Plant Height Affects Fusarium Crown Rot Severity in Wheat

Liu, Y.X.; Yang, X.M.; Ma, Jun; Wei, Yuming; Zheng, Youliang; Ma, Hongxiang; Jinbao, Yao; Yan, Guijun; Wang, Y.G.; Manners, John M.; Liu, C.J.

doi:10.1094/phyto-05-10-0142

Cited by 40 publications

(43 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Clearly, crown and spikes have different structures and they are also exposed to different microenvironments (temperature and humidity) due to their different distances from the soil surface. Previous studies showed that these factors affect the development of both FHB [25] and FCR [26]. …”

Section: Discussionmentioning

confidence: 99%

Effects of Drought-Stress on Fusarium Crown Rot Development in Barley

Liu

2016

PLoS ONE

View full text Add to dashboard Cite

Fusarium crown rot (FCR), caused by various Fusarium species, is a chronic disease of cereals in many semi-arid regions worldwide. To clarify what effects drought-stress may have on FCR development, visual assessment, histological analysis and quantitative PCR were used to analyse the infection process of F. pseudograminearum in barley. This study observed for the first time that the severity of FCR symptom reflects the quantity of pathogens in infected tissues of barley under both drought-stressed and well-watered conditions. Drought-stress prolongs the initial infection phase but enhances the proliferation and spread of Fusarium pathogens after the initial infection phase. Under drought-stressed conditions, the invading hyphae were frequently observed to re-emerge from stomata and invade again the surrounding epidermis cells. Under the well-watered conditions, however, very few hyphae re-emerged from stomata and most infection was caused by hyphae intracellularly grown. It was also observed that drought-stress increased the length and density of trichomes dramatically especially in the susceptible genotypes, and that the length and density of trichomes were positively related to fungal biomass of F. pseudograminearum in plants.

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of Drought-Stress on Fusarium Crown Rot Development in Barley

Liu

2016

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…This is not only because only two isolines are involved for assessing the effect of a particular allele in a particular genetic background, but also because the genetic background determining morphological and phenological characters commonly influencing phenotypic assessments of quantitative traits is essentially fixed in NILs (Pumphrey et al 2007). For these reasons, NILs have been used intensively for investigating the effects of various genes of interest (Miedaner and Voss 2008;Liu et al 2010). NIL-derived populations, segregating primarily for a targeted locus, allow the conversion of a quantitative trait into a Mendelian factor, making the accurate location of a QTL possible .…”

Section: Introductionmentioning

confidence: 99%

Development of near-isogenic lines for a major QTL on 3BL conferring Fusarium crown rot resistance in hexaploid wheat

Yan

Liu

2011

Euphytica

Self Cite

View full text Add to dashboard Cite

By essentially fixing the genetic background, near-isogenic lines (NILs) are ideal for studies of the function of specific loci. We report in this paper the development of NILs for a major QTL located on the long arm of chromosome 3B conferring Fusarium crown rot (FCR) resistance in hexaploid wheat. These NILs were generated based on the method of the heterogeneous inbred family analysis. 13 heterozygous lines were initially selected from three segregating populations using a single SSR marker linked with the major FCR QTL. The two isolines for each of the putative NILs obtained showed no obvious morphological differences, but differences among the NIL pairs were large. Significant differences in FCR resistance between the isolines were detected for nine of the 13 putative NIL pairs. The presence of the FCR allele from the resistant parent reduced FCR severity by 29.3-63.9% with an average of 45.2% across these NILs. These NILs will be invaluable in further characterising this major FCR locus, in studying the mechanism of FCR resistance and in investigating possible interactions between FCR resistance and other traits of agronomic importance.

show abstract

“…Results from previous studies also show that all Rht genes, including those non-GA-responsive ones, affect FCR in wheat [12,18]. There is no ‘cause-and-effect’ that can be implied at this stage yet.…”

Section: Discussionmentioning

confidence: 91%

“…Many previous studies show that Rht genes, which may or may not produce DELLA proteins, co-locate with QTL conferring Fusarium head blight (FHB) and Fusarium crown rot (FCR) resistance [7-9]. Considering that accurate assessments for both FCR [10] and FHB [7] are difficult and that resistances to these diseases can be affected by many characteristics including plant height [11,12] and growth rate [13] which often segregate in populations used for QTL mapping, it is not difficult to understand why not all plant height QTL are coincident with those for FHB or FCR susceptibility [14,15]. …”

Section: Introductionmentioning

confidence: 99%

“…As a result, NILs are extensively used for analysing effects of a wide array of traits including possible effects of plant height on FHB and FCR. These studies have shown that all Rht genes, including those non-GA-responsive ones, affect FHB [11,15-17] and FCR [12,18] resistance in wheat. These results seem to suggest that the effects of plant height on these Fusarium diseases are unlikely related to DELLA genes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The non-gibberellic acid-responsive semi-dwarfing gene uzu affects Fusarium crown rot resistance in barley

et al. 2014

View full text Add to dashboard Cite

BackgroundStudies in Arabidopsis show that DELLA genes may differentially affect responses to biotrophic and necrophic pathogens. A recent report based on the study of DELLA-producing reduced height (Rht) genes in wheat and barley also hypothesized that DELLA genes likely increased susceptibility to necrotrophs but increased resistance to biotrophs.ResultsEffects of uzu, a non-GA (gibberellic acid)-responsive semi-dwarfing gene, on Fusarium crown rot (FCR) resistance in barley were investigated. Fifteen pairs of near isogenic lines for this gene were generated and assessed under two different temperature regimes. Similar to its impacts on plant height, the semi-dwarfing gene uzu also showed larger effects on FCR severity in the high temperature regime when compared with that in the low temperature regime.ConclusionsResults from this study add to the growing evidence showing that the effects of plant height on Fusarium resistances are unlikely related to DELLA genes but due to direct or indirect effects of height difference per se. The interaction between these two characteristics highlights the importance of understanding relationships between resistance and other traits of agronomic importance as the value of a resistance gene could be compromised if it dramatically affects plant development and morphology.

show abstract

Plant Height Affects Fusarium Crown Rot Severity in Wheat

Cited by 40 publications

References 26 publications

Effects of Drought-Stress on Fusarium Crown Rot Development in Barley

Effects of Drought-Stress on Fusarium Crown Rot Development in Barley

Development of near-isogenic lines for a major QTL on 3BL conferring Fusarium crown rot resistance in hexaploid wheat

The non-gibberellic acid-responsive semi-dwarfing gene uzu affects Fusarium crown rot resistance in barley

Contact Info

Product

Resources

About