About the Authors

Patricia M. Tilney

pmtilney@uj.ac.za

Affiliation Department of Botany and Plant Biotechnology, University of Johannesburg, Auckland Park, Johannesburg, South Africa

Abraham E. van Wyk

Affiliation Department of Plant Science, University of Pretoria, Pretoria, South Africa

Chris F. van der Merwe

Affiliation Laboratory for Microscopy and Microanalysis, University of Pretoria, Pretoria, South Africa

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PMT AEVW CFVDM. Performed the experiments: PMT CFVDM. Analyzed the data: PMT AEVW CFVDM. Contributed reagents/materials/analysis tools: PMT AEVW CFVDM. Wrote the paper: PMT AEVW CFVDM.