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Mites and leaf domatia: no evidence of mutualism in Coffea arabica plants Biota Neotropica
Romero,Gustavo Quevedo; Daud,Rodrigo Damasco; Salomão,Adriana Trevizoli; Martins,Luiz Fernando; Feres,Reinaldo José Fazzio; Benson,Woodruff Whitman.
We conducted experiments by blocking off pit-like domatia from old and new leaves of Coffea arabica L., using tiny resin drops, to investigate the role of domatia on i) mite abundance at the community level and on ii) leaf damages. More than 77% of the mites collected were predators, whereas 19 and 3.3% were omnivores and phytophages, respectively. Domatia blockage treatment had no influence either on mite abundances or leaf damages. However, predatory and omnivorous mites were more abundant on new than on the old leaves; phytophagous mites occurred at very low density and occupied only plants having open domatia. The absence of mutualism between mites and C. arabica probably occurred because the entrances of domatia were too small and did not enable the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mite-plant interactions; Mite community; Space limitation; Atlantic Rain Forest; Mutualism breakdown.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100002
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Biodegradation of petroleum hydrocarbons in hypersaline environments BJM
Martins,Luiz Fernando; Peixoto,Raquel Silva.
Literature on hydrocarbon degradation in extreme hypersaline media presents studies that point to a negative effect of salinity increase on hydrocarbonoclastic activity, while several others report an opposite tendency. Based on information available in the literature, we present a discussion on the reasons that justify these contrary results. Despite the fact that microbial ability to metabolize hydrocarbons is found in extreme hypersaline media, indeed some factors are critical for the occurrence of hydrocarbon degradation in such environments. How these factors affect hydrocarbon degradation and their implications for the assessment of hydrocarbon biodegradation in hypersaline environments are presented in this review.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrocarbon biodegradation; Halophile; Hypersaline environment; Halophilic/halotolerant hydrocarbon-degraders.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300003
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