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. 2016 Feb 24;7:205. doi: 10.3389/fpls.2016.00205

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Copyright © 2016 Figueroa, Upadhyaya, Sperschneider, Park, Szabo, Steffenson, Ellis and Dodds.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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P. graminis f. sp. tritici (Pgt) infected wheat and barley. (A) Close-up of a Pgt uredinium after eruption through the epidermis of a barley stem. (B) Sporulation of African Pgt race PTKST on wheat (C) Sporulation of African Pgt race PTKST on barley. (D) Severe straw breakage of a susceptible wheat line (front) caused by heavy stem rust infection in comparison with a resistant wheat line (back) growing in a disease screening nursery in Kenya in 2008. Images (A,D) were taken by David Hansen/Brian Steffenson and (B,C) by Zacharias Pretorius.