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Natural variation in elicitation of defense-signaling associates to field resistance against the spot blotch disease in bread wheat (Triticum aestivum L.)

Author: Sharma, S.
Author: Ranabir Sahu
Author: Sudhir Navathe
Author: Vinod Kumar Mishra
Author: Chand, R.
Author: Singh, P.K.
Author: Joshi, A.K
Author: Pandey, S.P.
Year: 2018
ISSN: 1664-462X
URI: https://hdl.handle.net/10883/19524
Abstract: Spot blotch, caused by the hemibiotropic fungus Bipolaris sorokiniana, is amongst the most damaging diseases of wheat. Still, natural variation in expression of biochemical traits that determine field resistance to spot blotch in wheat remain unaddressed. To understand how genotypic variations relate to metabolite profiles of the components of defense-signaling and the plant performance, as well as to discover novel sources of resistance against spot blotch, we have conducted field studies using 968 wheat genotypes at 5 geographical locations in South-Asia in 2 years. 46 genotypes were identified as resistant. Further, in independent confirmatory trials in subsequent 3 years, over 5 geographical locations, we re-characterized 55 genotypes for their resistance (above 46 along with Yangmai#6, a well characterized resistant genotype, and eight susceptible genotypes). We next determined time-dependent spot blotch-induced metabolite profiles of components of defense-signaling as well as levels of enzymatic components of defense pathway (such as salicylic acid (SA), phenolic acids, and redox components), and derived co-variation patterns with respect to resistance in these 55 genotypes. Spot blotch-induced SA accumulation was negatively correlated to disease progression. Amongst phenolic acids, syringic acid was most strongly inversely correlated to disease progression, indicating a defensive function, which was independently confirmed. Thus, exploring natural variation proved extremely useful in determining traits influencing phenotypic plasticity and adaptation to complex environments. Further, by overcoming environmental heterogeneity, our study identifies germplasmand biochemical traits that are deployable for spot blotch resistance in wheat along South-Asia.
Format: PDF
Language: English
Publisher: Frontiers
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Place of Publication: Switzerland
Issue: art. 636
Volume: 9
DOI: 10.3389/fpls.2018.00636
Keywords: Bipolaris sorokiniana
Keywords: Defense Signaling
Keywords: Natural Variation
Keywords: Salicylic Acid
Keywords: Syringic Acid
Keywords: Spot Blotch
dc.series.description: Cochliobolus sativus
Country of Focus: SOUTH ASIA
Agrovoc: COCHLIOBOLUS SATIVUS
Agrovoc: WHEAT
Agrovoc: INFECTIOUS DISEASES
Agrovoc: DISEASE RESISTANCE
Agrovoc: SALICYLIC ACIDS
Related Datasets: https://figshare.com/articles/Presentation_1_Natural_Variation_in_Elicitation_of_Defense-Signaling_Associates_to_Field_Resistance_Against_the_Spot_Blotch_Disease_in_Bread_Wheat_Triticum_aestivum_L_PDF/6274118
Related Datasets: https://figshare.com/articles/Table_1_Natural_Variation_in_Elicitation_of_Defense-Signaling_Associates_to_Field_Resistance_Against_the_Spot_Blotch_Disease_in_Bread_Wheat_Triticum_aestivum_L_XLSX/6274121
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Related Datasets: https://figshare.com/articles/Table_3_Natural_Variation_in_Elicitation_of_Defense-Signaling_Associates_to_Field_Resistance_Against_the_Spot_Blotch_Disease_in_Bread_Wheat_Triticum_aestivum_L_XLSX/6274127
Related Datasets: https://figshare.com/articles/Table_4_Natural_Variation_in_Elicitation_of_Defense-Signaling_Associates_to_Field_Resistance_Against_the_Spot_Blotch_Disease_in_Bread_Wheat_Triticum_aestivum_L_XLSX/6274130
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Related Datasets: https://figshare.com/articles/Table_6_Natural_Variation_in_Elicitation_of_Defense-Signaling_Associates_to_Field_Resistance_Against_the_Spot_Blotch_Disease_in_Bread_Wheat_Triticum_aestivum_L_XLSX/6274136
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Journal: Frontiers in Plant Science


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    Wheat - breeding, phytopathology, physiology, quality, biotech

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