Barberry plays an active role as an alternate host of Puccinia graminis in Spain

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2022Author
Villegas Tort, Dolors
Bartaula, Radhika
Luster, Douglas
Szabo, Les
Olivera, Pablo
Berlin, Anna
Rodriguez-Algaba, Julian
Hovmøller, Mogens S.
McIntosh, Robert
Jin, Yue
Suggested citation
Villegas Tort, Dolors;
Bartaula, Radhika;
Cantero-Martínez, Carlos;
Luster, Douglas;
Szabo, Les;
Olivera, Pablo;
...
Jin, Yue.
(2022)
.
Barberry plays an active role as an alternate host of Puccinia graminis in Spain.
Plant pathology, 2022, p.1-11.
https://doi.org/10.1111/ppa.13540.
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Stem rust, caused by Puccinia graminis, is a destructive group of diseases. The patho -
gen uses Berberis species as alternate hosts to complete its life cycle. B. vulgaris and
the endemic species B. hispanica and B. garciae are present in Spain. The objective of
this study was to investigate the functionality of the indigenous barberry as alternate
hosts. Field surveys were conducted in 2018 and 2019 in Huesca, Teruel and Albacete
provinces of Spain. Aecial samples on barberry were analysed via infection assays
and DNA analysis. B. garciae was predominant in Huesca and Teruel provinces, often
found in the field margins of cereal crops. Aecial infections on B. garciae were ob-
served in May and uredinial infections on cereal crops in June. Scattered B. hispanica
bushes were occasionally found near cereal crops in Albacete, where aecial infections
on B. hispanica were observed in June when most cereal crops were mature. Infection
assays using aeciospores resulted in stem rust infections on susceptible genotypes of
wheat, barley, rye and oat, indicating the presence of the sexual cycle for P. graminis
f. sp. tritici, f. sp. secalis and f. sp. avenae. Sequence analyses from aecial samples sup-
ported this finding as well as the presence of Puccinia brachypodii. This study provides
the first evidence that indigenous Berberis species play an active role in the sexual
cycle of P. graminis under natural conditions in Spain
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Plant pathology, 2022, p.1-11European research projects
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