Association or Mixed Infection of Downy Mildew and White Rust Disease Complex

2017 ◽  
pp. 199-213
Author(s):  
Govind Singh Saharan ◽  
Naresh Mehta ◽  
Prabhu Dayal Meena
Keyword(s):  
Downy Mildew ◽  
Mixed Infection ◽  
Rust Disease ◽  
Disease Complex ◽  
White Rust

scholarly journals Genomic and Molecular Perspectives of Host-pathogen Interaction and Resistance Strategies against White Rust in Oilseed Mustard

2020 ◽  
Vol 21 (3) ◽  
pp. 179-193
Author(s):  
Chatterjee Anupriya ◽  
Nirwan Shradha ◽  
Bandyopadhyay Prasun ◽  
Agnihotri Abha ◽  
Sharma Pankaj ◽  
...  
Keyword(s):  
Crop Protection ◽  
Resistance Mechanism ◽  
Pathogen Resistance ◽  
Susceptibility Genes ◽  
Rust Disease ◽  
Disease Response ◽  
White Rust ◽  
Oilseed Brassicas ◽  
Insight Into

: Oilseed brassicas stand as the second most valuable source of vegetable oil and the third most traded one across the globe. However, the yield can be severely affected by infections caused by phytopathogens. White rust is a major oomycete disease of oilseed brassicas resulting in up to 60% yield loss globally. So far, success in the development of oomycete resistant Brassicas through conventional breeding has been limited. Hence, there is an imperative need to blend conventional and frontier biotechnological means to breed for improved crop protection and yield. : This review provides a deep insight into the white rust disease and explains the oomycete-plant molecular events with special reference to Albugo candida describing the role of effector molecules, A. candida secretome, and disease response mechanism along with nucleotide-binding leucine-rich repeat receptor (NLR) signaling. Based on these facts, we further discussed the recent progress and future scopes of genomic approaches to transfer white rust resistance in the susceptible varieties of oilseed brassicas, while elucidating the role of resistance and susceptibility genes. Novel genomic technologies have been widely used in crop sustainability by deploying resistance in the host. Enrichment of NLR repertoire, over-expression of R genes, silencing of avirulent and disease susceptibility genes through RNA interference and CRSPR-Cas are technologies which have been successfully applied against pathogen-resistance mechanism. The article provides new insight into Albugo and Brassica genomics which could be useful for producing high yielding and WR resistant oilseed cultivars across the globe.

Puccinia horiana. [Descriptions of Fungi and Bacteria].

1968 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Great Britain ◽  
Geographical Distribution ◽  
Severe Infection ◽  
Complete Loss ◽  
Rust Disease ◽  
White Rust ◽  
Chrysanthemum Indicum ◽  
Water Splash ◽  
Rapid Spread ◽  
Puccinia Horiana

Abstract A description is provided for Puccinia horiana. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Chrysanthemum indicum, C. japonense, C. makinoi, C. makinoi var. wakasaense, C. morifolium var. sinense, C. shiwagiku, C. shiwagiku var. kinokuniense and by inoculation on C. arcticum subsp. maekawanum, C. boreale, C. nipponicum, C. pacificum and C. yoshinaganthum (Hiratsuka, 1957). DISEASE: White rust disease of chrysanthemum. First noticed as yellow spots on the upper surface, the centres of the spots later turn brown. On the underside of the leaves, raised buff, pinkish, waxy pustules develop which later turn whitish and become quite prominent. Severe infection leads to complete loss of crop. GEOGRAPHICAL DISTRIBUTION: Africa (South Africa); Asia (China, Japan); Australasia (New Zealand); Europe (Austria, Belgium, Denmark, France, Great Britain, Finland, Germany, Netherlands, Norway, Sweden). (CMI Map 403, Ed. 2, 1966) TRANSMISSION: Sporidia disseminated by water splash account for the spread in individual plants. Importation of infected plants accounts for its rapid spread in new territories.

Studies on chemical control of white rust disease of mustard

1996 ◽  
Vol 42 (1) ◽  
pp. 61-65
Author(s):  
J. N. Bhatia ◽  
S. Gangopadhyay
Keyword(s):  
Chemical Control ◽  
Rust Disease ◽  
White Rust

scholarly journals Chrysanthemum WRKY15-1 promotes resistance to Puccinia horiana Henn. via the salicylic acid signaling pathway

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mengmeng Bi ◽  
Xueying Li ◽  
Xin Yan ◽  
Di Liu ◽  
Ge Gao ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Expression Patterns ◽  
Homologous Gene ◽  
Susceptible Cultivar ◽  
Rust Disease ◽  
Resistance Response ◽  
Real Time Quantitative Pcr ◽  
White Rust ◽  
Increased Sensitivity ◽  
Puccinia Horiana

AbstractChrysanthemum white rust disease, which is caused by the fungus Puccinia horiana Henn., severely reduces the ornamental quality and yield chrysanthemum. WRKY transcription factors function in the disease-resistance response in a variety of plants; however, it is unclear whether members of this family improve resistance to white rust disease in chrysanthemum. In this study, using PCR, we isolated a WRKY15 homologous gene, CmWRKY15-1, from the resistant chrysanthemum cultivar C029. Real-time quantitative PCR (RT-qPCR) revealed that CmWRKY15-1 exhibited differential expression patterns between the immune cultivar C029 and the susceptible cultivar Jinba upon P. horiana infection. In addition, salicylic acid (SA) treatment strongly induced CmWRKY15-1 expression. Overexpression of CmWRKY15-1 in the chrysanthemum-susceptible cultivar Jinba increased tolerance to P. horiana infection. Conversely, silencing CmWRKY15-1 via RNA interference (RNAi) in C029 increased sensitivity to P. horiana infection. We also determined that P. horiana infection increased both the endogenous SA content and the expression of salicylic acid biosynthesis genes in CmWRKY15-1-overexpressing plants, whereas CmWRKY15-1 RNAi plants exhibited the opposite effects under the same conditions. Finally, the transcript levels of pathogenesis-related (PR) genes involved in the SA pathway were positively associated with CmWRKY15-1 expression levels. Our results demonstrated that CmWRKY15-1 plays an important role in the resistance of chrysanthemum to P. horiana by influencing SA signaling.

scholarly journals STUDY ON AN Ambrosia ISOLATE OF Plasmopara halstedii / ESTUDIO DE UN AISLADO DEL HONGO Plasmopara halstedii EN LA ESPECIE Ambrosia / ÉTUDE D’UN ISOLAT DU CHAMPIGNON Plasmopara halstedii SUR L’ESPÈCE Ambrosia

Helia ◽  
2000 ◽  
Vol 23 (33) ◽  
pp. 19-24
Author(s):  
Ilona Walcz ◽  
Katalin Bogár ◽  
Ferenc Virányi
Keyword(s):  
Downy Mildew ◽  
Disease Symptoms ◽  
Plasmopara Halstedii ◽  
White Rust

SUMMARY In 1998, a number of Ambrosia artemisifolia individuals located in the vicinity of a sunflower breeding nursery at Bicsérd, south Hungary, showed disease symptoms resembling downy mildew and/or white rust. Sporangia of both Plasmopara and Albugo have been isolated from the affected plants. Microscopical observations and subsequent inoculation experiments revealed the existence of Plasmopara halstedii on the affected A.artemisifolia plants. Following inoculations on a set of sunflower differentials, the Ambrosia isolates of P.halstedii consistently showed a virulence formula of 730 that is equal to pathotype 4.

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