Relationships between common root rot, tillering, and yield loss in spring wheat and barley

Duczek, L. J.; Jones-Flory, L.L.

doi:10.1080/07060669309500816

Cited by 20 publications

(7 citation statements)

References 8 publications

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“…Diseased plants had fewer tillers resulting in reduced grain yield per plant. Similar results were reported by Fernandez et al (2014) and Duczek and Jones-Flory (1993), who found that wheat plants infected by C. sativus early in the season produced fewer tillers than those infected later in the season, which was refl ected in yield per plant. The current study also showed that the average response of wheat cultivars to CRR diff ered with the susceptibility level.…”

Section: Resultssupporting

confidence: 87%

Diverse responses of old, modern and landraces of Syrian wheat genotypes to common root rot under field conditions

Arabi

Al-Shehadah

Jawhar

2019

Hellenic Plant Protection Journal

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The yield response of widely grown cultivars and landraces of Syrian wheat challenged with common root rot (CRR: Cochliobolus sativus) was measured by comparing plots with and without artifi cial inoculation under experimental conditions in two consecutive seasons. The results showed that response to CRR diff ered depending on the susceptibility levels of the wheat cultivars, and that the disease signifi cantly (P<0.05) reduced grain yield, number of tillers and kernel weight. The diseased plants had fewer tillers which consequently reduced grain yield per plant. Yield losses of Triticum durum cultivars were higher than those of Triticum aestivum. In addition, the T. durum landrace Horani exhibited the best level of resistance to the disease, which indicates that this landrace might be a candidate donor for resistance in future breeding programmes. As CRR can dramatically reduce wheat grain yields under favorable conditions, management practices that reduce disease severity are highly recommended.

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Section: Resultssupporting

confidence: 87%

Diverse responses of old, modern and landraces of Syrian wheat genotypes to common root rot under field conditions

Arabi

Al-Shehadah

Jawhar

2019

Hellenic Plant Protection Journal

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“…Due to replacements of land‐race varieties by high‐yielding, rust‐resistant genotypes, wheat production is also threatened in parts of China (Chang and Wu, 1998). The pathogen also occurs in North and Latin America (Duczek and Jones‐Flory, 1994), Brazil (Mehta et al ., 1992), and, much less frequently, in parts of Europe (Kwasna, 1995) (Fig. 3).…”

Section: The Pathogenmentioning

confidence: 99%

Bipolaris sorokiniana, a cereal pathogen of global concern: cytological and molecular approaches towards better control‡

Kumar

Schäfer

Hückelhoven

et al. 2002

Molecular Plant Pathology

309

221

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Summary Bipolaris sorokiniana (teleomorph Cochliobolus sativus ) is the causal agent of common root rot, leaf spot disease, seedling blight, head blight, and black point of wheat and barley. The fungus is one of the most serious foliar disease constraints for both crops in warmer growing areas and causes significant yield losses. High temperature and high relative humidity favour the outbreak of the disease, in particular in South Asia's intensive ‘irrigated wheat–rice’ production systems. In this article, we review the taxonomy and worldwide distribution, as well as strategies to counteract the disease as an emerging threat to cereal production systems. We also review the current understanding of the cytological and molecular aspects of the interaction of the fungus with its cereal hosts, which makes B. sorokiniana a model organism for studying plant defence responses to hemibiotrophic pathogens. The contrasting roles of cell death and H 2O2 generation in plant defence during biotrophic and necrotrophic fungal growth phases are discussed.

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“…Multi-nucleate state, nuclear migration, and heterokaryosis are a few mechanisms giving rise to variability in the pathogen that propagates asexually in warm and humid climates (Chand et al, 2003 ; Pandey et al, 2008 ). South-east Asia (Saari, 1998 ), North and Latin America, Africa (Duczek and Jones-Flory, 1993 ), India (Joshi et al, 2002 ), China (Chang and Wu, 1998 ), and Brazil (Mehta, 1993 ) are few major affected areas where spot blotch have caused severe reduction in wheat production. On an average, wheat encounters a loss of 17% of yield due to spot blotch but as much as 70% in yield reduction has been reported when plants are infected during grain filling stage whereas, under epidemic conditions, losses may be as high as 100% (Sharma and Duveiller, 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Natural Variation in Elicitation of Defense-Signaling Associates to Field Resistance Against the Spot Blotch Disease in Bread Wheat (Triticum aestivum L.)

et al. 2018

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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 germplasm and biochemical traits that are deployable for spot blotch resistance in wheat along South-Asia.

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Relationships between common root rot, tillering, and yield loss in spring wheat and barley

Cited by 20 publications

References 8 publications

Diverse responses of old, modern and landraces of Syrian wheat genotypes to common root rot under field conditions

Diverse responses of old, modern and landraces of Syrian wheat genotypes to common root rot under field conditions

Bipolaris sorokiniana, a cereal pathogen of global concern: cytological and molecular approaches towards better control‡

Natural Variation in Elicitation of Defense-Signaling Associates to Field Resistance Against the Spot Blotch Disease in Bread Wheat (Triticum aestivum L.)

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