Host-Plant Chemicals and Distribution of Neuquenaphis on Nothofagus |
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Authors: | Andrés Quiroz Eduardo Fuentes-Contreras Claudio C. Ramírez Graeme B. Russell Hermann M. Niemeyer |
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Affiliation: | (1) Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile;(2) Present address: The Horticulture and Food Research Institute, Private Bag 11030, Palmerston North, New Zealand |
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Abstract: | Extractable metabolites from leaves (EM) and volatiles released from six Nothofagus species were analyzed by TLC and GC-MS, respectively. Aphids of the genus Neuquenaphis, closely associated to Nothofagus, were sampled on each Nathofagus species. Cluster analyses of Nothofagus species were performed based on the presence or absence of EM and volatiles. Dissimilarity distances, from the cluster analyses of EM and volatiles, were used to evaluate their association with the aphid distribution. A major component identified from EM and volatiles of three species of Nothofagus, -agarofuran, was attractive to alates of the oligophagous Neuquenaphis sensoriata, which use them as hosts. These results suggest that chemicals play a significant role in the host-plant associations between Neuquenaphis and Nothofagus. |
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Keywords: | Nothofagus Neuquenaphis volatiles olfactometry /content/p3r1w8831l602p65/xxlarge945.gif" alt=" agr" align=" BASELINE" BORDER=" 0" >-agarofuran |
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