2024-03-29T10:04:37Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1583982018-08-01T11:07:21Zcom_10261_74com_10261_6col_10261_327
2017-12-20T11:57:04Z
urn:hdl:10261/158398
Trichoderma asperellum is effective for biocontrol of Verticillium wilt in olive caused by the defoliating pathotype of Verticillium dahliae
Carrero-Carrón, Irene
Trapero Casas, José Luis
Olivares-García, Concepción
Monte, Enrique
Hermosa, Rosa
Jiménez-Díaz, Rafael M.
Junta de Andalucía
Ministerio de Economía y Competitividad (España)
European Commission
Antibiosis
Biological control
AntaGrowth promotiongonism
Rhizosphere colonization
Olea europaea
Picual olive
Verticillium wilt caused by a highly virulent, defoliating (D) pathotype of Verticillium dahliae is threatening olive production in Spain and other Mediterranean countries. This disease must be managed by an integrated strategy, in which biocontrol agents can play an important role. We have investigated the potential of Trichoderma asperellum strains for antagonism against V. dahliae and suppression of Verticillium wilt of olive caused by the D pathotype. First, we tested the antagonistic potential of T. asperellum strains Bt2, Bt3 and T25 against six V. dahliae isolates, four of the D and two of the nondefoliating (ND) pathotypes, in different in vitro assays. All T. asperellum strains overgrew the colonies of all V. dahliae isolates to a similar extent. However, extracellular compounds from strains Bt3 and T25 showed higher anti-V. dahliae activities than those of Bt2 in membrane assays. Also, growth of Bt2 was reduced by ND V. dahliae whereas that of Bt3 and T25 was not affected by V. dahliae-secreted compounds. In planta assays using strains Bt3 and T25, and ’Picual’ olive plants, showed that the two T. asperellum strains significantly reduced the severity of symptoms and the standardized area under the disease progress curve caused by highly virulent D V. dahliae, but not the final disease incidence. Strain T25 significantly increased growth of ‘Picual’ plants and displayed higher ability for colonizing the olive rhizosphere and establishing endophytic infection in olive roots than Bt3.
2017-12-20T11:57:04Z
2017-12-20T11:57:04Z
2016-10
artículo
Crop Protection 88: 45-52 (2016)
0261-2194
http://hdl.handle.net/10261/158398
10.1016/j.cropro.2016.05.009
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100011011
eng
http://doi.org/10.1016/j.cropro.2016.05.009
Sí
closedAccess
Elsevier