Pilar Errea

Pilar Errea
Centro de Investigación y Tecnología Agroalimentaria de Aragón · Department of Horticulturae

About

65
Publications
8,899
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1,279
Citations
Citations since 2017
26 Research Items
780 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Introduction
My research program focuses on graft incompatibility responses in Prunus, with several lines of research to know the processes that trigger the graft incompatibility reaction at earliest stages of graft development. Paralelly I have developed research activity on characterization and evaluation of fruit tree germplasm from mountain areas, developing strategies for the conservation and evaluation of the breeding potential to improve their productivity and adapt new systems to new scenarios

Publications

Publications (65)
Article
Full-text available
The genetic diversity of pear local varieties prospected in mountainous areas from Northeastern Spain (Pyrenees and Iberian Cordillera) is not well known so far. In this study, an overall set of 252 accessions (178 prospected in mountainous areas from Aragon and a diverse set of 74 reference cultivars) was analyzed using 14 SSRs in order to estimat...
Article
Full-text available
In the last years, an important renewal of plant material from different breeding programs is taking place in apricot in order to improve resistance to biotic stresses, extension of the harvest season, fruit quality, and productivity. However, the graft compatibility of many of these cultivars with most popular Prunus rootstocks is unknown, and thi...
Article
European plum (Prunus domestica L.) is a fruit species with a remarkable historical relevance in Spain, in which hardly any studies of genetic diversity have been carried out, possibly as a consequence of the difficulty of such studies in polyploid species. In this work, 120 local accessions European plum prospected in northeastern Spain and 46 ref...
Article
Full-text available
Graft incompatibility (GI) between the most popular Prunus rootstocks and apricot cultivars is one of the major problems for rootstock usage and improvement. Failure in producing long-leaving healthy grafts greatly affects the range of available Prunus rootstocks for apricot cultivation. Despite recent advances related to the molecular mechanisms o...
Article
Full-text available
Ancient apple cultivars grown in local areas have so far been largely unexplored and may attract a large share of consumers oriented towards natural foods evoking ancient flavors. In this work, 34 traditional apple cultivars of the Pyrenees were analyzed in terms of sugar and acidity profile and their relation, as alternative fruits for a growing d...
Article
Full-text available
Floral self-incompatibility affecting yearly yield in a weather-dependent manner and graft incompatibility affecting longevity of mature trees are two important traits for apricot production. However, genetic control of graft compatibility and relationship between these traits are unknown. Here, we analyzed its inheritance in an F1 apricot progeny...
Article
Full-text available
European plum (Prunus domestica L.) is an ancient domesticated species cultivated in temperate areas worldwide whose genetic structure has been scarcely analyzed to date. In this study, a broad representation of Spanish European plum germplasm collected in Northeastern Spain and a representative set of reference cultivars were compared using nuclea...
Data
Minimum spanning networks (MSN) performed on Bruvo’s distances for all genotypes clustered in the groups defined by STRUCTURE at K = 2 (A), K = 3 (B) and K = 5 (C). Each node represents one genotype. Edge thickness and color are proportional to genetic distance, while edge lengths are arbitrary. (TIFF)
Data
Information of the unique genotypes used in this study. Collection information include name, collection site, specific longitude, latitude, approximate elevation, group placement by structure analysis with the mean qI values (when K = 2, K = 3 and K = 5 were considered) and the chloroplastic haplotypes. (XLSX)
Data
Restriction patterns obtained with the primer pairs K1K2, HK, CD and VL and three restriction enzymes (AluI, HinfI and TaqI). Polymorphic sites are indicated in bold letters. (DOCX)
Data
Exploration of K value for STRUCTURE analysis of the European plum germplasm evaluated in this study. (A) Estimates of the rate of change of the slope of the log likelihood curve (ÄK) calculated according to [61] are plotted against K. (B) Mean values of the log likelihood of the data given K is plotted against K for 10 simulations with a burn-in p...
Data
Microsatellite code, linkage group, repeat type and PCR details of the 21 SSR markers analyzed in this study. (DOCX)
Data
Frequency distribution of the chloroplastic haplotypes within the genetic groups defined by STRUCTURE at K = 2 (A), K = 3 (B) and K = 5 (C). (DOCX)
Data
Heat maps based on Bruvo’s genetic distance matrix between all genotypes. Genetic groups inferred using STRUCTURE at K = 2 (A), K = 3 (B) and K = 5 (C). Color scales in the matrix indicate genetic distance between genotypes. Red indicates identical, while yellow indicates distantly related. (TIF)
Conference Paper
Este trabajo tiene como objetivo determinar la estrategia más adecuada para la selección del conjunto mínimo de accesiones (núcleo optimizado) que represente eficientemente la variación genética del manzano conservado en las colecciones españolas. Este núcleo optimizado mediante criterios genéticos constituirá la base de la colección nuclear de con...
Article
The nature and structure of genetic diversity in the Spanish apple germplasm preserved at the national level was widely unknown, since studies performed to date on this topic have been exclusively carried out at the regional scale. Here, 1453 accessions from Spanish collections of Malus × domestica were evaluated with a common set of 13 SSR (Simple...
Chapter
Although the benefits of using grafted transplants are now fully recognized worldwide, the need to enlighten the scientific basis of rootstock-scion interactions under variable environmental pressures remains vital for extracting grafting-mediated crop improvement. This has prompted the COST (European Cooperation in Science and Technology) Action F...
Book
This chapter aims to review the biology of grafting and the factors influencing graft compatibility, focusing on the molecular and physiological aspects affecting graft development and success in herbaceous and woody plants. Recently, genes known to be involved in wounding/healing, vascular differentiation, programmed cell death, reactive oxygen sp...
Article
The agronomic behaviour of "Monrepos", a new plum rootstock for cherry selected at CITA of Aragon, has been evaluated. The study was performed during 9 years in the Ebro Valley (Spain), on a heavy and calcareous soil, with the cultivar Compact Stella grafted on 5 rootstocks used for cherry cultivars. Different agronomic characteristics were evaluat...
Article
A set of 183 apple accessions prospected in mountainous areas in Northeastern Spain (Pyrenees and Iberian Cordillera) was studied using 20 simple sequence repeats (SSR markers) in order to estimate its genetic diversity and to identify the genetic structure and relationships among the accessions. Additionally, a set of 23 international as well as t...
Article
Full-text available
Phenylalanine ammonia lyase (PAL) is a key enzyme in the phenylpropanoid pathway responsible for biosynthesis of many secondary metabolites, such as anthocyanins, flavanols, and lignins. The objective of this work was to determine the effect of different rootstock/scion combinations on Prunus tree growth, PAL gene expression, and PAL activity in or...
Article
Full-text available
Graft incompatibility is a significant problem for development of new Prunus rootstocks. Recently, several authors have reported that phenylpropanoid metabolism is related with this phenomenon. The aim of the present work was to analyze the gene expression patterns of the 4-Coumarate:CoA ligase genes in compatible and incompatible graft combination...
Article
Cinnamate 4-hydroxylase (C4H) is the second enzyme in the phenylpropanoid pathway which participates in the synthesis of numerous phenylpropanoid compounds such as flavonoids, lignins, suberins and others. We identified a gene putatively coding for Class I C4H in apricot and plum and we analyzed the expression pattern of this gene under different a...
Article
Graft compatibility with at least most commercial cultivars is an essential trait in rootstock breeding programs for orchard performance and longevity. However, its range of application is restricted by physiological and biochemical factors that produce incompatible grafts. As a biological process, the incompatibility reaction is difficult to study...
Article
Graft compatibility with at least most commercial cultivars is an essential trait in rootstock breeding programs for orchard performance and longevity. However, its range of application is restricted by physiological and biochemical factors that produce incompatible grafts. As a biological process, the incompatibility reaction is difficult to study...
Article
Graft incompatibility is clearly indicated by the breaking of the trees at the graft interface several years after grafting, for instance in many apricot cultivars when grafted on different Prunus rootstocks. Several lines of evidence suggest that cells undergo a progressive lethal senescence throughout early graft development. The term programmed...
Article
One factor that contributes to a successful fruit tree grafting is the establishment of symplasmic contacts in the graft interface to facilitate the transfer of compounds between scion and stock. Using novel experimental and theoretical approaches we investigated whether the localized incompatibility, experienced in some Prunus grafts, could be rel...
Article
Plant grafting is of considerable importance in the deployment and regional adaptation of elite cultivars, but its range of application is restricted by physiological and biochemical factors that produce incompatible grafts. In this work, in vitro stem unions were examined at early stages of graft union development in order to look into the cellula...
Article
Apricot (Prunus armeniaca) shoot cultures infected with apple chlorotic leaf spot virus (ACLSV). peach (Prunus persica) shoot cultures infected with Prunus necrotic ring-spot virus (PNRSV) and ACLSV and sour cherry (Prunus avium) shoot cultures infected with prune dwarf virus (PDV) and ACLSV. were selected to evaluate the response of in vitro grown...
Article
Phenylalanine ammonia-lyase (PAL) is a key enzyme in the synthesis of phenolic compounds, which play a prominent role in graft union formation, including the marked effects of their accumulation in incompatibility response. The purpose of this study was to assess changes in the abundance of PAL mRNA during graft union development. Partial cDNA clon...
Article
Graft compatibility response is a complex mechanism with a wide range of different physiological, biochemical, and anatomical interactions. However, little is known about the biochemical basis for incompatibility and the molecular mechanism involved in this response. In the present paper, the influence of grafting on the protein pattern in the inco...
Article
The cultivar 'Moniqui', one of the most appreciated apricots, needs the use of rootstocks other than P. armeniaca in order to resolve the problems of its soil adaptation. In the selection of rootstocks for 'Moniqui', the study of incompatibility is an essential criterion, and it is necessary to detect this problem at an early stage of development....
Article
The mechanism of graft incompatibility is not yet fully understood and many reports focus on this problem in order to understand the mechanisms of graft development. These reports refer to both cytological and biochemical responses occurring at an early phase in response to grafting, as well as the consequences of these events on the future graft r...
Article
The seasonal variation in the detection of the pear decline phytoplasma was followed in diseased pear trees pertaining to the cultivars ‘Limonera’, ‘Magallón’ and ‘Monsallard’. Wood and/or leaf samples were obtained every two weeks at five different above-ground levels and analyzed using nested-PCR (Polymerase Chain Reaction). The results revealed...
Article
Graft compatibility has been studied in vitro using callus tissues of apricot (Prunus armeniaca) and different Prunus rootstocks to form scion/rootstock combinations with different degrees of graft compatibility. In these species, incompatibility is manifested by a breakdown of the trees at the union area that can occur some years after grafting. H...
Article
In order to further elucidate the role of flavanols in graft formation and incompatibility problems in apricot, analytical and histological data were collected from graft combinations consisting of P. insititia cv. Montizo as rootstock and either the cultivar Luizet or Moniqui as scion. The latter is known for its exigent character and for incompat...
Article
Cultivar stability in fruit tree species is ensured by grafting on particular rootstocks and a fruit tree can be considered as a symbiosis between scion and rootstock. However, heterospecific grafts are often incompatible resulting in death of the tree. The causes of graft incompatibility remain still unknown, although many biochemical events are a...
Article
Graft compatibility has been studied in apricot (prunus armeniaca L.) grafted on Prunus cerasifera Ehrh. Two apricot cultivars, one compatible and one incompatible on this rootstock, were selected for this study. In these species incompatibility is only manifested by tree breakdown at a late phase of the tree's life. The process of graft union form...
Article
Full-text available
La mayor parte de la producción mundial de albaricoques (60%) se concentra en la cuenca mediterránea, aunque en los últimos años está aumentando considerablemente la produc-ción en algunos países asiáticos, como Irán y Pakistán. Espa-ña es el tercer productor mundial, por detrás de Turquía e Irán. El destino de la producción varía en los distintos...

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