scholarly journals Diminished Pathogen and Enhanced Endophyte Colonization upon CoInoculation of Endophytic and Pathogenic Fusarium Strains

2020 ◽  
Vol 8 (4) ◽  
pp. 544 ◽  
Author(s):  
Maria E. Constantin ◽  
Babette V. Vlieger ◽  
Frank L. W. Takken ◽  
Martijn Rep
Keyword(s):  
Fusarium Wilt ◽  
Root Colonization ◽  
Wilt Disease ◽  
Fungal Colonization ◽  
Plant Defences ◽  
Crop Species ◽  
Disease Symptoms ◽  
Tomato Species ◽  
Tomato Roots ◽  
Pathogen Colonization

Root colonization by Fusarium oxysporum (Fo) endophytes reduces wilt disease symptoms caused by pathogenic Fo strains. The endophytic strain Fo47, isolated from wilt suppressive soils, reduces Fusarium wilt in various crop species such as tomato, flax, and asparagus. How endophyte-mediated resistance (EMR) against Fusarium wilt is achieved is unclear. Here, nonpathogenic colonization by Fo47 and pathogenic colonization by Fo f.sp. lycopersici (Fol) strains were assessed in tomato roots and stems when inoculated separately or coinoculated. It is shown that Fo47 reduces Fol colonization in stems of both noncultivated and cultivated tomato species. Conversely, Fo47 colonization of coinoculated tomato stems was increased compared to single inoculated plants. Quantitative PCR of fungal colonization of roots (co)inoculated with Fo47 and/or Fol showed that pathogen colonization was drastically reduced when coinoculated with Fo47, compared with single inoculated roots. Endophytic colonization of tomato roots remained unchanged upon coinoculation with Fol. In conclusion, EMR against Fusarium wilt is correlated with a reduction of root and stem colonization by the pathogen. In addition, the endophyte may take advantage of the pathogen-induced suppression of plant defences as it colonizes tomato stems more extensively.

Effect of genotype and root colonization in biological control of fusarium wilts in pigeonpea and chickpea byPseudomonas aeruginosaPNA1

2003 ◽  
Vol 49 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Vanamala Anjaiah ◽  
Pierre Cornelis ◽  
Nico Koedam
Keyword(s):  
Fusarium Wilt ◽  
Root Colonization ◽  
Wilt Disease ◽  
Disease Suppression ◽  
Tn5 Mutants ◽  
Phenazine Production ◽  
Phenazine Antibiotics ◽  
Fusarium Wilts

Pseudomonas aeruginosa PNA1, an isolate from chickpea rhizosphere in India, protected pigeonpea and chickpea plants from fusarium wilt disease, which is caused by Fusarium oxysporum f.sp. ciceris and Fusarium udum. Inoculation with strain PNA1 significantly reduced the incidence of fusarium wilt in pigeonpea and chickpea on both susceptible and moderately tolerant genotypes. However, strain PNA1 protected the plants from fusarium wilt until maturity only in moderately tolerant genotypes of pigeonpea and chickpea. Root colonization of pigeonpea and chickpea, which was measured using a lacZ-marked strain of PNA1, showed tenfold lower root colonization of susceptible genotypes than that of moderately tolerant genotypes, indicating that this plant–bacteria interaction could be important for disease suppression in this plant. Strain PNA1 produced two phenazine antibiotics, phenazine-1-carboxylic acid and oxychlororaphin, in vitro. Its Tn5 mutants (FM29 and FM13), which were deficient in phenazine production, caused a reduction or loss of wilt disease suppression in vivo. Hence, phenazine production by PNA1 also contributed to the biocontrol of fusarium wilt diseases in pigeonpea and chickpea.Key words: biocontrol, fusarium wilts, phenazines, Pseudomonas.

Biological Management of Fusarium Wilt in Chickpea (Cicer Arietinum L.) Caused by Fusarium oxysporum f. sp. ciceris

2019 ◽  
Author(s):  
P Murali Sankar ◽  
S Vanitha ◽  
A Kamalakannan ◽  
P Anantha Raju ◽  
P Jeyakumar
Keyword(s):  
Fusarium Wilt ◽  
Root Colonization ◽  
Wilt Disease ◽  
Field Conditions ◽  
Pseudomonas Chlororaphis ◽  
Cicer Arietinum L ◽  
Yield Parameters ◽  
Colonization Ability ◽  
Growth Promoting ◽  
Biological Management

In the present study, the three rhizobacterial strains (CPs3, CBs5 and Pf1) and fungal antagonists (CTs2 and Tv1) were evaluated against Fusarium wilt of chickpea under glasshouse and field conditions. Among all the treatments the strain CPs3 (Pseudomonas chlororaphis) has recorded highest germination (100%) and yield parameters viz., yield of 1194.4 kg/ ha with 13 (Number of pod bearing branches/plant), 32.3 (Pods/plant) and 33.0 g of 100 seeds weight with lowest incidence of wilt at 14.3% with disease reduction 80.7% (glasshouse) and 21.67% with 70.18% in the field conditions when compared to other biocontrol agents. The highest population of 8.2 x105 cfu/ g of soil and followed by Pf1 (Pseudomonas fluorescens) recorded 7.5 x105 cfu/g of soil. The strain CPs3 (Pseudomonas chlororaphis) had better growth promoting traits and management of the wilt disease in chickpea with superior root colonization ability.

Reaction and growth of cucumber hybrids grafted on hybrid squash in response to infection with Fusarium wilt disease

2017 ◽  
Vol 35 (1) ◽  
pp. 027-035
Author(s):  
Alaa Ibrahim ◽  
◽  
Omar Hmmoudi ◽  
George Asmar ◽  
Naser Sheikh Suleiman ◽  
...  
Keyword(s):  
Fusarium Wilt ◽  
Wilt Disease ◽  
Fusarium Wilt Disease

Biocontrol of tomato Fusarium wilt disease by a new Moringa endophytic Aspergillus isolates

2021 ◽  
Author(s):  
Ahmed M. Aldinary ◽  
Amer Morsy Abdelaziz ◽  
Ayman A. Farrag ◽  
Mohamed S. Attia
Keyword(s):  
Fusarium Wilt ◽  
Wilt Disease ◽  
Fusarium Wilt Disease

scholarly journals Palmitic acid mediated change of rhizosphere and alleviation of Fusarium wilt disease in watermelon

2021 ◽  
Author(s):  
Kexin Ma ◽  
Jinming Kou ◽  
Muhammad Khashi U Rahman ◽  
Wenting Du ◽  
Xingyu Liang ◽  
...  
Keyword(s):  
Palmitic Acid ◽  
Fusarium Wilt ◽  
Wilt Disease ◽  
Fusarium Wilt Disease

scholarly journals Considerations for Verticillium Wilt Resistance Evaluation in Potato

Plant Disease ◽  
2007 ◽  
Vol 91 (4) ◽  
pp. 360-367 ◽  
Author(s):  
K. E. Frost ◽  
D. I. Rouse ◽  
S. H. Jansky
Keyword(s):  
Disease Severity ◽  
Verticillium Wilt ◽  
Yield Loss ◽  
Control Culture ◽  
In Planta ◽  
Disease Symptoms ◽  
Accuracy And Precision ◽  
Population Sizes ◽  
Pathogen Colonization ◽  
Time Accuracy

Verticillium wilt (Vw), caused by the soilborne fungi Verticillium dahliae and V. albo-atrum, is an important disease of potato (Solanum tuberosum). Host plant resistance is a promising method of Vw control. Culture-based methods that quantify the pathogen in host tissue often are used for Vw resistance screening. To evaluate the processing time, accuracy, and precision of these methods, 46 clones were planted in a field naturally infested with V. dahliae to collect data on visual disease symptoms, pathogen colonization, and yield. In 2002, disease severity explained 4.34% of the variability of yield loss, but the linear relationship between stem colonization and yield loss was not significant. In 2003, stem colonization explained 57.5% of the variability of yield loss, whereas disease severity explained 1.7% of the variability of yield loss. Correlations comparing clone ranks from repeated pathogen measurements indicated that culturing sap from individual stems or bulked stems generated more repeatable clone rankings than culturing dried stems. Clone rankings were more repeatable between years if pathogen measurements were made earlier in the growing season. The results indicate a need to characterize the effect of the environment on the relationship among pathogen population sizes in planta, disease symptoms, and yield loss.

scholarly journals The tomato xylem sap protein XSP10 is required for full susceptibility to Fusarium wilt disease

2010 ◽  
Vol 62 (3) ◽  
pp. 963-973 ◽  
Author(s):  
Vladimir Krasikov ◽  
Henk L. Dekker ◽  
Martijn Rep ◽  
Frank L.W. Takken
Keyword(s):  
Fusarium Wilt ◽  
Xylem Sap ◽  
Wilt Disease ◽  
Fusarium Wilt Disease

Biocontrol of Fusarium wilt disease in tomato by Paenibacillus ehimensis KWN38

2014 ◽  
Vol 31 (1) ◽  
pp. 165-174 ◽  
Author(s):  
Kyaw Wai Naing ◽  
Xuan Hoa Nguyen ◽  
Muhammad Anees ◽  
Yong Seong Lee ◽  
Yong Cheol Kim ◽  
...  
Keyword(s):  
Fusarium Wilt ◽  
Wilt Disease ◽  
Fusarium Wilt Disease ◽  
Paenibacillus Ehimensis
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