Leaf rust on Aegilops speltoides caused by a new forma specialis of Puccinia triticina

Pnina Ben Yehuda, Tamar Eilam, Jacob Manisterski, Ayelet Shimoni, Yehoshua Anikster*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A leaf rust attacking Aegilops speltoides in its natural habitat is reported for the first time. It was found in two locations in northern and central Israel. The two collections from A. speltoides resemble wheat leaf rust, Puccinia triticina, in most spore dimensions, in the morphology of the substomatal vesicle of the urediniospore, and in DNA content in pycniospore nuclei. Similarly to P. triticina isolates from wheat, isolates taken from A. speltoides are compatible with Thalictrum speciosissimum as an aecial host and they are crossed easily with wheat leaf rust isolates. However, isolates from A. speltoides differ from wheat leaf rust in their telial host range. They are avirulent to cultivated wheat cultivars, but attack hundreds of A. speltoides accessions that were immune to wheat leaf rust. This distinct host preference justifies delineation of the newly found leaf rust as a forma specialis (f. sp. speltoides) within P. triticina.

Original languageEnglish
Pages (from-to)94-101
Number of pages8
JournalPhytopathology
Volume94
Issue number1
DOIs
StatePublished - Jan 2004

Keywords

  • Basidiospores
  • Teliospore germination

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