Aldemiro sousa jorge - Academia.edu (original) (raw)
Papers by Aldemiro sousa jorge
Phytopathology, Mar 4, 2015
Root-knot nematodes (RKN), Meloidogyne spp., have major economic impact on coffee production in C... more Root-knot nematodes (RKN), Meloidogyne spp., have major economic impact on coffee production in Central and South America. Genetic control of RKN constitutes an essential part for integrated pest management strategy. The objective of this study was to evaluate the resistance of Coffea canephora genotypes (clones) to Meloidogyne spp. Sensitive and drought-tolerant coffee genotypes were used to infer their resistance using nematode reproduction factor and histopathology. Eight clonal genotypes were highly resistant to M. paranaensis. 'Clone 14' (drought-tolerant) and 'ESN2010-04' were the only genotypes highly resistant and moderately resistant, respectively, to both M. incognita races 3 and 1. Several clones were highly resistant to both avirulent and virulent M. exigua. Clone 14 and ESN2010-04 showed multiple resistance to major RKNs tested. Roots of 'clone 14' (resistant) and 'clone 22' (susceptible) were histologically studied against infection by M. incognita race 3 and M. paranaensis. Reduction of juvenile (J2) penetration in clone 14 was first seen at 2 to 6 days after inoculation (DAI). Apparent early hypersensitive reaction (HR) was seen in root cortex between 4 and 6 DAI, which led to cell death and prevention of some nematode development. At 12 to 20 DAI, giant cells formed in the vascular cylinder, besides normal development into J3/J4. From 32 to 45 DAI, giant cells were completely degenerated. Late, intense HR and cell death were frequently observed around young females and giant cells reported for the first time in coffee pathosystem. These results provide rational bases for future studies, including prospection, characterization, and expression profiling of genomic loci involved in both drought tolerance and resistance to multiple RKN species.
A decomposição de carcaça e um processo natural, tendo o grupo dos insetos desempenhado important... more A decomposição de carcaça e um processo natural, tendo o grupo dos insetos desempenhado importante papel como decompositores (Ururahy -Rodrigues et al., 008; Castro e Queiroz, 2010). Dípteros se destacam neste contexto, sendo representados principalmente pe-las famílias Calliphoridae, Sarcophagidae e Muscidae (Rosa et al., 009; Silva et al., 010). A composição da comunidade de dípteros associados a carcaças pode va-riar entre os períodos de decomposição (Barros et al., 2008), entre tipos de carcaças (Anjos, 2009) e entré areas (Rosa et al., 009). Em carcaças de pequenos mamíferos as famílias mais encontradas são Callipho-ridae e Sarcophagidae (Anjos, 2009; Abd El -bar e Sawaby, 2011). Já em carcaças de aves Anjos (2009) apontou dominância da família Calliphoridae, enquanto Oliveira et al., (2009) mostraram a dominância de Pho-ridae para esse tipo de substrato. Sendo assim, há a ne-cessidade de um maior conhecimento da Dipterofauna do cerrado, pois apesar do grande número de trabalho...
Phytopathology, Mar 4, 2015
Root-knot nematodes (RKN), Meloidogyne spp., have major economic impact on coffee production in C... more Root-knot nematodes (RKN), Meloidogyne spp., have major economic impact on coffee production in Central and South America. Genetic control of RKN constitutes an essential part for integrated pest management strategy. The objective of this study was to evaluate the resistance of Coffea canephora genotypes (clones) to Meloidogyne spp. Sensitive and drought-tolerant coffee genotypes were used to infer their resistance using nematode reproduction factor and histopathology. Eight clonal genotypes were highly resistant to M. paranaensis. 'Clone 14' (drought-tolerant) and 'ESN2010-04' were the only genotypes highly resistant and moderately resistant, respectively, to both M. incognita races 3 and 1. Several clones were highly resistant to both avirulent and virulent M. exigua. Clone 14 and ESN2010-04 showed multiple resistance to major RKNs tested. Roots of 'clone 14' (resistant) and 'clone 22' (susceptible) were histologically studied against infection by M. incognita race 3 and M. paranaensis. Reduction of juvenile (J2) penetration in clone 14 was first seen at 2 to 6 days after inoculation (DAI). Apparent early hypersensitive reaction (HR) was seen in root cortex between 4 and 6 DAI, which led to cell death and prevention of some nematode development. At 12 to 20 DAI, giant cells formed in the vascular cylinder, besides normal development into J3/J4. From 32 to 45 DAI, giant cells were completely degenerated. Late, intense HR and cell death were frequently observed around young females and giant cells reported for the first time in coffee pathosystem. These results provide rational bases for future studies, including prospection, characterization, and expression profiling of genomic loci involved in both drought tolerance and resistance to multiple RKN species.
A decomposição de carcaça e um processo natural, tendo o grupo dos insetos desempenhado important... more A decomposição de carcaça e um processo natural, tendo o grupo dos insetos desempenhado importante papel como decompositores (Ururahy -Rodrigues et al., 008; Castro e Queiroz, 2010). Dípteros se destacam neste contexto, sendo representados principalmente pe-las famílias Calliphoridae, Sarcophagidae e Muscidae (Rosa et al., 009; Silva et al., 010). A composição da comunidade de dípteros associados a carcaças pode va-riar entre os períodos de decomposição (Barros et al., 2008), entre tipos de carcaças (Anjos, 2009) e entré areas (Rosa et al., 009). Em carcaças de pequenos mamíferos as famílias mais encontradas são Callipho-ridae e Sarcophagidae (Anjos, 2009; Abd El -bar e Sawaby, 2011). Já em carcaças de aves Anjos (2009) apontou dominância da família Calliphoridae, enquanto Oliveira et al., (2009) mostraram a dominância de Pho-ridae para esse tipo de substrato. Sendo assim, há a ne-cessidade de um maior conhecimento da Dipterofauna do cerrado, pois apesar do grande número de trabalho...