Uptake and degradation of natural and synthetic estrogens by maize seedlings

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Title: Uptake and degradation of natural and synthetic estrogens by maize seedlings
Creators: Card, Marcella
Advisor: Chin, Yu-Ping
Issue Date: 2011-03
Abstract: Runoff from manure-fertilized crop fields constitutes a significant source of natural estrogens (e.g., estradiol [E2] and estrone [E1]) and synthetic estrogen mimics (e.g., zeranol [α-ZAL] and zearalanone [ZAN]) in the environment. However, processes such as sorption to and uptake by plants may inhibit the environmental mobility of hormonally-active compounds. To evaluate the role of plants in the environmental fate of such compounds, we exposed maize seedlings to hydroponic solutions containing E2, E1, α-ZAL, and ZAN. After 12 days of exposure, ZAN concentrations decreased by 78%, E1 and α-ZAL decreased 99.9%, and E2 was undetectable. Exposure to seedlings resulted in both oxidation (i.e., transformations of E2 to E1 and α-ZAL to ZAN) and reduction reactions (i.e., E1 to E2 and ZAN to α-ZAL). Although the oxidation of E2 and α-ZAL may be attributed to plant-associated microbes, the reduction of E1 and ZAN is unlikely to be microbially-mediated.
Embargo: A one-year embargo was granted for this item.
Series/Report no.: 2011 Edward F. Hayes Graduate Research Forum. 25th
Keywords: hormone
degradation
phytoremediation
crop
Description: Food, Agricultural, and Environmental Sciences (FAES): 1st Place (The Ohio State University Edward F. Hayes Graduate Research Forum)
URI: http://hdl.handle.net/1811/48534
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