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Brassinosteroid enhances resistance to fusarium diseases of barley. | LitMetric

AI Article Synopsis

  • Fusarium pathogens significantly damage cereals like barley and wheat, causing yield loss and grain contamination with harmful mycotoxins.
  • The study investigates the effects of brassinosteroid (BR) hormones, particularly epibrassinolide (epiBL), on reducing Fusarium diseases, achieving an 86% decrease in Fusarium head blight severity and improved grain weight retention.
  • Microarray and gene expression analyses reveal that growth in epiBL-amended soil activates various protective plant genes related to defense, hormonal signaling, and photosynthesis, suggesting a beneficial role of BR in plant resistance to Fusarium pathogens.

Article Abstract

Fusarium pathogens are among the most damaging pathogens of cereals. These pathogens have the ability to attack the roots, seedlings, and flowering heads of barley and wheat plants with disease, resulting in yield loss and head blight disease and also resulting in the contamination of grain with mycotoxins harmful to human and animal health. There is increasing evidence that brassinosteroid (BR) hormones play an important role in plant defense against both biotic and abiotic stress agents and this study set out to determine if and how BR might affect Fusarium diseases of barley. Application of the epibrassinolide (epiBL) to heads of 'Lux' barley reduced the severity of Fusarium head blight (FHB) caused by Fusarium culmorum by 86% and reduced the FHB-associated loss in grain weight by 33%. Growth of plants in soil amended with epiBL resulted in a 28 and 35% reduction in Fusarium seedling blight (FSB) symptoms on the Lux and 'Akashinriki' barley, respectively. Microarray analysis was used to determine whether growth in epiBL-amended soil changed the transcriptional profile in stem base tissue during the early stages of FSB development. At 24 and 48 h post F. culmorum inoculation, there were 146 epiBL-responsive transcripts, the majority being from the 48-h time point (n = 118). Real-time reverse-transcription polymerase chain reaction analysis validated the results for eight transcripts, including five defense genes. The results of gene expression studies show that chromatin remodeling, hormonal signaling, photosynthesis, and pathogenesis-related genes are activated in plants as a result of growth in epiBL.

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Source
http://dx.doi.org/10.1094/PHYTO-05-13-0111-RDOI Listing

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