2013
Madeira, João A.; Fernandes, G. Wilson; González-Rodríguez, Antonio; Cuevas-Reyes, Pablo
Tri-trophic interactions among congeneric sympatric host plants of Chamaecrista, seed predators and parasitoids Artículo de revista
En: Arthropod-Plant Interactions, vol. 7, iss. 4, pp. 403-413, 2013, ISSN: 18728855.
Resumen | Enlaces | Etiquetas: Bruchidae, Insect herbivory, Parasitoid wasps, Seed predation, Serra do Cipó
@article{Madeira2013,
title = {Tri-trophic interactions among congeneric sympatric host plants of Chamaecrista, seed predators and parasitoids},
author = {João A. Madeira and G. Wilson Fernandes and Antonio González-Rodríguez and Pablo Cuevas-Reyes},
doi = {10.1007/s11829-013-9255-2},
issn = {18728855},
year = {2013},
date = {2013-01-01},
journal = {Arthropod-Plant Interactions},
volume = {7},
issue = {4},
pages = {403-413},
abstract = {The defensive role against seed predation of a set of plant traits in 13 congeneric sympatric taxa (Chamaecrista: Leguminosae), and the influence of the third trophic level on seed predators' performance and host range were investigated. Taxa co-occur in rupestrian grasslands in Serra do Cipó, Brazil, and belong to three taxonomic sections. Fruit production, fruit pubescence, and seed size were analyzed. Measures of these traits in the 13 taxa were regressed separately against seed predation rates by endophagous and ectophagous insects. Time of seed production and fruit pubescence showed no influence on seed predation rates by either predator type. Seed size was positively correlated to bruchid seed predation, but negatively related to ectophagous seed predation. There was a negative correlation between glandular fruit trichome length and parasitism rates of bruchids, suggesting that seed predation pressure may have produced evolutionary responses from plants (fruit trichome reduction), which should facilitate parasitoid action. © 2013 Springer Science+Business Media Dordrecht.},
keywords = {Bruchidae, Insect herbivory, Parasitoid wasps, Seed predation, Serra do Cipó},
pubstate = {published},
tppubtype = {article}
}
The defensive role against seed predation of a set of plant traits in 13 congeneric sympatric taxa (Chamaecrista: Leguminosae), and the influence of the third trophic level on seed predators' performance and host range were investigated. Taxa co-occur in rupestrian grasslands in Serra do Cipó, Brazil, and belong to three taxonomic sections. Fruit production, fruit pubescence, and seed size were analyzed. Measures of these traits in the 13 taxa were regressed separately against seed predation rates by endophagous and ectophagous insects. Time of seed production and fruit pubescence showed no influence on seed predation rates by either predator type. Seed size was positively correlated to bruchid seed predation, but negatively related to ectophagous seed predation. There was a negative correlation between glandular fruit trichome length and parasitism rates of bruchids, suggesting that seed predation pressure may have produced evolutionary responses from plants (fruit trichome reduction), which should facilitate parasitoid action. © 2013 Springer Science+Business Media Dordrecht.
2011
Cuevas-Reyes, Pablo; Fernandes, G. Wilson; González-Rodríguez, Antonio; Pimenta, Mariana
Effects of generalist and specialist parasitic plants (Loranthaceae) on the fluctuating asymmetry patterns of ruprestrian host plants Artículo de revista
En: Basic and Applied Ecology, vol. 12, iss. 5, pp. 449-455, 2011, ISSN: 16180089.
Resumen | Enlaces | Etiquetas: Fluctuating asymmetry, Host parasite-relationships, mistletoe, Parasitism impact, Rupestrian fields, Serra do Cipó, Serra do Rola Moça
@article{Cuevas-Reyes2011a,
title = {Effects of generalist and specialist parasitic plants (Loranthaceae) on the fluctuating asymmetry patterns of ruprestrian host plants},
author = {Pablo Cuevas-Reyes and G. Wilson Fernandes and Antonio González-Rodríguez and Mariana Pimenta},
doi = {10.1016/j.baae.2011.04.004},
issn = {16180089},
year = {2011},
date = {2011-01-01},
journal = {Basic and Applied Ecology},
volume = {12},
issue = {5},
pages = {449-455},
abstract = {Leaf fluctuating asymmetry (FA) is an important indicator of plant responses to various sources of stress, which range from poor nutritional and harsh environmental conditions to herbivory and parasitism. Mistletoes are important hemiparasites, which represent a source of stress for their host plants but, in spite of being common in all major biogeographical regions of the world, no study has measured the response of their hosts in terms of leaf FA. We addressed the effect of mistletoes on host-plant foliar FA by comparing parasitized and non-parasitized individuals of four host species in two sites in southeastern Brazil, Serra do Cipó and Serra do Rola Moça. In the four host species, parasitized individuals presented significantly higher levels of leaf FA than unattacked plants. The specialist mistletoe Phoradendron cf. amplexicaule induced higher levels of FA on its host Erythroxylum suberosum (Erythroxylaceae) than the generalist mistletoe Struthanthus flexicaulis did on either Mimosa calodendron (Fabaceae), Lychnophora pinaster (Asteraceae) or Stachytarpheta glabra (Verbenaceae). We hypothesized that specialized parasites could be more damaging to their hosts than generalist mistletoes, which could explain the higher FA levels observed. Significant differences in FA levels among parasitized individuals within species were found, which were significantly correlated with intensity of infection (number of mistletoes per host individual). The results indicate that mistletoes represent an important factor of stress for their host plants, and that FA can be an excellent instrument for evaluating the effects of infections by parasitic plants. © 2011 Gesellschaft für Ökologie.},
keywords = {Fluctuating asymmetry, Host parasite-relationships, mistletoe, Parasitism impact, Rupestrian fields, Serra do Cipó, Serra do Rola Moça},
pubstate = {published},
tppubtype = {article}
}
Leaf fluctuating asymmetry (FA) is an important indicator of plant responses to various sources of stress, which range from poor nutritional and harsh environmental conditions to herbivory and parasitism. Mistletoes are important hemiparasites, which represent a source of stress for their host plants but, in spite of being common in all major biogeographical regions of the world, no study has measured the response of their hosts in terms of leaf FA. We addressed the effect of mistletoes on host-plant foliar FA by comparing parasitized and non-parasitized individuals of four host species in two sites in southeastern Brazil, Serra do Cipó and Serra do Rola Moça. In the four host species, parasitized individuals presented significantly higher levels of leaf FA than unattacked plants. The specialist mistletoe Phoradendron cf. amplexicaule induced higher levels of FA on its host Erythroxylum suberosum (Erythroxylaceae) than the generalist mistletoe Struthanthus flexicaulis did on either Mimosa calodendron (Fabaceae), Lychnophora pinaster (Asteraceae) or Stachytarpheta glabra (Verbenaceae). We hypothesized that specialized parasites could be more damaging to their hosts than generalist mistletoes, which could explain the higher FA levels observed. Significant differences in FA levels among parasitized individuals within species were found, which were significantly correlated with intensity of infection (number of mistletoes per host individual). The results indicate that mistletoes represent an important factor of stress for their host plants, and that FA can be an excellent instrument for evaluating the effects of infections by parasitic plants. © 2011 Gesellschaft für Ökologie.