Raul Hernando Posada

Raul Hernando Posada
University of Caldas · Departamento de ciencias exactas y naturales

PhD

About

24
Publications
28,277
Reads
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193
Citations
Additional affiliations
January 2015 - December 2015
National Open University and Distance (Colombia)
Position
  • Full time professor
January 2015 - January 2016
University of Boyaca
Position
  • Full time professor
Education
September 2007 - September 2011
Institute of Ecology INECOL
Field of study
  • Soil Ecology
February 1999 - March 2001
Los Andes University (Colombia)
Field of study
  • Microbiology - Micology
July 1991 - April 1998
National University of Colombia
Field of study
  • Biology

Publications

Publications (24)
Article
Dark septate endophytes (DSE) and arbuscular mycorrhizal fungi (AMF) can simultaneously colonize the roots of different plants; their function and association can range from symbiotic to parasitic. The type of interaction is believed to be dependent on environmental and soil nutritional conditions. We quantified banana root colonization by arbuscul...
Article
The banana is widely and intensively cultivated in the tropics. Traditional production employs a high input of industrial supplements, the excess of which contaminates the environment, altering existing edaphic populations and their functions. Some producers have incorporated other plant species in polycultures to reduce costs and achieve an altern...
Article
Full-text available
Arbuscular mycorrhizal fungi (AMF) are essential for growth of coffee plants in acidic and phosphate deficient soils in Central and South America. We investigated the species richness of Glomeromycotean fungi in 9–13 years old coffee plantations in Colombia and Mexico. Fungal species richness was related to physical and chemical soil factors, soil...
Article
Full-text available
Certain large cities are carrying out programs of afforestation in an attempt to solve problems related to pollution. This incorporation of trees and shrubs has opened the doors to the incorporation of scale insects with patterns of distribution and density that is dependent on many factors. This research evaluated the distribution patterns of scal...
Chapter
Citrus spp. L. are economically important fruit trees in the tropics, subtropics and Mediterranean climates. Vitis vinifera has worldwide importance for table grape and wine production and has its distribution in climates between 40-50 degree latitude South and North of the Americas, Europe, Asia, Africa and Australia. Physalis peruviana (cape goos...
Article
Full-text available
The distribution of arbuscular mycorrhizal (AM) fungal structures in roots, in soil surrounding roots and in amended coffee pulps (CP) was investigated in 12 coffee plantations in Colombia. Fresh CP had been added to plants 6 -10 months before sampling. The questions were whether soil chemical and physical parameter and soil depth had an effect on...
Article
Full-text available
Almost 900 fungal isolates were obtained from eight coffee plantations in Colombia and Mexico. Of these, 76 isolates showed activity to solubilize Ca3(PO4)2 (PCa) and FePO4·H2O (PFe), which had been added to agar in a plate test. Generally, PCa was better solubilized than PFe. Colombian isolates were generally somewhat less effective than Mexican i...
Article
Full-text available
Soil properties and the environment have multiple outcomes on fungal communities. Although, the interaction effects between management intensity, pH, available phosphorus, organic carbon, soil texture and different fractions of water stable macro-aggregates on the communities of microscopic filamentous fungi (MFF), iron phosphate solubilizing fungi...
Article
Full-text available
El suelo y sus propiedades tienen múltiples relaciones con las comunidades fúngicas. El efecto conjunto de la intensidad de manejo y las variables edáficas, incluida la estabilidad de agregados sobre las comunidades de hongos microscópicos filamentosos (HMF), solubilizadores de fosfato de hierro (HSP-Fe) y solubilizadores tanto de fosfato de hierro...
Article
Fungal colonization of litter has been described mostly in terms of fructification succession in the decomposition process or the process of fungal ligninolysis. No studies have been conducted on litter colonization by arbuscular mycorrhizal fungi (AMF) and their relationship with the presence of saprotrophic fungi. The aim of the present study was...
Conference Paper
Full-text available
En Bogotá, desde hace cerca de 10 años se está llevando a cabo un programa de aforestación de la ciudad. Croton bogotensis, Eugenia myrtifolia, Ficus soatensis, Sambucus peruviana y Schinus molle, empleadas en este programa, están padeciendo frecuentes y severas afectaciones por plagas y enfermedades. Debido a que en ambientes citadinos son múltip...
Article
Full-text available
Spore number and root infection by arbuscular mycorrhizal fungi were evaluated in Eugenia myrtifolia, Ficus soatensis and Croton bogotensis, in parks and green zones of urban woodlands of Bogotá DC. The aim was to investigate relations between mycorrhizal associations and tree phyto-sanitary conditions, and effects of two distinct climatic zones. I...
Article
Full-text available
Spore number and root infection by Arbuscular mycorrhizal fungi were evaluated in Eugenia myrtifolia, Ficus soatensis and Croton bogotensis, in parks and green zones of urban woodlands of Bogotá D.C, Colombia. The aim was to investigate relations between mycorrhizal associations and tree phyto-sanitary conditions, and effects of two distinct climat...
Article
Spore number and root infection by Arbuscular mycorrhizal fungi were evaluated in Eugenia myrtifolia, Ficus soatensis and Croton bogotensis, in parks and green zones of urban woodlands of Bogotá D.C, Colombia. The aim was to investigate relations between mycorrhizal associations and tree phyto-sanitary conditions, and effects of two distinct climat...
Article
Full-text available
El complejo de insectos succionadores pertenecientes al género Pseudococcus (Hemiptera: Pseudococcidae) afecta entre otras especies vegetales al caucho sabanero, Ficus soatensis Dugand, especie ampliamente empleada en la arborización urbana de Bogotá sin ser reportada como afectada por el insecto plaga; su alta abundancia en la ciudad y su asociaci...
Article
Full-text available
To evaluate the effects of soil physical and chemical factors (pH, conductivity, humidity, available phosphorus and organic matter) and environmental factors (temperature, relative air humidity, altitude and atmospheric pressure) on arbuscular mycorrhizal fungi (AMF)-Brachiaria decumbens grass relationship. Furthermore to establish patterns of micr...
Article
Full-text available
The diversity of factors influencing the distribution of arbuscular mycorrhizal fungi inoculum (spores and hyphae), plant species, pH, soil humidity, conductivity, P availability, nutrients and heavy metals have been reported. Reports are contradictory and mostly supported on data from temperate zones; under tropical conditions it is difficult to d...
Article
Full-text available
The subject of this research was to evaluate the effect of the time of establishment (05 years, 510 years, and more than 10 years.) of pastures of Brachiaria sp. over the Arbuscular Mycorrhizal Fungal populations (AMF): genus and spore distribution, length of extramatrical mycelia, root colonizations by AMF and septate fungi; the pastures resulting...
Article
Full-text available
La patología arbórea ha progresado con especies de interés comercial, pero poco en otros sectores; la incorporación de árboles y arbustos a las ciudades con fines ornamentales y sanitarios en ambientes diferentes a las silvestres ha llevado a la manifestación de enfermedades de etiologías desconocidas, siendo Croton bogotensis, Ficus soatensis, Fra...

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