Comparisons of Ectomycorrhizal Colonization of Transgenic American Chestnut with Those of the Wild Type, a Conventionally Bred Hybrid, and Related Fagaceae Species

Katherine M. D'Amico, Thomas R. Horton, Charles A. Maynard, Stephen V. Stehman, Allison D. Oakes, William A. Powell
  • Applied and Environmental Microbiology, October 2014, ASM Journals
  • DOI: 10.1128/aem.02169-14

Mycorrhizal Colonization of Transgenic American Chestnut

What is it about?

This study determined that there were no significant differences in beneficial mycorrhizal colonization on the roots of the Darling 4 transgenic American chestnut compared to conventionally bred chestnut trees or other related species used in the study.

Why is it important?

This is one in a series of studies to confirm that the transgenic American chestnut trees with enhanced blight resistance are not significantly different than the wild type except for resistance.


Dr William A Powell

The oxalate detoxifying enzyme gene was carefully chosen for the American chestnut tree because it has no anti-fungal activity. Instead it breaks down the oxalate used by the pathogen to help it infect the chestnut tree. Because of this targeted defense mechanism, it is not expected to effect non-target fungi and this study supports that hypothesis.

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The following have contributed to this page: Dr William A Powell