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7 rezultatus
Absence of CeCl3-detectable peroxisomal glycolate-oxidase activity in developing raphide crystal idioblasts in leaves of Psychotria punctata Vatke and roots of Yucca torreyi L.
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Three peroxisomal enzymes, glycolate oxidase, urate oxidase and catalase were localized cytochemically in Psychotria punctata (Rubiaceae) leaves and Yucca torreyi (Agavaceae) seedling root tips, both of which contain developing and mature calcium-oxalate raphide crystal idioblasts. Glycolate-oxidase
Patterns of genetic structure among populations of an oligophagous pollinating yucca moth (Tegeticula yuccasella).
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Plant-insect associations have served as models for investigations of coevolution and the influence of biotic interactions on diversification. The pollination association between yuccas and yucca moths is a classic example of an obligate mutualism often suggested to have been affected by
Phylogeographic structure in the bogus yucca moth Prodoxus quinquepunctellus (Prodoxidae): comparisons with coexisting pollinator yucca moths.
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The pollination mutualism between yucca moths and yuccas highlights the potential importance of host plant specificity in insect diversification. Historically, one pollinator moth species, Tegeticula yuccasella, was believed to pollinate most yuccas. Recent phylogenetic studies have revealed that it
A test of host-associated differentiation across the 'parasite continuum' in the tri-trophic interaction among yuccas, bogus yucca moths, and parasitoids.
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Parasitic taxa span an antagonistic continuum, with some parasites inflicting no fitness costs to some that kill the host after feeding. Host-associated differentiation is postulated as a major process facilitating speciation in many parasitic taxa. Here, I examined the importance of host-associated
Biogenesis and cytochemistry of unspecialized peroxisomes in root cortical cells of Yucca torreyi L.
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Microbodies containing bipyramidal crystalline nucleoid inclusions occur within every cortical cell in roots of Yucca torreyi. Reaction product deposition attributable to catalase, glycolate oxidase, and urate oxidase activities are cytochemically localized to Yucca root microbodies and classifies
Host-associated divergence and incipient speciation in the yucca moth Prodoxus coloradensis (Lepidoptera: Prodoxidae) on three species of host plants.
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A wide range of evolutionary processes have been implicated in the diversification of yuccas and yucca moths, which exhibit ecological relationships that extend from obligate plant-pollinator mutualisms to commensalist herbivory. Prodoxus coloradensis (Lepidoptera: Prodoxidae) is a yucca moth, which
The influence of interaction type and feeding location on the phylogeographic structure of the yucca moth community associated with Hesperoyucca whipplei.
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The interactions between herbivorous insects and their host plants have been central in generating diversification in both groups. We used a community of four yucca moth species, monophagous on the host plant Hesperoyucca whipplei (Agavaceae), to examine how the type of interaction and where insects
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