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Legume growth-promoting rhizobia: An overview on the Mesorhizobium genus
Laranjo, Marta; Alexandre, Ana; Oliveira, SolangeThe need for sustainable agricultural practices is revitalizing the interest in biological nitrogen fixationand rhizobia-legumes symbioses, particularly those involving economically important legume crops interms of food and forage. The genus Mesorhizobium includes species with high geographical dispersionand able to nodulate a wide variety of legumes, including important crop species, like chickpea or bis-erru...
Aplicação da modelização por redes neuronais ao teor de compostos fenólicos e a...
Guiné, Raquel; Barroca, Maria João; Gonçalves, Fernando; Alves, Mariana; Oliveira, Solange; Mendes, MateusOs compostos fenólicos estão amplamente presentes no reino vegetal, sendo essenciais para o crescimento e reprodução das plantas, além de serem responsáveis pela cor, adstringência e aroma em vários alimentos [1]. Estes compostos, sendo antioxidantes, combatem os radicais livres, previnem doenças cardíacas, doenças neurodegenerativas, problemas do aparelho circulatório, cancro, inflamação e inibem a oxidação li...
A degenerate pair of primers for simultaneous detection of four alphaand betane...
Varanda, Carla; Cardoso, Joana M.S.; Oliveira, Mônica; Oliveira, Solange; Clara, Maria Ivone; Félix, Maria RosárioThe high infection levels due to Olive latent virus 1 (OLV-1), Olive mild mosaic virus (OMMV) (alphanecrovirus) and Tobacco necrosis virus D (TNV-D) (betanecrovirus) in Portuguese olive orchards prompted us to develop a rapid PCR-based assay for the simultaneous detection of these viruses aimed at the sanitary selection and marketing of plant material in compliance with European Union regulations. A pair of deg...
Global Transcriptional Response to Heat Shock of the Legume Symbiont Mesorhizob...
Alexandre, Ana; Laranjo, Marta; Oliveira, SolangeRhizobia, the bacterial legume symbionts able to fix atmospheric nitrogen inside root nodules, have to survive in varied environmental conditions. The aim of this study was to analyse the transcriptional response to heat shock ofMesorhizobium lotiMAFF303099, a rhizobium with a large multipartite genome of 7.6 Mb that nodulates the model legume Lotus japonicus. Using microarray analysis, extensive transcriptomic...
Response to temperature stress in rhizobia
Alexandre, Ana; Oliveira, SolangeIt is well established that soil is a challenging environment for bacteria, where conditions may change rapidly and bacteria have to acclimate and adapt in order to survive. Rhizobia are an important group of soil bacteria due to their ability to establish atmospheric nitrogen-fixing symbioses with many legume species. Some of these legumes are used to feed either humans or cattle and therefore the use of rhizo...
Molecular characterization of Portuguese populations of the pinewood nematode B...
Valadas, Vera; Laranjo, Marta; Mota, Manuel; Oliveira, SolangeBursaphelenchus xylophilus is the causal agent of pine wilt disease and a worldwide pest with high economic impact. Since its first diagnosis in Portugal in 1999, it has been subjected to quarantine measures with impact on forest health and ecosystem stability, significantly affecting international trade of wood products. The disease was detected in the north and centre of continental Portugal and, since 2008, ...
Expression of an exogenous 1-aminocyclopropane-1-carboxylate deaminase gene in ...
Brígido, Clarisse; Nascimento, Francisco X.; Duan, Jin; Glick, Bernard R.; Oliveira, SolangeOur goal was to study the symbiotic performance of two Mesorhizobium ciceri strains, transformed with an exogenous 1-aminocyclopropane-1-carboxylate deaminase gene (acdS), in chickpea plants under salinity stress. The EE-7 (salt-sensitive) and G-55 (salt-tolerant) M. ciceri strains were transformed with an acdS gene present on plasmid pRKACC. Salinity significantly reduced the overall growth of plants inoculate...
Evidence for the involvement of ACC deaminase from Pseudomonas putida UW4 in th...
Nascimento, Francisco; Vicente, Claudia; Barbosa, Pedro; Espada, Margarida; Glick, B; Mota, Manuel; Oliveira, SolangeAbstract Pine wilt disease, caused by the nematode Bursaphelenchus xylophilus, is responsible for devastation of pine forests worldwide. Until now, there are no effective ways of dealing with this serious threat. The use of 1-aminocyclopropane-1-carboxylate (ACC) deaminase (encoded by the acdS gene)-producing plant growth-promoting bacteria has been shown to be a useful strategy to reduce the damage due to biot...
Most Acid-Tolerant Chickpea Mesorhizobia Show Induction of Major Chaperone Gene...
Brígido, Clarisse; Oliveira, SolangeOur goals were to evaluate the tolerance of mesorhizobia to acid and alkaline conditions as well as to investigate whether acid tolerance is related to the species or the origin site of the isolates. In addition, to investigate the molecular basis of acid tolerance, the expression of chaperone genes groEL and dnaKJ was analyzed using acid-tolerant and sensitive mesorhizobia. Tolerance to pH 5 and 9 was evaluate...
Characterization of bacterial communities associated with the pine sawyer beetl...
Vicente, Claudia; Nascimento, Francisco; Espada, Margarida; Barbosa, Pedro; Hasegawa, Koichi; Mota, Manuel; Oliveira, SolangePine wilt disease (PWD) has a tremendous impact on worldwide forestlands, both from the environmental and economical viewpoints. Monochamus sp., a xylophagous insect from the Cerambycidae family, plays an important role in dissemination of the pinewood nematode, Bursaphelenchus xylophilus, the primary pathogenic agent of PWD. This study investigates, for the first time, the bacterial communities of Monochamus g...
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