ABSTRACT Plant-beneficial microorganisms are gaining importance for sustainable plant production and phytosanitary practices. Yet there is a lack of computational approaches targeting bacterial traits associated with growth-promotion (PGP), which hinders the in-silico identification, comparison, selection phytostimulatory strains. To address this problem, we have developed new web resource PLaBAse (v1.01, http://plabase.informatik.uni-tuebingen.de/pb/plabase.php ), provides number services,...

Botrytis cinerea, which causes gray-mold rot, attacks a wide range of plant species. To understand the infection process, role putative transcriptional regulator, BcReg1 (regulator 1), in pathogenicity was studied. This regulator shows similarity to morphological switch regulators Candida albicans Wor1 and Histoplasma capsulatum Ryp1. Gene knock-out complementation studies revealed that bcreg1 is required for pathogenicity. The mutant able penetrate tissue but not cause necrotic lesions. In...

Summary Epichloë festucae forms a mutualistic symbiotic association with Lolium perenne . This biotrophic fungus systemically colonizes the intercellular spaces of aerial tissues to form an endophytic hyphal network. E. also grows as epiphyte, but mechanism for leaf surface colonization is not known. Here we identify appressorium‐like structure, which call expressorium that allows hyphae penetrate cuticle from inside establish epiphytic net on leaf. We used combination scanning electron,...

Transcriptome analysis is increasingly being used to study the evolutionary origins and ecology of non-model plants. One issue for both transcriptome assembly differential gene expression analyses common occurrence in plants hybridisation whole genome duplication (WGD) hybridization resulting allopolyploidy. The divergence duplicated genes following WGD creates near identical homeologues that can be problematic de novo also reference based protocols use short reads (35 - 100 bp).Here we...

Epichloë festucae is a mutualistic symbiont that systemically colonizes the intercellular spaces of Lolium perenne leaves to form highly structured and interconnected hyphal network. In an Agrobacterium tumefaciens T-DNA forward genetic screen, we identified mutant TM1066 had severe host interaction phenotype, causing stunting premature senescence host. Molecular analysis revealed mutation responsible for this phenotype was in cell-wall integrity (CWI) mitogen-activated protein kinase...

The global market for biosupplements is expected to grow by 14 percent between 2014 and 2019 as a consequence of the proven benefits on crop yields, soil fertility, fertilizer efficiency. One important segment plant growth-promoting bacteria (PGPB). Although many potential PGPB have been discovered, suitable biotechnological processing shelf-life stability are challenges overcome their successful use biosupplements. Here, Gram-negative strain Kosakonia radicincitans DSM<mml:math...

The recent worldwide discovery of plant growth-promoting (PGP) Kosakonia radicincitans in a large variety crop plants suggests that this species confers significant influence on plants, both terms yield increase and product quality improvement. We provide comparative genome analysis which helps to unravel the genetic basis for K. radicincitans' motility, competitiveness capacities. discovered carries multiple copies complex gene clusters, among them two flagellar systems three type VI...

Salinity and phosphorus (P) deficiency are among the most serious soil factors constraining crop productivity. A proposed strategy for alleviating these stresses is supporting plants by inoculation with growth-promoting rhizobacteria (PGPR). Here, a comparison of ability two maize composite F1 hybrid varieties to tolerate P in either saline or non-saline environment showed that uptake nutrients all four entries was significantly reduced imposition both salinity deficiency, their growth...

Gram-negative bacterial endophytes have attracted research interest caused by their advantageous over epiphytic bacteria in plant nutrition and protection. However, on these typically has deficiencies concerning the role of cultivation pre-formulation strategies further colonisation capabilities. Besides, influence conditions osmotic stress within phosphate solubilising ability not yet been addressed. By pre-conditioning cells with an osmoadaptation a hydroxyectoine accumulation approach,...

Root nodules of legume plants are primarily inhabited by rhizobial nitrogen-fixing bacteria. Here, we propose two new Rhizobiales species isolated from root common sainfoin (Onobrychis viciifolia), as shown core-gene phylogeny, overall genome relatedness indices, and pan-genome analysis. Mesorhizobium onobrychidis sp. nov. actively induces achieves atmospheric nitrogen carbon dioxide fixation. This appears to be depleted in motility genes is enriched for direct effects on plant growth...

Trichomes are important regulators of leaf radiation absorptance and thus modulate the carbon, water energy balance pubescent plants. This study assessed hair characteristics optical properties four species alpine Pachycladon (Brassicaceae). Two exhibited different trichome morphological but only small variations in density. These structural differences explained much variation between species. stellatum highest proportion dendritic trichomes (87%), with forked simple more common other high...

Plants are often challenged by multiple abiotic stresses simultaneously. The inoculation of beneficial bacteria is known to enhance plant growth under these stresses, such as phosphorus starvation or salt stress. Here, for the first time, we assessed efficiency selected bacterial strains in improving tomato better cope with double salty and P-deficient soil conditions. Six Arthrobacter Bacillus different reservoirs growth-promoting traits were tested vitro their abilities tolerate 2–16%...

Abstract Kosakonia radicincitans is a species within the new genus . Many strains of this have been isolated from plants, but some are assumed to act as facultative human pathogens. In study, an in-depth analysis isolate blood was performed. The strain originally and identified member Enterobacter cloacae complex, exhibiting atypical result in susceptibility testing. Therefore, genetic background examined, including phylogenetic classification screening for virulence factors. Using...

Les jeunes plants étudiés (Sapin pectine.Epicéa commun, Pin laricio de Corse et Weymouth) étaient dans leur troisième année.Ils avaient été installés à un an des pots matière plastique (fig.1), rendus étanches, après repiquage, par la cire.Chaque espèce comprend trois lots, soumis modalités d'alimentation en eau différentes : restitutions, jour jour, totalité l'eau transpirée (modalité 1) ; restitutions calculées façon provoquer, même chez tous les du lot, une sécheresse d'été 2) entraînant...

Abstract Aim Despite an improved understanding of Southern Hemisphere plant biogeography, the origins and evolution sub‐Antarctic floras remain poorly studied. Here, we investigate historical biogeography representatives genus Ranunculus . We aimed to establish when from where ranunculi originated as well examine extent which ecomorphological traits explain contemporary biogeographical patterns. Location temperate zones. Methods first estimated a dated phylogeny for using combined...

Au cours des dernières années, la question changements globaux est devenue un sujet de préoccupation grandissante en Europe aussi bien qu'en Amérique du Nord.Selon divers auteurs, ces globaux, dus à l'augmentation concentration dans l'atmosphère gaz dits «à effet serre», devraient se traduire par réchauffement moyen 1,5 4 °C d'ici 2050 (Washington et Meehl, 1984 ; Wetherald Manabe, 1986 ;Wilson Mitchell, 1987 ;Schlesinger Zhao, Wigley Râper, 1992).Parmi serre, le carbonique (CO 2 ) plus...

Sur la base de l'analyse des cernes 1 200 sapins répartis dans placettes sur l'ensemble Vosges,on a établi que le potentiel production global augmenté 70 % entre 1850 et 1930-40,pour connaître ensuite une légère baisse (— 10 %).Au cours du XXe siècle,on observe plusieurs crises vitalité profondes durables (1916-25, 1943-51 1973-82).Le dépérissement "actuel" apparaît globalement terminé. L'ensemble ces phénomènes ont un déterminisme climatique très étroit : 80 variabilité croissance observée...