2013
DOI: 10.13080/z-a.2013.100.025
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Biochemical and histochemical parameters associated with slow blighting of spot blotch (Bipolaris sorokiniana (Sacc.) Shoem.) in wheat (Triticum spp.)

Abstract: Spot blotch caused by Bipolaris sorokiniana is a destructive disease of wheat (Triticum spp.) in warm and humid wheat growing regions of the world. Area under the disease progress curve (AUDPC) in field experiment was used to find out the role of total phenol content (TPC), phenylalanine ammonia-lyase (PAL) activity and lignin deposition in the development of slow blight. Ten recombinant inbred lines (RILs) of spring wheat obtained from the cross between the susceptible parent 'Sonalika' and the resistant pare… Show more

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Cited by 13 publications
(11 citation statements)
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“…Correspondingly, phenolic compounds were elicited after spot blotch infection and their level was significantly high in resistant genotypes than susceptible. Similar changes in overall phenolics content upon spot blotch infection were recorded for resistant recombinant inbred lines (RILs) of wheat (Eisa et al, 2013 ; Sahu et al, 2016b ), which further supported their role in spot blotch resistance. Interestingly, syringic acid not only inhibited the growth of spot blotch pathogens in vitro , its application to the susceptible (Sonalika) plants complemented resistance and significantly reduced the disease (Figure 6 ).…”
Section: Discussionsupporting
confidence: 59%
“…Correspondingly, phenolic compounds were elicited after spot blotch infection and their level was significantly high in resistant genotypes than susceptible. Similar changes in overall phenolics content upon spot blotch infection were recorded for resistant recombinant inbred lines (RILs) of wheat (Eisa et al, 2013 ; Sahu et al, 2016b ), which further supported their role in spot blotch resistance. Interestingly, syringic acid not only inhibited the growth of spot blotch pathogens in vitro , its application to the susceptible (Sonalika) plants complemented resistance and significantly reduced the disease (Figure 6 ).…”
Section: Discussionsupporting
confidence: 59%
“…The pathogen colonizes the host tissue by 24 hpi; hyphae produce conidiophores that emerge out of the host, giving rise to a succession of conidia by 4 days (Figure ). In order to study molecular responses of wheat host to B. sorokiniana pathogen, we used two contrasting genotypes, Yangmai #6, a highly resistant, and Sonalika, a highly susceptible cultivar (Eisa et al ., ; Kumar et al ., ). Under continuous moisture and average temperatures above 18°C, pathogenic spots were visible on the leaf surface by 4 days post inoculation (dpi) that progressed to form blotches by 7 dpi on the susceptible cultivar, Sonalika (Figure ).…”
Section: Resultsmentioning
confidence: 98%
“…Establishment and germination of spore pathogen, we used two contrasting genotypes, Yangmai #6, a highly resistant, and Sonalika, a highly susceptible cultivar (Eisa et al, 2013;Kumar et al, 2013). Under continuous moisture and average temperatures above 18°C, pathogenic spots were visible on the leaf surface by 4 days post inoculation (dpi) that progressed to form blotches by 7 dpi on the susceptible cultivar, Sonalika (Figure 1).…”
Section: Landing Of Spore On Leaf Surfacementioning
confidence: 99%
“…The SA accumulation, in turn, may signal the recruitment of a range of secondary metabolites that inhibit the growth of the pathogen. Many compounds may be phenolic‐based compounds that are known to be toxic to B. sorokiniana (Eisa et al ., ). It has also been shown that SA and JA signalling function in a synergistic manner in the case of spot blotch, although these are antagonistic in several other pathosystems (Pieterse et al ., ).…”
Section: Mechanism Of Spot Blotch Resistancementioning
confidence: 97%
“…In response to B. sorokiniana infection, the host produces a range of secondary metabolites, which are toxic to the pathogen or are inhibitory to the toxins produced by the pathogen (Wink, ). The level of resistance to spot blotch in bread wheat, durum wheat, emmer wheat and barley has also been correlated with a number of biochemical constituents, including total content of phenolics, lignin, protein, reducing sugars, chlorophyll, and phenylalanine ammonia‐lyase (PAL) (Peltonen & Karjalainen, ; Marigoudra et al ., ; Eisa et al ., ; Yusuf et al ., ). Some of these chemicals such as lignin, when produced locally, strengthen the cell wall through lignification, rendering them more resistant.…”
Section: Mechanism Of Spot Blotch Resistancementioning
confidence: 99%