A5065825834- Legume Nitrogen Fixing Symbiosis
- Plant nutrient uptake and metabolism
- Mycorrhizal Fungi and Plant Interactions
- Plant Parasitism and Resistance
- Plant Disease Resistance and Genetics
- Microbial Natural Products and Biosynthesis
- Rice Cultivation and Yield Improvement
- Microbial Community Ecology and Physiology
- Crop Yield and Soil Fertility
- Agronomic Practices and Intercropping Systems
- Ammonia Synthesis and Nitrogen Reduction
- Plant and animal studies
- Soil Management and Crop Yield
- Genomics and Phylogenetic Studies
Stockholm University
2019-2024
Swedish University of Agricultural Sciences
2023-2024
Abstract Frankia strains induce the formation of nitrogen-fixing nodules on roots actinorhizal plants. Phylogenetically, can be grouped in four clusters. The earliest divergent cluster, cluster-2, has a particularly wide host range. analysis cluster-2 been hampered by fact that with two exceptions, they could never cultured. In this study, 12 Frankia-enriched metagenomes or strain assemblages were sequenced based seven inoculum sources. Sequences obtained via DNA isolated from whole compared...
Abstract Roots play a pivotal role in the adaption of plant to its environment, with different root traits adapting stresses. The environment affects Root System Architecture (RSA), but genetic factors determine what extent, and whether stress brought about by extreme environmental conditions is detrimental specific crop. This study aimed identify differences winter wheat RSA caused cultivation region practice, form preceding crop (precrop), if modern cultivars used Sweden differ their...
Abstract It is currently assumed that around 100 million years ago, the common ancestor to Fabales, Fagales, Rosales and Cucurbitales in Gondwana, developed a root nodule symbiosis with nitrogen-fixing bacterium. The symbiotic trait evolved first Frankia cluster-2; thus, strains belonging this cluster are best extant representatives of original symbiont. Most cluster-2 could not be cultured date, except for coriariae, therefore many aspects still elusive. Based on phylogenetics...
Coriariaceae are a small plant family of 14-17 species and subspecies that currently have global but disjunct distribution. All can form root nodules in symbiosis with diazotrophic Frankia cluster-2 strains, which the earliest divergent symbiotic clade within this bacterial genus. Studies on mostly focused strains occurring northern hemisphere. Except for one strain from Papua New Guinea, namely Candidatus meridionalis Cppng1, no complete genome associated Coriaria southern hemisphere has...
Aims Root system architecture (RSA) plays an important role in the plant’s ability to sustain yield under abiotic stresses such as drought. Preceding crops (precrops) can affect of proceeding crop, partially by affecting RSA. This experiment aims explore interactions between precrop identity, crop genotype and drought at early growth stages. Methods Rhizotrons, sized 60 × 80 3.5 cm, were used assess root two winter wheat (Triticum aestivum L.) genotypes, using precrop-treated soil around...
An actinobacterial strain, CMB-FB, was isolated from surface-sterilized root nodules of a Coriaria intermedia plant growing along Halsema Highway in the province Benguet (Luzon, Philippines). The 16S rRNA gene sequence CMB-FB showed high similarity to those type strains Streptomyces rishiriensis (99.4 %), humidus (99.1 cacaoi subsp. asoensis (99.0 and phaeofaciens (98.6 %). major menaquinones were composed MK-9(H4), MK-9(H6) MK-9(H8), there minor contribution MK-9(H10). polar lipid profile...
Nitrogen-fixing Actinobacteria of the genus Frankia can be subdivided into four phylogenetically distinct clades; members clusters one to three engage in nitrogen-fixing root nodule symbioses with actinorhizal plants. Mur enzymes are responsible for biosynthesis peptidoglycan layer bacteria. The ligases, MurC, MurD, MurE, and MurF, catalyse addition a short polypeptide UDP-N-acetylmuramic acid. strains cluster-2 cluster-3 contain two copies murC, while cluster-1 cluster-4 only one....
Abstract Uptake hydrogenase (Hup) recycles H2 formed by nitrogenase during nitrogen fixation, thereby preserving energy. Among root nodule bacteria, most rhizobial strains examined are Hup−, while only one Hup− Frankia inoculum had been identified. Previous analyses led to the identification of two different [NiFe] syntons. We analysed distribution types in genomes species. Our results show that can contain four syntons representing groups 1f, 1h, 2a and 3b according Søndergaard et al....
Abstract Frankia cluster-2 strains are diazotrophs that engage in root nodule symbiosis with actinorhizal plants of the Cucurbitales and Rosales. Previous studies have shown an assimilated nitrogen source, presumably arginine, is exported to host nodules Datisca glomerata (Cucurbitales), while a different metabolite Ceanothus thyrsiflorus (Rosales). To investigate if form commonly by strains, which would be Ceanothus, we analysed gene expression levels, profiles, enzyme activities nodules....
Microorganisms, such as bacteria and fungi, can live together with plants in a tight relationship where they help each other to provide nutrients. Some groups of turn nitrogen, an essential element, from gas the atmosphere into form that use. In return, carbon bacteria. This special is called symbiosis. Researchers try understand why some interact these helpful others do not. They this by looking at how symbiotic was formed it evolved over long period time several million years. If we use...
Summary Frankia cluster-2 are diazotrophs that engage in root nodule symbiosis with host plants of the Cucurbitales and Rosales. They rarely found soil absence their hosts. Previous studies have shown an assimilated nitrogen source, presumable arginine, is exported to nodules Datisca glomerata (Cucurbitales), but not Ceanothus thyrsiflorus (Rosales). To investigate if form commonly by strains, which source would then be C. , gene expression levels, metabolite profiles enzyme activities were...