About the Authors

Mark M. Littler

littlerm@si.edu

Affiliation Department of Botany, Smithsonian Institution, Washington, D. C., United States of America

Diane S. Littler

Affiliation Department of Botany, Smithsonian Institution, Washington, D. C., United States of America

Barrett L. Brooks

Affiliation Department of Botany, Smithsonian Institution, Washington, D. C., United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MML DSL BLB. Performed the experiments: MML DSL BLB. Analyzed the data: BLB. Contributed reagents/materials/analysis tools: BLB. Wrote the paper: MML DSL.