFs act on early steps of LRF in M. truncatula, independently of the ethylene signaling pathway and of the cytokinin receptor MtCRE1, but in interaction with auxin...
January 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28071032/legume-seeds-and-cereal-grains-capacity-to-accumulate-iron-while-sprouting-in-order-to-obtain-food-fortificant
#9
Magdalena Zielińska-Dawidziak, Halina Staniek, Ewelina Król, Dorota Piasecka-Kwiatkowska, Tomasz Twardowski
BACKGROUND: Prepared sprouts, after culturing in a medium with an increased iron concentration, could become a beneficial food iron fortificant. However, the efficient iron accumulation depends on the plants genus, species and/or varieties. The aim of the study was to indicate the seeds or grains which accumulate iron most efficiently during the sprouting process. METHODS: Alfalfa, lentil, lupine and soybean seeds as well as wheat grains were sprouted in abiotic stress conditions induced by the excess of iron(II) in culture media...
July 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28068489/legumes-as-functional-ingredients-in-gluten-free-bakery-and-pasta-products
#10
Martina Foschia, Stefan W Horstmann, Elke K Arendt, Emanuele Zannini
The increasing demand of gluten-free food products from consumers has triggered food technologists to investigate a wide range of gluten-free ingredients from different sources to reproduce the unique network structure developed by gluten in a wheat-dough system. In recent times, the attention has been focused on novel application of legume flour or ingredients. The interest in this crop category is mainly attributed to their functional properties, such as solubility and water-binding capacity, which play an important role in gluten-free food formulation and processing...
January 4, 2017: Annual Review of Food Science and Technology
https://www.readbyqxmd.com/read/28068350/genome-wide-association-mapping-and-genomic-selection-for-alfalfa-medicago-sativa-forage-quality-traits
#11
Elisa Biazzi, Nelson Nazzicari, Luciano Pecetti, E Charles Brummer, Alberto Palmonari, Aldo Tava, Paolo Annicchiarico
Genetic progress for forage quality has been poor in alfalfa (Medicago sativa L.), the most-grown forage legume worldwide. This study aimed at exploring opportunities for marker-assisted selection (MAS) and genomic selection of forage quality traits based on breeding values of parent plants. Some 154 genotypes from a broadly-based reference population were genotyped by genotyping-by-sequencing (GBS), and phenotyped for leaf-to-stem ratio, leaf and stem contents of protein, neutral detergent fiber (NDF) and acid detergent lignin (ADL), and leaf and stem NDF digestibility after 24 hours (NDFD), of their dense-planted half-sib progenies in three growing conditions (summer harvest, full irrigation; summer harvest, suspended irrigation; autumn harvest)...
2017: PloS One
https://www.readbyqxmd.com/read/28067580/cis-regulatory-plethora-promoter-elements-directing-root-and-nodule-expression-are-conserved-between-arabidopsis-thaliana-and-medicago-truncatula
#12
Henk J Franssen, Olga Kulikova, Viola Willemsen, Renze Heidstra
Nodules are unique organs formed on roots of legumes by soil-borne bacteria, collectively known as rhizobium. Recently, we have shown that orthologs of the AINTEGUMENTA-like (AIL) AP2 transcription factors PLETHORA (PLT) 1 to 4, that redundantly regulate Arabidopsis thaliana root development are involved in root and nodule growth in Medicago truncatula. Hence, it is conceivable that rhizobium has co-opted these genes for nodule development. Whether this co-option requires the presence of specific cis-elements in the promoters and/or specialisation of PLT protein function is not clear...
January 9, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28065493/dietary-protein-sources-and-risk-for-incident-chronic-kidney-disease-results-from-the-atherosclerosis-risk-in-communities-aric-study
#13
Bernhard Haring, Elizabeth Selvin, Menglu Liang, Josef Coresh, Morgan E Grams, Natalia Petruski-Ivleva, Lyn M Steffen, Casey M Rebholz
OBJECTIVE: Dietary protein restriction is recommended for patients with moderate to severe renal insufficiency. Long-term data on the relationship between dietary protein sources and risk for incident kidney disease in individuals with normal kidney function are largely missing. This study aimed to assess the association between dietary protein sources and incident chronic kidney disease (CKD). DESIGN: Prospective cohort. SETTING: Atherosclerosis Risk in Communities study participants from 4 US communities...
January 5, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28063627/competition-between-rhizobia-under-different-environmental-conditions-affects-the-nodulation-of-a-legume
#14
Zhao Jun Ji, Hui Yan, Qing Guo Cui, En Tao Wang, Wen Feng Chen, Wen Xin Chen
Mutualistic symbiosis and nitrogen fixation of legume rhizobia play a key role in ecological environments. Although many different rhizobial species can form nodules with a specific legume, there is often a dominant microsymbiont, which has the highest nodule occupancy rates, and they are often known as the "most favorable rhizobia". Shifts in the most favorable rhizobia for a legume in different geographical regions or soil types are not well understood. Therefore, in order to explore the shift model, an experiment was designed using successive inoculations of rhizobia on one legume...
December 27, 2016: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28062461/diverse-bacteria-affiliated-with-the-genera-microvirga-phyllobacterium-and-bradyrhizobium-nodulate-lupinus-micranthus-growing-in-soils-of-northern-tunisia
#15
Abdelhakim Msaddak, David Durán, Mokhtar Rejili, Mohamed Mars, Tomás Ruiz-Argüeso, Juan Imperial, José Palacios, Luis Rey
: The genetic diversity of bacterial populations nodulating Lupinus micranthus in five geographical sites from Northern Tunisia was examined. Phylogenetic analyses of fifty isolates based on recA and gyrB gene partial sequences grouped strains in seven clusters, five of which belong to genus Bradyrhizobium (28 isolates), one to Phyllobacterium (2 isolates), and one, remarkably, to Microvirga (20 isolates). The largest Bradyrhizobium cluster (17 isolates) grouped with the B. lupini species and the other five clusters were close to different, recently defined Bradyrhizobium species...
January 6, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28057894/validating-genome-wide-association-candidates-through-quantitative-variation-in-nodulation
#16
Shaun J Curtin, Peter Tiffin, Joseph Guhlin, Diana I Trujillo, Liana T Burghardt, Paul Atkins, Nicholas J Baltes, Roxanne Denny, Daniel F Voytas, Robert M Stupar, Nevin Dale Young
Genome wide association (GWA) studies offer the opportunity to identify genes that contribute to naturally occurring variation in quantitative traits. However, GWA relies exclusively on statistical association, so functional validation is necessary to make strong claims about gene function. We used a combination of gene-disruption platforms (Tnt1 retro-transposons, hairpin RNA-interference constructs, and CRISPR/Cas9 nucleases) together with randomized, well-replicated experiments to evaluate the function of genes that an earlier GWAS in Medicago truncatula had identified as candidates contributing to variation in the symbiosis between legumes and rhizobia...
January 5, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28054497/the-lipopolysaccharide-lipid-a-long-chain-fatty-acid-is-important-for-rhizobium-leguminosarum-growth-and-stress-adaptation-in-free-living-and-nodule-environments
#17
Dianna V Bourassa, Elmar Kannenberg, Janine Sherrier, Richard Jeffrey Buhr, Russell Carlson
Rhizobium bacteria live in soil and plant environments, are capable of inducing symbiotic nodules on legumes, invade these nodules, and develop into bacteroids that fix atmospheric nitrogen into ammonia. Rhizobial lipopolysaccharide (LPS) is anchored in the bacterial outer membrane through a specialized lipid A containing a very long chain fatty acid (VLCFA). VLCFA function for rhizobial growth in soil and plant environments is not well understood. Two genes, acpXL and lpxXL, encoding acyl carrier protein and acyltransferase, are among the six genes required for biosynthesis and transfer of VLCFA to lipid A...
January 5, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28052457/changes-in-in%C3%A2-vitro-ruminal-and-post-ruminal-degradation-of-tropical-tannin-rich-legumes-due-to-varying-levels-of-polyethylene-glycol
#18
M M Knowles, M L Pabón, H D Hess, J E Carulla
We evaluated the effects of tannins from Flemingia macrophylla (CIAT 17403) and Calliandra calothyrsus (San Ramón CIAT 22310 and Patulul CIAT 22316) on in vitro ruminal and post-ruminal dry matter and apparent protein degradation. For each tannin source (legumes), different dosages of polyethylene glycol (PEG) (8000 Da) in McDougall buffer were added to achieve ratios of 0:3, 1:3, 2:3 and 3:3 PEG:condensed tannin (CT). Ruminal fluid mixed with McDougall buffer (1:4) was added to tubes containing only legume foliage (control) or PEG-treated legume foliage...
January 4, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28052433/diverse-functions-of-multidrug-and-toxin-extrusion-mate-transporters-in-citric-acid-efflux-and-metal-homeostasis-in-medicago-truncatula
#19
Junjie Wang, Qiuqiang Hou, Penghui Li, Lina Yang, Xuecheng Sun, Vagner A Benedito, Jiangqi Wen, Beibei Chen, Kirankumar S Mysore, Jian Zhao
The MATE transporter family comprises 70 members in the Medicago truncatula genome, and they play seemingly important, yet mostly uncharacterized, physiological functions. Here, we employed bioinformatics and molecular genetics to identify and characterize MATE transporters involved in citric acid export, Al(3+) tolerance and Fe translocation. MtMATE69 is a citric acid transporter induced by Fe-deficiency. Overexpression of MtMATE69 in hairy roots altered Fe homeostasis and hormone levels under Fe-deficient or Fe-oversupplied conditions...
January 4, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28052395/herbivores-sculpt-leaf-traits-differently-in-grasslands-depending-on-life-form-and-land-use-histories
#20
Jennifer Firn, Martin Schütz, Huong Nguyen, Anita C Risch
Vertebrate and invertebrate herbivores alter plant communities directly by selectively consuming plant species; and indirectly by inducing morphological and physiological changes to plant traits that provide competitive or survivorship advantages to some life forms over others. Progressively excluding aboveground herbivore communities (ungulates, medium and small sized mammals, invertebrates) over five growing seasons, we explored how leaf morphology (specific leaf area or SLA) and nutrition (nitrogen, carbon, phosphorous, potassium, sodium, and calcium) of different plant life forms (forbs, legumes, grasses, sedges) correlated with their dominance...
January 2017: Ecology
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