Juan Carlos Pérez
National University of Colombia
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Featured researches published by Juan Carlos Pérez.
Microbial Ecology | 2010
Chao Yang; Chantal Hamel; Michael P. Schellenberg; Juan Carlos Pérez; Ricardo Luis Louro Berbara
Septate endophytes proliferating in the roots of grasslands’ plants shed doubts on the importance of arbuscular mycorrhizal (AM) symbioses in dry soils. The functionality and diversity of the AM symbioses formed in four replicates of three adjacent plant communities (agricultural, native, and restored) in Grasslands National Park, Canada were assessed in periods of moisture sufficiency and deficiency typical of early and late summer in the region. The community structure of AM fungi, as determined by polymerase chain reaction-denaturing gradient gel electrophoresis, varied with sampling time and plant community. Soil properties other than soil moisture did not change significantly with sampling time. The DNA sequences dominating AM extraradical networks in dry soil apparently belonged to rare taxa unreported in GenBank. DNA sequences of Glomus viscosum, Glomus mosseae, and Glomus hoi were dominant under conditions of moisture sufficiency. In total, nine different AM fungal sequences were found suggesting a role for the AM symbioses in semiarid areas. Significant positive linear relationships between plant P and N concentrations and active extraradical AM fungal biomass, estimated by the abundance of the phospholipid fatty acid marker 16:1ω5, existed under conditions of moisture sufficiency, but not under dry conditions. Active extraradical AM fungal biomass had significantly positive linear relationship with the abundance of two early season grasses, Agropyron cristatum (L.) Gaertn. and Koeleria gracilis Pers., but no relationship was found under dry conditions. The AM symbioses formed under conditions of moisture sufficiency typical of early summer at this location appear to be important for the nutrition of grassland plant communities, but no evidence of mutualism was found under the dry conditions of late summer.
Avances en Recursos Hidráulicos | 2007
Andrés F. Osorio; Juan Carlos Pérez; Cristian A. Ortíz; Raúl Medina
Dyna | 2006
Alberto Calderero; Juan Carlos Pérez; Igone Ugalde Sánchez
Computers and Electronics in Agriculture | 2017
Daniel Pineda; Juan Carlos Pérez
Revista EIA | 2004
Sandra Cristina Arias; Juan Carlos Pérez; Orfely María Rueda
Frontiers in Ecology and the Environment | 2018
Alejandro Salazar; Adriana Sanchez; Juan Camilo Villegas; Juan F. Salazar; Daniel Ruiz Carrascal; Stephen Sitch; Juan D. Restrepo; Germán Poveda; Kenneth J. Feeley; Lina M. Mercado; Paola A. Arias; Carlos A. Sierra; Maria del Rosario Uribe; Angela M. Rendón; Juan Carlos Pérez; Guillermo Murray Tortarolo; Daniel Mercado-Bettín; José A Posada; Qianlai Zhuang; Jeffrey S. Dukes
Dyna | 2017
Daniel Mauricio Pineda-Tobón; Juan Carlos Pérez; Daniel Gaviria-Palacio; Juan José Guáqueta-Restrepo
Acta Agronómica | 2015
Elizabeth Meneses; Gloria Arango; Guillermo Correa; Orlando Ruiz; Luis Gonzalo Vargas; Juan Carlos Pérez
Archive | 2013
Gloria Arango; Carlos Ramírez; Luis Gonzalo Vargas; Laura María Muñoz; Juan Carlos Pérez
Dyna | 2013
Gloria Arango; Carlos Ramírez; Luis Gonzalo Vargas; Laura María Muñoz; Juan Carlos Pérez