Evaluation of the Effects of the Allelochemical 5-Hydroxy-1,4-Naphthoqulnone on the Invasive Species Rhamnus Cathartica
Location
CSU 203
Start Date
24-4-2007 8:15 AM
End Date
24-4-2007 9:45 AM
Student's Major
Biological Sciences
Student's College
Science, Engineering and Technology
Mentor's Name
Christopher T. Ruhland
Mentor's Department
Biological Sciences
Mentor's College
Science, Engineering and Technology
Description
Rhamnus cathartica L. (European buckthorn) is an invasive species in North America and a barrier to successful restoration and conservation efforts. Current control measures for this invasive include fire and/or herbicide application and removal by hand. These are work-intensive procedures and, due to the ability of this plant to resprout from stumps, yield only marginal results. Commercial herbicides, while providing an essential service in many managed areas, are often controversial and potentially detrimental to natural processes. Juglone (5-hydroxy-l,4-naphthoquinone) is the oxidized, potentially allelopathic form of a compound that is released from the leaves, fruit and roots of Juglans nigra L. (Black walnut).' Previous laboratory studies demonstrated the sensitivity and tolerance of a range of species to this compound in hydroponic systems. The purpose of this research was to determine the effects of juglone on R. cathartica in a soil system. Juglone was applied to Glycine max L. Merr. (soybean) a species that has shown sensitivity to juglone in previous studies, to detennine the effectiveness of juglone application to the soil. Potted/?. cathartica seedlings were then exposed to juglone at three concentrations, 10, 100 and 1000_M, in sterilized soil in a greenhouse. Dark and light adapted yield of photosystem II, net photosynthesis, water potential, growth rate and biomass accumulation were measured for all plants; soils were tested for acidification. Interpretation of the effects of juglone on R. cathartica may lead to insight into the control and occurrence of this invasive.
Evaluation of the Effects of the Allelochemical 5-Hydroxy-1,4-Naphthoqulnone on the Invasive Species Rhamnus Cathartica
CSU 203
Rhamnus cathartica L. (European buckthorn) is an invasive species in North America and a barrier to successful restoration and conservation efforts. Current control measures for this invasive include fire and/or herbicide application and removal by hand. These are work-intensive procedures and, due to the ability of this plant to resprout from stumps, yield only marginal results. Commercial herbicides, while providing an essential service in many managed areas, are often controversial and potentially detrimental to natural processes. Juglone (5-hydroxy-l,4-naphthoquinone) is the oxidized, potentially allelopathic form of a compound that is released from the leaves, fruit and roots of Juglans nigra L. (Black walnut).' Previous laboratory studies demonstrated the sensitivity and tolerance of a range of species to this compound in hydroponic systems. The purpose of this research was to determine the effects of juglone on R. cathartica in a soil system. Juglone was applied to Glycine max L. Merr. (soybean) a species that has shown sensitivity to juglone in previous studies, to detennine the effectiveness of juglone application to the soil. Potted/?. cathartica seedlings were then exposed to juglone at three concentrations, 10, 100 and 1000_M, in sterilized soil in a greenhouse. Dark and light adapted yield of photosystem II, net photosynthesis, water potential, growth rate and biomass accumulation were measured for all plants; soils were tested for acidification. Interpretation of the effects of juglone on R. cathartica may lead to insight into the control and occurrence of this invasive.
Recommended Citation
Miles, Genevieve L.. "Evaluation of the Effects of the Allelochemical 5-Hydroxy-1,4-Naphthoqulnone on the Invasive Species Rhamnus Cathartica." Undergraduate Research Symposium, Mankato, MN, April 24, 2007.
https://cornerstone.lib.mnsu.edu/urs/2007/oral-session-11/5
