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First Insights into the Genetic Diversity of the Pinewood Nematode in Its Nativ...
Mallez, Sophie; Castagnone, Chantal; Espada, Margarida; Vieira, Paulo; Eisenback, Jonathan D.; Mota, Manuel; Guillemaud, ThomasThe pinewood nematode, Bursaphelenchus xylophilus, native to North America, is the causative agent of pine wilt disease and among the most important invasive forest pests in the East-Asian countries, such as Japan and China. Since 1999, it has been found in Europe in the Iberian Peninsula, where it also causes significant damage. In a previous study, 94 pairs of microsatellite primers have been identified in si...
Sequence variability of the MspI satellite DNA family of the pinewood nematode ...
Vieira, Paulo; Castagnone, Chantal; Mallez, Sophie; Espada, Margarida; Navas, Alfonso; Mota, Manuel; Castagnone-Sereno, PhilippeTandemly repeated sequences known as satellite DNA (satDNA) generally exhibit complex evolutionary patterns of concerted evolution in which mutations are homogenized and fixed in a stochastic process of molecular drive. Here, the nucleotidic variability of the MspI satDNA family of the pinewood nematode Bursaphelenchus xylophilus is analyzed in order to understand the evolutionary dynamics of satDNA at the intr...
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...
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...
Characterization of Bacteria Associated with Pinewood Nematode Bursaphelenchus ...
Vicente, Claudia S. L.; Nascimento, Francisco; Espada, Margarida; Barbosa, Pedro; Mota, Manuel; Glick, Bernard R.; Oliveira, SolangePine wilt disease (PWD) is a complex disease integrating three major agents: the pathogenic agent, the pinewood nematode Bursaphelenchus xylophilus; the insect-vector Monochamus spp.; and the host pine tree, Pinus sp. Since the early 80's, the notion that another pathogenic agent, namely bacteria, may play a role in PWD has been gaining traction, however the role of bacteria in PWD is still unknown. The present...
Pine wilt disease: detection of the pinewood nematode (Bursaphelenchus xylophil...
Ribeiro, Bruno; Espada, Margarida; Vu, T; Nóbrga, F; Mota, Manuel; Carrasquinho, IsabelThe pinewood nematode (PWN), Bursaphelenchus xylophilus, is a serious quarantine pest first detected in Portugal and Europe in 1999. It is the causal agent of pine wilt disease (PWD). A resistance breeding programme has been initiated to contribute to control the evolution of the disease. Five hundred and four adult maritime pine, Pinus pinaster, trees were phenotypically selected as candidate trees for this pr...
The pine wood nematode, Bursaphelenchus xylophilus, in Portugal: possible intro...
Valadas, Vera; Laranjo, Marta; BARBOSA, Pedro; Espada, Margarida; Mota, Manuel; Oliveira, SolangeThe pine wood nematode (PWN), Bursaphelenchus xylophilus, the causal agent of pine wilt disease (PWD), is a major world-wide pathogen and pest of pine, with impacts on forest health, natural ecosystem stability and international trade. In Portugal, PWN was first diagnosed in 1999, the first occurrence also for Europe. The disease was recently detected on the island ofMadeira and in northern Spain. In an attempt...
Perspectives on the use of plant growth promoting bacteria as biocontrol agents...
Nascimento, Francisco; Vicente, Claudia; Espada, Margarida; Mota, ManuelPine Wilt Disease (PWD) has been considered one of the major threats affecting conifer forests and forestry economics throughout the whole world. This complex disease is caused by the pinewood nematode (PWN) Bursaphelenchus xylophilus, through an intricate interaction with other partners like nematode associated bacteria and an insect vector that is responsible for nematode tree-to-tree transportation and disse...
Heterogeneous microbial community associated with Bursaphelenchus xylophilus
Vicente, Claudia; Nascimento, Francisco; Espada, Margarida; Barbosa, Pedro; Mota, Manuel; Glick, B; Oliveira, SolangePine wilt disease (PWD) is a complex disease integrating three major factors: the causal agent, the pinewood nematode Bursaphelenchus xylophilus; the insect-vector Monochamus spp.; and the host pine tree, Pinus sp. Since the early 80’s, the notion that another pathogenic agent involved, namely bacteria, may play a role in PWD has been gaining traction, however the role of bacteria in PWD is still unknown. The p...
Pine wilt disease and red ring disease of coconut: opportunities and perspectiv...
Mota, Manuel; Souza, Ricardo; Vieira, Paulo; Espada, Margarida; Nascimento, Francisco; Vicente, ClaudiaThe xylophagous nematodes Bursaphelenchus cocophilus and B. xylophilus (Nematoda: Parasitaphelenchidae), are causative agents of two serious diseases, “red ring disease” (RRD) with great importance to coconut and certain oil palm species in Central and South America, and in “pine wilt disease” (PWD), which has wreaked havoc in forest areas in the Far East and now more recently in Europe (Portugal and Spain). PW...
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