Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain

Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain

14 pages; 8 figures; 2 tables

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Main Authors: Navas Cortés, Juan Antonio, Landa, Blanca B., Mercado-Blanco, Jesús, Trapero Casas, José Luis, Rodríguez-Jurado, Dolores, Jiménez-Díaz, Rafael M.
Format: artículo biblioteca
Language:English
Published: American Phytopathological Society 2008-02
Subjects:Olea europaea,
Online Access:http://hdl.handle.net/10261/32368
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spelling dig-ias-es-10261-323682018-08-03T07:54:36Z Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain Navas Cortés, Juan Antonio Landa, Blanca B. Mercado-Blanco, Jesús Trapero Casas, José Luis Rodríguez-Jurado, Dolores Jiménez-Díaz, Rafael M. Olea europaea 14 pages; 8 figures; 2 tables The development of Verticillium wilt epidemics in olive cv. Arbequina was studied from November 1999 to May 2003 in a drip-irrigated, nontillage orchard established in a soil without a history of the disease at Córdoba, southern Spain. Disease incidence measured at 1-month-intervals increased from 0.2 to 7.8% during this period. Verticillium dahliae infecting the trees was characterized as defoliating (D) or nondefoliating (ND) pathotypes by a specific, multiplex-polymerase chain reaction (PCR) assay. Of the symptomatic trees, 87.2 and 12.8% were infected by the D or ND pathotypes, respectively. Dynamics of disease incidence were described by a generalized logistic model with a multiple sigmoid pattern. In the fitted model, the infection rate was highest in the winter to spring period and decreased to minimum values in the summer to fall period. Binary data of disease incidence was analyzed for point pattern and spatial correlation, either directly or after parsing them in contiguous quadrats. Overall, ordinary runs analysis indicated a departure from randomness of disease within rows. The binomial index of dispersion, interclass correlation, and Taylor’s power law for various quadrat sizes suggested aggregation of diseased trees within the quadrat sizes tested. Spatial analysis by distance indices showed a nonrandom arrangement of quadrats containing infected trees. Spatial pattern was characterized by the occurrence of several clusters of infected trees. Increasing clustering over time was generally suggested by stronger values of clustering index over time and by the increase in the size of patch clusters. Significant spatial association was found in the clustering of diseased trees over time across cropping seasons; however, clustering was significant only for infections by D V. dahliae, indicating that infections by the D pathotype were aggregated around initial infections. The number and size of clusters of D V. dahliae-infected trees increased over time. Microsatellite-primed PCR assays of a representative number of V. dahliae isolates from diseased trees indicated that the majority of infecting D isolates shared the fingerprinting profile with D V. dahliae isolated from soil of a naturally infested cotton field in close proximity to the orchard, suggesting that short distance dispersal of the pathogen from this soil to the olive orchard may have occurred. European Commission (Framework Programme 5). QLRT-1999-1523. Peer reviewed 2011-02-15T12:48:50Z 2011-02-15T12:48:50Z 2008-02 artículo http://purl.org/coar/resource_type/c_6501 Phytopathology (2008) 98:167-180 0031-949X http://hdl.handle.net/10261/32368 10.1094/PHYTO-98-2-0167 en http://dx.doi.org/10.1094/PHYTO-98-2-0167 open American Phytopathological Society
institution IAS ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-ias-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IAS España
language English
topic Olea europaea
Olea europaea
spellingShingle Olea europaea
Olea europaea
Navas Cortés, Juan Antonio
Landa, Blanca B.
Mercado-Blanco, Jesús
Trapero Casas, José Luis
Rodríguez-Jurado, Dolores
Jiménez-Díaz, Rafael M.
Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain
description 14 pages; 8 figures; 2 tables
format artículo
topic_facet Olea europaea
author Navas Cortés, Juan Antonio
Landa, Blanca B.
Mercado-Blanco, Jesús
Trapero Casas, José Luis
Rodríguez-Jurado, Dolores
Jiménez-Díaz, Rafael M.
author_facet Navas Cortés, Juan Antonio
Landa, Blanca B.
Mercado-Blanco, Jesús
Trapero Casas, José Luis
Rodríguez-Jurado, Dolores
Jiménez-Díaz, Rafael M.
author_sort Navas Cortés, Juan Antonio
title Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain
title_short Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain
title_full Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain
title_fullStr Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain
title_full_unstemmed Spatiotemporal Analysis of Spread of Infections by Verticillium dahliae Pathotypes Within a High Tree Density Olive Orchard in Southern Spain
title_sort spatiotemporal analysis of spread of infections by verticillium dahliae pathotypes within a high tree density olive orchard in southern spain
publisher American Phytopathological Society
publishDate 2008-02
url http://hdl.handle.net/10261/32368
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