Beneficial rhizospheric microorganisms against Flavescence doreè phytoplasma (Abstract/Poster in atti di convegno)

Type
Label
  • Beneficial rhizospheric microorganisms against Flavescence doreè phytoplasma (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • Galetto L., Bosco D., Gamalero E., D'Agsostino G., Berta G., Marzachì C. (2013)
    Beneficial rhizospheric microorganisms against Flavescence doreè phytoplasma
    in XIX Convegno Nazionale SIPAV, Padova, 23-25 Settembre 2013
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Galetto L., Bosco D., Gamalero E., D'Agsostino G., Berta G., Marzachì C. (literal)
Pagina inizio
  • 149 (literal)
Pagina fine
  • 149 (literal)
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  • Atti di Convegno del XIX Convegno Nazionale SIPAV, Padova, 23-25 Settembre 2013 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 1 (literal)
Note
  • Abstract (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • GL,BD,MC: Istituto di Virologia Vegetale, CNR, Torino, Italy BD: Università degli Studi di Torino, Grugliasco, Torino, Italy GE,BG: Università del Piemonte Orientale 'Amedeo Avogadro', Alessandria, Italia DAG: Mybasol s.r.l., spin-off dell'Università del Piemonte Orientale, Alessandria, Italia (literal)
Titolo
  • Beneficial rhizospheric microorganisms against Flavescence doreè phytoplasma (literal)
Abstract
  • Bacteria living on and inside the root system and arbuscular mycorrhizal (AM) fungi form strict associations with most plants and may influence growth and health by improving plant nutrition and its ability to overcome biotic and abiotic stresses. Plant inoculation with beneficial microorganisms may represent a valid tool for controlling phytoplasma diseases in the frame of an IPM strategy. The effects of AM fungi, bacterial endophytes and rhizobacteria against flavescence dorée phytoplasma (FDP) infection were assessed in periwinkle (Catharanthus roseus) used as model plant. In nature, FDP is associated with grapevine yellows, a serious threat for wine production in Europe and especially in north-western Italy. Plant protection from the disease, FDP multiplication, pattern and severity of symptom expression were evaluated in plant inoculated with the microorganisms in different combinations as well as in the non inoculated controls. Physiological parameters, such as wet and dry weight of entire treated plants, roots, shoots and leaves, were also evaluated. In a preliminary experiment, 12 different bacterial strains, belonging to Pseudomonas, Bacillus and Streptomyces genera, as well as two mixed mycorrhizal inocula were assayed. We then focused on two bacterial endophytes, P. fluorescens YsS6 and Pseudomonas spp. 8R6, producing aminocyclopropane-carboxylic acid (ACC) deaminase and their mutants lacking of this enzymatic activity. Interestingly, the strain 8R6 resulted in some level of resistance to phytoplasma infection in terms of symptom severity and FDP multiplication rate. The evaluation of the activity of rhizospheric microorganisms in mitigating phytoplasma damage under field conditions on grapevine is currently under investigation. (literal)
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