Tamara Corcobado

Tamara Corcobado
Mendel University in Brno · Department of Forest Protection and Wildlife Management

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44
Publications
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801
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Publications

Publications (44)
Article
Full-text available
Phytophthora infections are followed by histological alterations, physiological andmetabolomic adjustments in the host but very few studies contemplate these changes simultaneously. Fagus sylvatica seedlings were inoculated with A1 and A2 mating types of the heterothallic P. xcambivora and with the homothallic P. plurivora to identify plant physiol...
Article
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The degradation of riparian ecosystems occurring throughout the past decades has motivated efforts aimed at the restoration of these ecosystems. The success of active revegetation approaches to restoration requires appropriate selection of reproductive material, which in turn requires knowledge of seed traits and germination. A. glutinosa (L.) Gaer...
Article
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As global plant trade expands, tree disease epidemics caused by pathogen introductions are increasing. Since ca 2000, the introduced oomycete Phytophthora ramorum has caused devastating epidemics in Europe and North America, spreading as four ancient clonal lineages, each of a single mating type, suggesting different geographical origins. We survey...
Article
Full-text available
Citation: Vivas, M.; Hernández, J.; Corcobado, T.; Cubera, E.; Solla, A. Transgenerational Induction of Resistance to Phytophthora cinnamomi in Holm Oak. Forests 2021, 12, 100.
Article
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A severe decline and dieback of European beech (Fagus sylvatica L.) stands have been observed in Austria in recent decades. From 2008 to 2010, the distribution and diversity of Phytophthora species and pathogenic fungi and pests were surveyed in 34 beech forest stands in Lower Austria, and analyses performed to assess the relationships between Phyt...
Article
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In pathogenic fungi and oomycetes, interspecific hybridization may lead to the formation of new species having a greater impact on natural ecosystems than the parental species. From the early 1990s, a severe alder (Alnus spp.) decline due to an unknown Phytophthora species was observed in several European countries. Genetic analyses revealed that t...
Article
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In 2016 and 2017, surveys of Phytophthora diversity were performed in 25 natural and semi-natural forest stands and 16 rivers in temperate and subtropical montane and tropical lowland regions of Vietnam. Using baiting assays from soil samples and rivers and direct isolations from naturally fallen leaves, 13 described species, five informally design...
Poster
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Decline of Alnus glutinosa (L.) Gaertn caused by Phytophthora xalni is an emerging threat to riparian ecosystems, from northern to southern Europe. Reported intraspecific variation within this tree species suggests a variation in resistance in response to the pathogen. This work aimed at investigate the different response of A. glutinosa population...
Article
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The spatial distribution and niche differentiation of three closely related species (Erysiphe alphitoides, Erysiphe quercicola and Erysiphe hypophylla) causing oak powdery mildew was studied at scales ranging from the European continent, where they are invasive, to a single leaf. While E. alphitoides was dominant at all scales, E. quercicola and E....
Article
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During a survey in three declining and three healthy poplar plantations in Serbia, six different Phytophthora species were obtained. Phytophthora plurivora was the most common, followed by P. pini, P. polonica, P. lacustris, P. cactorum, and P. gonapodyides. Pathogenicity of all isolated species to four-month and one-year-old cuttings of Populus hy...
Article
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Political action can reduce introductions of diseases caused by invasive forest pathogens (IPs) and public support is important for effective prevention. The public’s awareness of IP problems and the acceptability of policies aiming to combat these pathogens were surveyed in nine European countries (N = 3469). Although awareness of specific disease...
Article
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Genetic variability of trees influences the chemical composition of tissues. This determines herbivore impact and, consequently, herbivore performance. We evaluated the independent effects of plant genotype and provenance on the tannin content of holm oak (Quercus ilex) and their consequences for herbivory and performance of gypsy moth (Lymantria d...
Article
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Forests in Europe are threatened by increased diversity of Phytophthora species, but effects on trees of simultaneous infections by Phytophthora and ecological consequences of their coexistence are unknown. This study explored variation in early survival of Quercus ilex to Phytophthora infections and assessed interactions between Phytophthora speci...
Article
An analysis of incidence of Phytophthora spp. in 732 European nurseries producing forest transplants, larger specimen trees, landscape plants and ornamentals, plus 2525 areas in which trees and shrubs were planted, is presented based on work conducted by 37 research groups in 23 European countries between 1972 and 2013. Forty-nine Phytophthora taxa...
Article
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Seasonal variations in ectomycorrhizal symbiosis of Quercus ilex trees were studied, with special emphasis on tree health status, Phytophthora cinnamomi root infections and topography. Five Q. ilex forests in western Spain were selected, and ca. 40 000 root tips from 3 declining and 3 non-declining trees per forest were examined. Ectomycorrhizal fu...
Article
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The influence of temperature on germination of Quercus ilex acorns in Phytophthora infested soils was quantified for the first time. Radicle damage and mortality of Q. ilex seeds germinating at 17, 20, 23 and 26°C in Phytophthora cinnamomi, P. gonapodyides, P. quercina and P. psychrophila infested soils were assessed and related to in vitro myceliu...
Article
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More frequent weather extremes are expected to occur in the Mediterranean region within the present context of climate change. These extremes could affect forests and plant diseases driven by pathogens. It is hypothesised that simulation of weather extremes during Quercus ilex growth will influence early performance and susceptibility to the invasi...
Article
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Aims The importance of soil properties as determinants of tree vitality and Phytophthora cinnamomi root infections was analysed. Methods The study comprised 96 declining stands in western Spain, where declining and non-declining holm oak (Quercus ilex L.) trees were sampled. Soil properties (soil depth, Ah horizon thickness, texture, pH, redox pot...
Thesis
Holm oak (Quercus ilex L.) decline is extended in the Mediterranean region and among the factors involved, soil degradation, water stress, changes in soil moisture and shifts in mycorrhizal symbiosis have been described. The main biotic factor associated with holm oak decline is the oomycete Phytophthora cinnamomi Rands. The present work aims to as...
Conference Paper
Oak decline has been explained by numerous concomitant factors, with the root rot oomycete Phytophthora cinnamomi Rands as the main biotic factor involved in Quercus ilex decline. Q. ilex decline has also been associated with changes in the ectomycorrhizal symbiosis. Interactions between P. cinnamomi and ectomycorrhizae are expected to influence Q....
Conference Paper
Geographical variation in the identity of the participants and in the strength of the interactions provides the basis for the existence of coevolutionary mosaics. For coevolving antagonistic interactions such as herbivory, the few existing analyses of broad-scale variation do not rely on a priori expectations on the effect of varying environmental...
Conference Paper
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Seed dispersal is a complex process, where the interactions with frugivores are crucial to the dynamics and regeneration of plant species. This process may be more important in marginal ambient regions, where the plants require specific environmental conditions for the recruitment. Concerning ancient species, it is necessary to understand the effec...
Conference Paper
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Se pretendió observar si encinas decaídas e infectadas de manera natural por Phytophthora cinnamomi originan brinzales más tolerantes al patógeno que encinas no decaídas. En diciembre de 2010 se sembraron y pesaron 40 bellotas de 15 encinas decaídas, con raíces infectadas por P. cinnamomi, y de 15 encinas no decaídas. Se utilizaron alveolos de 0,3...
Conference Paper
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Oak decline is widespread and has been explained by the interaction of abiotic factors such as water deficit and soil disturbances caused by long-term land use, and biotic factors with the soil-borne pathogen Phytophthora spp. as the main contributor [1]. The activity of Phytophthora spp. has been reported to depend on some soil properties such as...
Article
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It is hypothesised that major reductions in tree vitality are related to marked changes in soil water content, extremely wet winters followed by dry summers, and the presence of pathogenic organisms which take advantage of this situation. This study helps clarify the role of annual variations in water table, soil water content and fine root abundan...
Conference Paper
Oak decline is a major forest problem in Iberia, associated with the presence of Phytophthora cinnamomi. Ectomycorrhizae (ECM) are known to be beneficial for trees because promote plant growth and protect roots from pathogen infections [1]. The study aimed to analyse the ECM community structure and its interactions with the presence of P. cinnamomi...
Conference Paper
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Oak decline in Iberia is a complex phenomenon that requires the combination of several factors to occur. Although declining trees are often damaged by several pathogenic oomycetes [1, 2] the interaction among these organisms has still not been investigated. The present study aims to determine under greenhouse conditions whether possible interaction...
Conference Paper
Full-text available
Large‐scale Phytophthora surveys in (1) forest nurseries, advanced tree nurseries, horticultural nurseries and ornamental nurseries and (2) forest, riparian, amenity, landscape and ornamental plantings and horticultural plantations were conducted by 32 research groups in 21 European countries between 1977 and 2012 with most surveys dating from afte...
Conference Paper
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El decaimiento de distintas especies del género Quercus en la península ibérica se ha asociado a un fenómeno complejo, denominado “Seca”, que requiere de una combinación de varios factores. Aunque los árboles dañados se encuentran frecuentemente infectados por varios oomicetos, la interacción entre dichos organismos no ha sido todavía estudiada. El...
Conference Paper
Holm oak “dehesas” are amongst the most representative forest ecosytems in the Iberian Peninsula. Over the last three decades a serious forest decline associated with several species of Phytophthora has been observed. Although previous reports describe the pathogenicity of different species of Phytophthora to Quercus spp. in this ecosystem [1], emp...
Conference Paper
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In Iberia, several species of Phytophthora are involved in the decline of Quercus ilex. The pathogen P. cinnamomi is the most frequent species isolated, whereas P. quercina and P. gonapodyides are less detected [1]. Natural regeneration of declining holm oaks is a main goal for the forest administration, but no information is available about the vi...
Conference Paper
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Son varias las especies de Phytophthora que originan decaimiento de la encina (Quercus ilex) en España, entre ellas P. cinnamomi, P. quercina y P. gonapodyides. La falta de regeneración natural de la encina es motivo actual de gran preocupación en el entorno forestal, y apenas existe información sobre los efectos de estos tres patógenos en la viabi...
Conference Paper
Holm oak (Quercus ilex L.) decline in Iberian Peninsula has been associated to the interaction of biotic and abiotic factors, being considered the soilborne pathogen Phytophthora cinnamomi the main biotic cause and water stress and soil water content fluctuations the most remarkable abiotic factors. The current study aimed to assess soil water cont...
Conference Paper
Phenotypic plasticity of plant species, which enables them to change their structure and function, helps trees to adapt to environmental change. The study aimed to cover Q. ilex responses to changing conditions of soil water content and to assess plant mortality after Phytophthora cinnamomi inoculations. In February 2009 Q. ilex seedlings were plan...
Conference Paper
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El presente trabajo informa sobre cuatro experimentos iniciados en el marco de un proyecto de investigación en vigencia, que aborda la regeneración y mejora de Quercus ilex ante Phytophthora cinnamomi. El primer experimento consiste en cuantificar la regeneración de la encina en 33 focos de seca de Cáceres, donde previamente se ha constatado la pre...
Conference Paper
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El decaimiento de la encina (Quercus ilex) en la península ibérica está asociado a la interacción de factores bióticos y abióticos, entre los que destacan el patógeno de suelo Phytophthora cinnamomi, el estrés hídrico causado por sequías prolongadas y las fuertes oscilaciones de la humedad del suelo. En el presente estudio se realizó un seguimiento...
Conference Paper
Since the mid 2000s extensive mortality of common alder (Alnus glutinosa) has been observed along many rivers of Northern Spain. Symptoms resemble those reported for root and collar rot of alders caused by the different subspecies of Phytophthora alni across Western and Central Europe. In September 2009, samples from five symptomatic A. glutinosa t...
Conference Paper
Oak decline has caused a heavy mortality in Quercus ilex in the region of Extremadura (SW Spain) and consequently significant economic losses. Phytophthora cinnamomi and drought are involved as major factors in this decline. Four experiments have been carried out to determine the involvement of these factors: (i) First, a survey of P. cinnamomi pre...

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