scholarly journals Scarcity of Major Resistance Genes Against Verticillium Dahliae

2021 ◽  
Author(s):  
Jasper P. Vermeulen ◽  
Katharina Hanika ◽  
Bart P.H.J. Thomma ◽  
Yuling Bai ◽  
Henk J Schouten
Keyword(s):  
Resistance Genes ◽  
Verticillium Dahliae ◽  
Fungal Pathogen ◽  
Wilt Disease ◽  
Discriminative Power ◽  
Vascular Wilt ◽  
Virulent Strains ◽  
Canopy Area ◽  
Major Resistance Genes ◽  
Vascular Wilt Disease

Abstract Verticillium dahliae is a soil-borne fungal pathogen that causes vascular wilt disease in numerous plant species. The only described qualitative resistances against V. dahliae are the Ve1 gene and the V2 locus in tomato. These resistances have been overcome by virulent strains. We tried to identify additional resistances. Out of the methods we tested, comparing the canopy area of V. dahliae-inoculated plants with mock-inoculated plants yielded the best discriminative power in resistance tests. Out of six wild tomato accessions that were previously reported to possess some resistance, Solanum pimpinellifolium G1.1596 and S. cheesmanii G1.1615 displayed the lowest stunting and the least colonization by V. dahliae. Recombinant inbred line (RIL) populations were developed of both populations. No QTLs were identified in the G1.1596 RIL population. In the G1.1615 population, four small-effect QTLs were associated with reduced stunting. Many studies in other hosts also failed to discover major resistance genes against V. dahliae. We hypothesize that the scarcity of major resistance genes against V. dahliae is caused by its endophytic behaviour in nature. The limited damage in nature would not lead to evolutionary pressure to evolve major resistances. However, in agriculture V. dahliae can behave more pathogenic, leading to serious damage.

scholarly journals Genome and Transcriptome Analysis of the Fungal Pathogen Fusarium oxysporum f. sp. cubense Causing Banana Vascular Wilt Disease

PLoS ONE ◽  
2014 ◽  
Vol 9 (4) ◽  
pp. e95543 ◽  
Author(s):  
Lijia Guo ◽  
Lijuan Han ◽  
Laying Yang ◽  
Huicai Zeng ◽  
Dingding Fan ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Transcriptome Analysis ◽  
Fungal Pathogen ◽  
Wilt Disease ◽  
Vascular Wilt ◽  
Vascular Wilt Disease

Hymenula cerealis (Cephalosporium stripe).

2021 ◽  
Author(s):  
Timothy D. Murray
Keyword(s):  
Invasive Species ◽  
Wilt Disease ◽  
Cereal Grains ◽  
Vascular Wilt ◽  
Single Cycle ◽  
Per Se ◽  
Vascular Wilt Disease

Abstract H. cerealis is a pathogen that causes a vascular wilt disease of gramineous hosts known as Cephalosporium stripe. It is the only known vascular wilt of small grasses and small cereal grains with a fungal aetiology. It causes what is referred to as a 'single-cycle' disease because it does not have an airborne, repeating phase. As such, it is not an invasive species per se.

Vascular Wilt of Common Naranjilla (Solanum quitoense) Caused by Fusarium oxysporum in Ecuador

2001 ◽  
Vol 2 (1) ◽  
pp. 15 ◽  
Author(s):  
J. B. Ochoa ◽  
B. Yangari ◽  
V. Galarza ◽  
J. Fiallos ◽  
M. A. Ellis
Keyword(s):  
Fusarium Oxysporum ◽  
Wilt Disease ◽  
Vascular Wilt ◽  
Major Constraint ◽  
Vascular Wilt Disease

Farmers have generally abandoned production of “common naranjilla” in many areas mainly due to uncontrollable epidemics of an apparent vascular wilt disease. Naranjilla vascular wilt (NVW) and is currently the major constraint to the production of naranjilla in Ecuador, where losses due to NVW may reach up to 80%. Accepted for publication 13 September 2001. Published 18 September 2001.

scholarly journals Fusarium oxysporum f. sp. lycopersici causal agent of vascular wilt disease of tomato: Biology to diversity– A review

2019 ◽  
Vol 26 (7) ◽  
pp. 1315-1324 ◽  
Author(s):  
C. Srinivas ◽  
D. Nirmala Devi ◽  
K. Narasimha Murthy ◽  
Chakrabhavi Dhananjaya Mohan ◽  
T.R. Lakshmeesha ◽  
...  
Keyword(s):  
Fusarium Oxysporum ◽  
Wilt Disease ◽  
Causal Agent ◽  
Vascular Wilt ◽  
Vascular Wilt Disease

scholarly journals Use of Trichoderma Hamatum for Biocontrol of Lentil Vascular Wilt Disease: Efficacy, Mechanisms of Interaction And Future Prospects

2013 ◽  
Vol 53 (1) ◽  
pp. 12-26 ◽  
Author(s):  
Saïd A. El-Hassan ◽  
Simon R. Gowen ◽  
Barbara Pembroke
Keyword(s):  
Vascular Tissue ◽  
Turgor Pressure ◽  
Wilt Disease ◽  
Ecological Niches ◽  
Plant Colonization ◽  
Conidial Suspension ◽  
Vascular Wilt ◽  
Trichoderma Hamatum ◽  
Study Results ◽  
Vascular Wilt Disease

Abstract Trichoderma hamatum (Bonord.) Bainier was evaluated for its antagonistic potential against Fusarium oxysporum Schlecht. emend. Snyder and Hansen sp. lentis, the causal agent of vascular wilt disease of lentil (Lens culinaris Medikus). Hyphal interactions on Petri plates resulted in an increase in the number of conidial spores and an increase in the vegetative growth of T. hamatum, and a decrease in the hyphal formation and sporulation of F. oxysporum f. sp. lentis. Electron and light microscopical observations suggested that hyphae of T. hamatum established aggressive contact and attachment with the hyphae of the pathogen. Growing in parallel, coiled densely and tightly, T. hamatum may penetrate those of the pathogen hyphae causing collapse due to the loss of turgor pressure. The cellulolytic enzymes produced by T. hamatum presented sufficient characteristics for its antifungal activity in the hyphae hydrolysis and competition process. In growth room and glasshouse experiments, the addition of the conidial suspension of T. hamatum or its culture filtrate to soil, significantly (p ≤ 0.05) reduced development and spore germination of F. oxysporum. In the rhizosphere, T. hamatum occupied the same ecological niches (rhizosphere, roots, and stems) parasitizing F. oxysporum f. sp. lentis. Treatments using T. hamatum delayed the time of infection by F. oxysporum, promoted the growth, and increased the dry weight of a susceptible variety of lentil (cv. Precoz). The percent of mortality was reduced to 33 and 40% when using T. hamatum and its filtrate, respectively, compared to 93% in the control treatment during the 65 days of growing in loam/sand (2:1 vol/vol) under glasshouse conditions. Plant colonization results indicate that T. hamatum and its filtrate significantly (p ≤ 0.05) reduced development of the pathogen in the vascular tissue of lentil to < 30 and < 40% stem colonization, respectively, compared to 100% in the plant pathogen control. Our results suggest that potential biocontrol mechanisms of T. hamatum towards F. oxysporum f. sp. lentis were antibiosis by production of antifungal enzymes, complex mechanisms of mycoparasitism, competition for key nutrients and/or ecological niches, growth promotion, and a combination of these effects. This study results hold important suggestions for further development of effective strategies of the biological control of Fusarium vascular wilt of lentil.

scholarly journals First Report of Fusarium equiseti Causing Vascular Wilt Disease on Vitis vinifera in Spain

Plant Disease ◽  
2019 ◽  
Vol 103 (9) ◽  
pp. 2471
Author(s):  
S. Astudillo-Calderón ◽  
M. L. Tello ◽  
J. M. Alonso de Robador ◽  
B. Pintos ◽  
A. Gómez-Garay
Keyword(s):  
Vitis Vinifera ◽  
Wilt Disease ◽  
Vascular Wilt ◽  
Fusarium Equiseti ◽  
First Report ◽  
Vascular Wilt Disease
Sign in / Sign up

Export Citation Format

Share Document