Dynamic Precision Phenotyping Reveals Mechanism of Crop Tolerance to Root Herbivory

The western corn rootworm (WCR) is a major pest of maize that is well adapted to most crop management strategies. Breeding for tolerance is a promising alternative to combat WCR, but is currently constrained by a lack of physiological understanding and phenotyping tools. We developed dynamic precision phenotyping approaches using carbon-11 with positron emission tomography, root autoradiography and radiometabolite flux analysis to understand maize tolerance to WCR. Our results reveal that WCR attack induces specific patterns of lateral root growth which are associated with a shift in auxin biosynthesis from indole-3-pyruvic acid to indole-3-acetonitrile. WCR attack also increases transport of newly synthesized amino acids to the roots, including the accumulation of glutamine. Finally, the regrowth zones of WCR attacked roots show an increase in glutamine turnover which strongly correlates with the induction of indole-3-acetonitrile-dependent auxin biosynthesis. In summary, our findings identify local changes in the auxin flux network as a promising marker for induced WCR tolerance.

HVOSM studies of cross-slope breaks on highway curves. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Study to determine availability of parts at dealers during a recall campaign. Final report.

National Highway Traffic Safety Administration, Office of Defects Investigation, Washington, D.C.

Systems feasibility study: states' assistance in defect recall campaigns. Final report, Volume I.

National Highway Traffic Safety Administration, Washington, D.C.

Systems feasibility study: states' assistance in defect recall campaigns. Final report, Volume II.

National Highway Traffic Safety Administration, Washington, D.C.

Systems feasibility study: states' assistance in defect recall campaigns. Final report, Volume III.

National Highway Traffic Safety Administration, Washington, D.C.

Systems feasibility study: states' assistance in defect recall campaigns. Final report, Volume IV.

National Highway Traffic Safety Administration, Washington, D.C.

Precision and accuracy assessments for state and local air monitoring networks, 1981-1986 /

Mode of access: Internet.

Motor vehicle defects and recall campaigns.

Mode of access: Internet.

Optimal application and placement of roadside reflective devices for curves on two-lane rural highways. Final report.

Ohio Department of Transportation, Columbus

Plane curves of the third order /

Includes bibliographical references and index.

Motor vehicle safety defect recall campaigns from January 1, 1971 to December 31, 1971; reported to the National Highway Traffic Safety Administration by domestic and foreign vehicle manufacturers.

Mode of access: Internet.

Motor vehicle safety defect recall campaigns reported to the National Highway Traffic Safety Administration by domestic and foreign vehicle manufacturers, January 1, 1972 to December 31, 1972.

Mode of access: Internet.

Motor vehicle safety defect recall campaigns reported to the National Highway Traffic Safety Administration by domestic and foreign vehicle manufacturers. January 1, 1973 to December 31, 1973.

Mode of access: Internet.

Motor vehicle safety defect recall campaigns reported to the National Highway Traffic Safety Administration by domestic and foreign vehicle manufacturers. January 1, 1974 to December 31, 1974.

Mode of access: Internet.