TY - JOUR
T1 - Mineralization of the allelochemical sorgoleone in soil
AU - Gimsing, Anne Louise
AU - Bælum, Jacob
AU - Dayan, Franck E.
AU - Locke, Martin A.
AU - Sejerø, Lisbeth Hanefeld
AU - Jacobsen, Carsten Suhr
N1 - Funding Information:
The Carlsberg Foundation and the Danish Research Council for Technology and Production are thanked for their financial support.
PY - 2009/8
Y1 - 2009/8
N2 - The allelochemical sorgoleone is produced in and released from the root hairs of sorghum (Sorghum bicolor). Studies have confirmed that it is the release of sorgoleone that causes the phytotoxic properties of sorghum, and sorgoleone has a potential to become a new natural herbicide, or the weed suppressive activity of sorghum can be utilized in integrated weed management. Since sorgoleone is released into soil, knowledge of the fate of sorgoleone in soil is essential if it is to be utilized as an herbicide. Fate studies will characterize the persistence and mobility of the compound. Three types of radioactively labelled sorgoleone were produced and used to study mineralization (complete degradation to CO2) of this lipid benzoquinone in four soils, two from the United States of America (Mississippi) and two from Denmark. The studies showed that sorgoleone was mineralized in all soils tested. The methoxy group of sorgoleone was readily mineralized, whereas mineralization of the remaining molecule was slower. Mineralization kinetics indicated that microorganisms in American soils were able to use sorgoleone as a source of energy.
AB - The allelochemical sorgoleone is produced in and released from the root hairs of sorghum (Sorghum bicolor). Studies have confirmed that it is the release of sorgoleone that causes the phytotoxic properties of sorghum, and sorgoleone has a potential to become a new natural herbicide, or the weed suppressive activity of sorghum can be utilized in integrated weed management. Since sorgoleone is released into soil, knowledge of the fate of sorgoleone in soil is essential if it is to be utilized as an herbicide. Fate studies will characterize the persistence and mobility of the compound. Three types of radioactively labelled sorgoleone were produced and used to study mineralization (complete degradation to CO2) of this lipid benzoquinone in four soils, two from the United States of America (Mississippi) and two from Denmark. The studies showed that sorgoleone was mineralized in all soils tested. The methoxy group of sorgoleone was readily mineralized, whereas mineralization of the remaining molecule was slower. Mineralization kinetics indicated that microorganisms in American soils were able to use sorgoleone as a source of energy.
KW - Allelopathy
KW - Lipid benzoquinone
KW - Soil fate
KW - Sorghum
KW - Sorgoleone
UR - http://www.scopus.com/inward/record.url?scp=67651152590&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2009.04.048
DO - 10.1016/j.chemosphere.2009.04.048
M3 - Article
SN - 0045-6535
VL - 76
SP - 1041
EP - 1047
JO - Chemosphere
JF - Chemosphere
IS - 8
ER -