scholarly journals Powdery Mildew Disease Resistance

2010 ◽  
Author(s):  
Shauna C. Somerville
Keyword(s):  
Disease Resistance ◽  
Powdery Mildew ◽  
Powdery Mildew Disease

scholarly journals Powdery mildew disease resistance and marker-assisted screening at the Pm60 locus in wild diploid wheat Triticum urartu

2020 ◽  
Vol 8 (2) ◽  
pp. 252-259
Author(s):  
Fukai Zhao ◽  
Yinghui Li ◽  
Baoju Yang ◽  
Hongbo Yuan ◽  
Cong Jin ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Powdery Mildew ◽  
Diploid Wheat ◽  
Triticum Urartu ◽  
Powdery Mildew Disease

Powdery mildew-resistant UG3 and UG4 rutabaga germplasm

1993 ◽  
Vol 73 (1) ◽  
pp. 301-302 ◽  
Author(s):  
V. I. Shattuck
Keyword(s):  
Disease Resistance ◽  
Brassica Napus ◽  
Powdery Mildew ◽  
Key Words ◽  
Root Morphology ◽  
Average Weight ◽  
Powdery Mildew Disease

UG3 and UG4 rutabaga (Brassica napus ssp. rapifera) germplasm lines are highly resistant to powdery mildew, and are suitable for developing powdery mildew-resistant B. napus cultivars. The lines were derived from a powdery mildew-resistant rutabaga mutant. Both lines are self-fertile, yield average weight roots that store well, but lack optimal root morphology. Key words: Rutabaga, germplasm, powdery mildew, disease resistance

scholarly journals Quantitative Trait Loci Analysis of Powdery Mildew Disease Resistance in the Arabidopsis thaliana Accession Kashmir-1

Genetics ◽  
2001 ◽  
Vol 158 (3) ◽  
pp. 1301-1309 ◽  
Author(s):  
Iain W Wilson ◽  
Céline L Schiff ◽  
Douglas E Hughes ◽  
Shauna C Somerville
Keyword(s):  
Arabidopsis Thaliana ◽  
Disease Resistance ◽  
Quantitative Trait Loci ◽  
Powdery Mildew ◽  
Quantitative Trait ◽  
Recombinant Inbred Lines ◽  
Trait Loci ◽  
Powdery Mildew Disease ◽  
Model Plant Arabidopsis Thaliana ◽  
Chromosome Iii

Abstract Powdery mildew diseases are economically important diseases, caused by obligate biotrophic fungi of the Erysiphales. To understand the complex inheritance of resistance to the powdery mildew disease in the model plant Arabidopsis thaliana, quantitative trait loci analysis was performed using a set of recombinant inbred lines derived from a cross between the resistant accession Kashmir-1 and the susceptible accession Columbia glabrous1. We identified and mapped three independent powdery mildew quantitative disease resistance loci, which act additively to confer disease resistance. The locus with the strongest effect on resistance was mapped to a 500-kbp interval on chromosome III.

scholarly journals Differential Responses of Cucurbita pepo to Podosphaera xanthii Reveal the Mechanism of Powdery Mildew Disease Resistance in Pumpkin

2021 ◽  
Vol 12 ◽  
Author(s):  
Shuwu Zhang ◽  
Jia Liu ◽  
Bingliang Xu ◽  
Jingjiang Zhou
Keyword(s):  
Gene Expression ◽  
Disease Resistance ◽  
Powdery Mildew ◽  
Signaling Pathway ◽  
Cucurbita Pepo ◽  
Total Phenolics ◽  
Defense Enzymes ◽  
Podosphaera Xanthii ◽  
Ros Scavenging ◽  
Powdery Mildew Disease

Powdery mildew is one of the most destructive diseases and the major cause to the production losses of cucurbit worldwide. A number of strategies have been developed and applied to discover suitable and safer methods to manage the occurrence of powdery mildew disease in pumpkins (Cucurbita pepo L.), but information is limited in screening tolerant germplasms and exploring their mechanisms in preventing the disease occurrence at physiological, biochemical, and molecular levels. Therefore, we investigated the responses of two commercial pumpkin cultivars to Podosphaera xanthii infection. Compared with mock-inoculated seedlings, few small and sparse powdery areas were observed on the leaves of the Sixing F1 cultivar on the 13th day after inoculation with P. xanthii, whereas a large number of diseased powdery areas and a layer of white powdery mildew were observed on the surface of Jin12 F1 leaves. The inoculation duration (7, 9, 11, and 13 days) significantly and continuously increased the disease incidence and index of pumpkin seedlings. The contents of H2O2, MDA, lignin, and total phenolics in the leaves of Sixing F1 and Jin12 F1 cultivars were markedly increased after inoculation with P. xanthii. However, the Sixing F1 cultivar exhibited much less reactive oxygen species (ROS) accumulation, a lower rate of lipid peroxidation, and a higher level of lignin and total phenolics contents after inoculation than the Jin12 F1 cultivar. Compared with untreated control pumpkin seedlings, significantly higher activities and gene expressions of the phenylpropanoids pathway enzymes (PAL and PPO), ROS scavenging defense enzymes (SOD, CAT, POD, and APX), and other salicylic acid (SA) signaling pathway marker genes were observed in the leaves of both cultivars after P. xanthii inoculation at different inoculation time points. These enhancements were significantly higher in Sixing F1 than Jin12 F1. Our results indicate that the Sixing F1 cultivar exhibited a much stronger ability in resistance to P. xanthii infection than the Jin12 F1 cultivar. Our results suggest that one possible mechanism of C. pepo cultivars to prevent the pathogen P. xanthii infection is by activating and enhancing the activity and gene expression of the phenylpropanoids pathway to synthesize phenolic substances and lignin, ROS scavenging defense enzymes to eliminate the harmful effects of ROS, and signaling pathway marker gene expression to improve plant disease resistance.

Incidence of powdery mildew on cucurbit plants in Katsina, Nigeria

2019 ◽  
pp. 05-09
Keyword(s):  
Powdery Mildew ◽  
Low Cost ◽  
Frequency Of Occurrence ◽  
Sphaerotheca Fuliginea ◽  
Causal Organism ◽  
Powdery Mildews ◽  
Powdery Mildew Disease ◽  
Important Disease

The presence study deals with powdery mildews in various cucurbits in Katsina city (Barhim Estate, Kofar Durbi, Kofar Sauri, Kofar Marusa and Low Cost), Nigeria. The finding shows that the areas infested with powdery mildew is one of the important disease of cucurbits. The Sphaerotheca fuliginea was identified to be the causal organism present on all observed cucurbits in the study. Highest frequency of disease was found in Kofar Sauri(79%) fallowed by Kofar Marusa (68%), Kofar Durbi (66%), Barhim Estate (65%) and the lowest frequency of occurrence of disease was found in Low Cost (55%).The intensity of the disease was moderate to severe in general but it was high in many fields, the area-wise variation was also noticed. On vegetables, the highest frequency of occurrence of powdery mildew disease was observed on L. cylindrica (76.4%) followed by C. moschata (60%), C. sativus (59.3%), C. vulgaris (53.9%) and lowest was found on C. melo (44.4%). The highest intensity of disease was found on C. moschata, followed by L. cylindrica, C. sativus, C. vulgaris and C. melo.

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