Repeatability of Barley Seedling Reaction to Spot Blotch and Common Root Rot

Wit

Cereal Research Communications

et al. 2019

Spot blotch of barley (Hordeum vulgare L.), caused by Bipolaris sorokiniana, is worldwide and economically one of the most important diseases. The structure of the B. sorokiniana population is not uniform. Within isolates of this species, there are strains that differ in virulence and aggressiveness. The aim of the study was to determine the variability of virulence within Polish isolates of B. sorokiniana and to test selected strains of this fungus terms of their pathogenicity in relation to different spring barley cultivars. The diversity of 70 Polish isolates of B. sorokiniana was determined based on the reaction of three spring barley test lines-Bowman, ND5883 and NDB12 with a certain susceptibility to infection by this pathogen and compared to three isolates of B. sorokiniana: ND93-1 classified to pathotype 0, ND85F-pathotype 1 and ND90Pr-pathotype 2. In the population of 70 isolates of B. sorokiniana, two pathotypes-0 (14 isolates) and 1 (56 isolates) were identified. The mean values of leaf infection index evaluated for lines-Bowman, ND5883 and NDB12 in the case

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Section: Introductionmentioning

confidence: 99%

Structure of Polish isolates ofBipolaris sorokinianaand effect of different pathotypes on spot blotch severity of selected spring barley cultivars

Wit

Cereal Research Communications

et al. 2019

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“…Taking into consideration the great harmfulness of B. sorokiniana as the pathogen of leaves and grains of barley cultivated in the world and in Poland [Kumar et al 2002, Arabi and Jawhar 2004, Wiewióra 2009, 2010, Al-Daoude et al 2013 and little information on the ability of this fungus to produce sterigmatocystin in infected grains, it was considered appropriate to carry out such studies.…”

Section: Introductionmentioning

confidence: 99%

THE INFLUENCE OF SPRING BARLEY GRAIN (Hordeum vulgare L.) INFECTION BY Bipolaris sorokiniana (Sacc.) Shoem. ON THE LEAF INFECTION AND GRAIN CONTAMINATION BY STERIGMATOCYSTIN

Acta.Sci.Pol.,Hortorum Cultus

Mielniczuk

et al. 2018

Bipolaris sorokiniana is a dangerous pathogen of plants from Poaceae family. A secondary metabolite with carcinogenic properties produced by this fungus is sterigmatocystin. A field experiment with inoculation of the grain of 9 spring barley genotypes with B. sorokiniana No. 36 was carried out in the years 2012-2014 in the Zamość region. Field observations revealed leaf spot caused by B. sorokiniana in all studied genotypes. In 2012, values of the leaf infection index varied from 21.88 (Oberek) to 48.12 (Hajduczek), in 2013 from 25.31 (Skald, Oberek) to 50.00 (STH 7910) and in 2014 from 21.88 (Oberek) to 50.00 (Hajduczek). In the experimental combination with B. sorokiniana, colonies of this fungus in the years 2012-2014 accounted for: 81.22%, 93.11% and 71.78%, respectively, and in control combination: 40.06%, 32.26% and 33.72%, respectively. The chemical analysis of grain of 9 barley genotypes obtained from plants in an experimental combination with B. sorokiniana in 2014, revealed the presence of sterigmatocystin in the genotypes: Hajduczek, Kormoran, Stratus and STH 7910. The sterigmatocystin concentration ranged from 5.39 ng•g-1 (STH 7910) to 67.05 ng•g-1 (Hajduczek). A statistically significant correlation was found between the value of the leaf infection index and the concentration of sterigmatocystin in the grain.

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Structure of polish isolates ofBipolaris sorokinianaand effect of different pathotypes on spot blotch severity of selected spring barley cultivars

Wit

Cereal Research Communications

et al. 2019