First Report of <i>Setosphaeria rostrata</i> Causing Brown Leaf Spot of Rice in Pakistan

Majeed, R. A.; Shahid, Ahmad Ali; Liaqat, Gulzaib; Saleem, Kamran; Asif, Muhammad; Shafiq, Muhammad; Haider, Muhammad Saleem; Noreen, M.

doi:10.1094/pdis-02-16-0220-pdn

Cited by 8 publications

(2 citation statements)

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“…In south western Iran, a new sugarcane leaf spot disease caused by E. rostratum was reported by Ahmedpour et al [42]. E. rostratum was recorded to be associated with leaf spot of rice in Malaysia [43,44] and a pathogen of rice brown spot in Pakistan [45]. E. rostratum has been reported as causal agent of leaf spots on Zea mays, Ananas comosus, Musa paradisiaca and Hevea brasiliensis in China [46].…”

Section: Effect Of Temperaturementioning

confidence: 98%

A First Record of Exserohilum rostratum as a New Pathogen Causing Bean Blight in Egypt.

Mf¹,

Attia²

2020

J Plant Pathol Microbiol

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Seedling blight of bean (Phaseolus vulgaris L.) was recorded in bean fields at five different localities in Beni Sweif Governorate, Egypt. Symptoms appeared as green dark to purplish-brown spots, with brown margins. The affected plant leaves were collected for mycological analysis. Percentage of disease incidence were 30%, 25%, 22%, 15% and 35% in El-Wasta, Nasser, Beni Sweif, Sumosta and Beba counties respectively. Leaf samples were surface sterilized and cultured on potato dextrose agar. The growing fungi were identified on morphological as well as on molecular basis. Microscopic examination revealed that the isolated organisms have the same characteristics of Exserohilum rostratum (Drechsler) Leonard & Suggs. Among the 30 fungal isolates collected from the five bean plantations, a representative isolate was grown for DNA extraction, PCR and rDNA sequencing. Universal primers targeting ITS regions of the rDNA were used for PCR and sequencing. Results confirmed that the sequences of these fungi showed close relationship with E. rostratum with 99.6% -100% similarity. The obtained sequences were deposited in the GenBank with accession numbers MT075801, MT071830, MT071831, MT071832, and MT071834. Pathogenicity tests confirmed that E. rostratum strains were pathogenic showing the same disease symptoms previously observed on bean plants in the study areas. The minimum temperature for spore germination was 5 °C, the optimum temperature was 35 °C, and the maximum temperature was 50 °C. On the other hand, conidial germination was stopped at both lower (3 °C) and higher (55 °C) temperatures. Studying the host range of the fungus showed that the pathogen was able to attack tomato, pepper, squash and potato beside common bean and watermelon.

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Section: Effect Of Temperaturementioning

confidence: 98%

A First Record of Exserohilum rostratum as a New Pathogen Causing Bean Blight in Egypt.

Mf¹,

Attia²

2020

J Plant Pathol Microbiol

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“…Several species of fungi such as Bipolaris oryzae, B. bicolor, B. indica, B. victoriae, B. zeicola (Motlagh and Kaviani, 2008;Aslam et al, 2021) and Exserohilum rostratum (Majeed et al, 2016;Toher et al, 2016; are responsible for BSR. In Burkina Faso, Bipolaris oryzae (syn.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and structure of Bipolaris oryzae and Exserohilum rostratum populations causing brown spot of rice in Burkina Faso based on genotyping-by-sequencing

et al. 2022

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In recent years, Brown spot disease of rice (BSR) has been observed on leaves and seeds of rice in all rice-growing areas of Burkina Faso. Bipolaris oryzae and Exserohilum rostratum are the main fungal species isolated from BSR infected tissues and they are frequently observed in the same field. However, we are lacking information on the genetic diversity and population structure of these fungi in Burkina Faso. The mode of reproduction is also unknown. The genetic diversity of isolates of B. oryzae (n=61) and E. rostratum (n=151), collected from major rice-growing areas of Burkina Faso, was estimated using genotyping-by-sequencing (GBS). The mean values for nucleotide diversity (π) were 1.9 x10-4 for B. oryzae and 4.8 x10-4 for E. rostratum. There is no genetic differentiation between the geographical populations of each species. The analysis of molecular variance revealed that 89% and 94% of the genetic variances were within the populations of B. oryzae and E. rostratum, respectively. For each species, four genetic clusters were identified by two clustering methods (DAPC and sNMF). The distribution of these genetic groups was independent of the geographical origin of the isolates. Evidence of recombination was detected in the populations of B. oryzae and E. rostratum. For B. oryzae balanced mating type ratios were supporting sexual reproduction. For E. rostratum overrepresentation of MAT1-2 isolates (79%) suggested a predominant asexual reproduction. This study provides important information on the biology and genetics of the two major fungi causing brown spot disease of rice in Burkina Faso.

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Characterization, pathogenicity and fungicide response of Exserohilum rostratum causing leaf spot on rice in Thailand

Boonkorn,

Tongsri,

Piasai

et al. 2024

Eur J Plant Pathol

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First Report of Setosphaeria rostrata Causing Brown Leaf Spot of Rice in Pakistan

Cited by 8 publications

References 1 publication

A First Record of Exserohilum rostratum as a New Pathogen Causing Bean Blight in Egypt.

A First Record of Exserohilum rostratum as a New Pathogen Causing Bean Blight in Egypt.

Genetic diversity and structure of Bipolaris oryzae and Exserohilum rostratum populations causing brown spot of rice in Burkina Faso based on genotyping-by-sequencing

Characterization, pathogenicity and fungicide response of Exserohilum rostratum causing leaf spot on rice in Thailand

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