Publications by authors named "Danel B Vickerman"
Article Synopsis
- The bacterial pathogen Xylella fastidiosa, found in various plant species in the Americas, serves as a model for studying how bacteria adapt to different plant hosts.
- Researchers used multilocus sequence typing (MLST) to analyze 143 isolates, identifying distinct genetic variations (STs) and their associated plant hosts, revealing specific host preferences and minimal overlap between related subspecies.
- Findings indicated that host specialization is influenced by genetic factors, with unique host types corresponding to certain STs, while some genotypes showed flexibility in infecting different plant families.
Selenium biotransformations in an insect ecosystem: effects of insects on phytoremediation.
Environ Sci Technol
July 2004
Phytoremediation of selenium-contaminated soils may be influenced by higher trophic levels including insects. We examined how selenium affects the behavior, survival, and development of the wasp parasitoid Cotesia marginiventris, parasitizing its natural host, the beet armyworm Spodoptera exigua, feeding on alfalfa, Medicago sativa, irrigated with water containing selenate. X-ray absorption spectroscopy was used to quantify the selenium chemical forms in each trophic level.
View Article and Find Full Text PDFBiotransfer of selenium: effects on an insect predator, Podisus maculiventris.
Ecotoxicology
December 2003
The effects of selenium (Se) accumulation in phytophagous insects on predators in the next trophic level were investigated. The generalist predator Podisus maculiventris Say (Hemiptera: Pentatomidae) was fed an herbivore Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) larvae from control diet and diets at two Se levels (0, 109, and 135 microg/g sodium selenate dry weight added). Predators reared on larvae grown on diets with sodium selenate took longer to complete each developmental stage and had significantly higher mortality rates.
View Article and Find Full Text PDF