About the Authors

Christopher J Hale

Affiliation Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California, United States of America

Jennifer L Stonaker

Affiliation Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California, United States of America

Stephen M Gross

Affiliation Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California, United States of America

Jay B Hollick

To whom correspondence should be addressed. E-mail: hollick@nature.berkeley.edu

Affiliation Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

CJH, JLS, and JBH conceived and designed the experiments. All authors performed the experiments and analyzed the data. CJH, JLS, SMG, and JBH contributed reagents/materials/analysis tools. CJH and JBH wrote the paper.