Population Structure and Development of Resistance to Hymexazol Among <i>Fusarium solani</i> Populations from Date Palm, Citrus and Cucumber

Al-Sadi, Abdullah M.; Al-Masoodi, Ruqaya S.; Al-Ismaili, Majid; Al-Mahmooli, Issa Hashil

doi:10.1111/jph.12397

Cited by 32 publications

(18 citation statements)

References 18 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Limited studies in the past addressed fungal infections and endophytes in the roots of acid limes ( C. aurantifolia ). Lasiodiplodia species, Neoscytalidium dimidiatum and Fusarium species were common on acid lime roots 12 , 21 , 29 . A study by Michel-Rosales and Valdés 19 and Reddy, et al .…”

Section: Discussionmentioning

confidence: 99%

Illumina-MiSeq analysis of fungi in acid lime roots reveals dominance of Fusarium and variation in fungal taxa

Al-Sadi

Kazerooni

2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

A study was conducted to analyze fungal diversity in the roots of acid lime (Citrus aurantifolia) collected from Oman, a semi-arid country located in the South Eastern part of the Arabian Peninsula. MiSeq analysis showed the Ascomycota and Sordariomycetes were the most abundant phylum and class in acid lime roots, respectively. Glomeromycota, Basidiomycota and Microsporidia were the other fungal phyla, while Glomeromycetes and some other classes belonging to Ascomycota and Basidiomycota were detected at lower frequencies. The genus Fusarium was the most abundant in all samples, making up 46 to 95% of the total reads. Some fungal genera of Arbuscular mycorrhizae and nematophagous fungi were detected in some of the acid lime roots. Analysis of the level of fungal diversity showed that no significant differences exist among groups of root samples (from different locations) in their Chao richness and Shannon diversity levels (P < 0.05). Principle component analysis of fungal communities significantly separated samples according to their locations. This is the first study to evaluate fungal diversity in acid lime roots using high throughput sequencing analysis. The study reveals the presence of various fungal taxa in the roots, dominated by Fusarium species and including some mycorrhizae and nematophagous fungi.

show abstract

Section: Discussionmentioning

confidence: 99%

Illumina-MiSeq analysis of fungi in acid lime roots reveals dominance of Fusarium and variation in fungal taxa

Al-Sadi

Kazerooni

2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The lower level of fungal diversity in the rhizosphere of cucumber could be related to the use of fungicides in this crop. Cucumbers are heavily affected by wilt and other root diseases, which necessitate frequent applications of mefenoxam, thiophanate-methyl, hymexazol and other fungicides ( Al-Sadi, 2012 ; Al-Sadi et al, 2012 , 2015a ). It is therefore likely that fungicide applications could have resulted in lowering fungal populations in the rhizosphere of cucumbers.…”

Section: Discussionmentioning

confidence: 99%

454-Pyrosequencing Reveals Variable Fungal Diversity Across Farming Systems

Kazeeroni

Al-Sadi

2016

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

Oasis farming system is common in some parts of the world, especially in the Arabian Peninsula and several African countries. In Oman, the farming system in the majority of farms follows a semi-oasis farming (SOF) system, which is characterized by growing multiple crops mainly for home consumption, but also for local market. This study was conducted to investigate fungal diversity using pyrosequencing approach in soils from a farm utilizing a SOF system which is cultivated with date palms, acid limes and cucumbers. Fungal diversity from this farm was compared to that from an organic farm (OR) growing cucumbers and tomatoes. Fungal diversity was found to be variable among different crops in the same farm. The observed OTUs, Chao1 richness estimates and Shannon diversity values indicated that soils from date palms and acid limes have higher fungal diversity compared to soil from cucumbers (SOF). In addition, they also indicated that the level of fungal diversity is higher in the rhizosphere of cucumbers grown in OR compared to SOF. Ascomycota was the most dominant phylum in most of the samples from the OR and SOF farms. Other dominant phyla are Microsporidia, Chytridiomycota, and Basidiomycota. The differential level of fungal diversity within the SOF could be related to the variation in the cultural practices employed for each crop.

show abstract

“…Chemical control of Pythium damping-off is practiced through the use of Mefenoxam, Hymexazol, Propamocarb, and other fungicides (Papavizas et al, 1978; Al-Sa’di et al, 2008, Al-Sadi et al, 2015a). Growers usually use solarization in summer to reduce Pythium propagules in soil (Deadman et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Aspergillus terreus Inhibits Growth and Induces Morphological Abnormalities in Pythium aphanidermatum and Suppresses Pythium-Induced Damping-Off of Cucumber

2018

Self Cite

View full text Add to dashboard Cite

The study investigated the efficacy of two isolates of Aspergillus terreus (65P and 9F) on the growth, morphology and pathogenicity of Pythium aphanidermatum on cucumber. In vitro tests showed that the two isolates inhibited the growth of P. aphanidermatum in culture. Investigating P. aphanidermatum hyphae close to the inhibition zone showed that the hyphae showed abnormal growth and loss of internal content. Treating P. aphanidermatum with the culture filtrate (CF) of A. terreus resulted in significant rise in cellular leakage of P. aphanidermatum mycelium. Testing glucanase enzyme activity by both A. terreus isolates showed a significant increase in glucanase activity. This suggests that the cell walls of Pythium, which consist of glucan, are affected by the glucanase enzyme produced by A. terreus. In addition, Aspergillus isolates produced siderephore, which is suggested to be involved in inhibition of Pythium growth. Also, the CFs of 65P and 9F isolates significantly reduced spore production by P. aphanidermatum compared to the control (P < 0.05). In bioassay tests, the two isolates of A. terreus increased the survival rate of cucumber seedlings from 10 to 20% in the control seedlings treated with P. aphanidermatum to 38–39% when the biocontrol agents were used. No disease symptoms were observed on cucumber seedlings only treated with the isolates 65P and 9F of A. terreus. In addition, the A. terreus isolates did not have any negative effects on the growth of cucumber seedlings. This study shows that isolates of A. terreus can help suppress Pythium-induced damping-off of cucumber, which is suggested to be through the effect of A. terreus and its glucanase enzyme on P. aphanidermatum mycelium.

show abstract

Population Structure and Development of Resistance to Hymexazol Among Fusarium solani Populations from Date Palm, Citrus and Cucumber

Cited by 32 publications

References 18 publications

Illumina-MiSeq analysis of fungi in acid lime roots reveals dominance of Fusarium and variation in fungal taxa

Illumina-MiSeq analysis of fungi in acid lime roots reveals dominance of Fusarium and variation in fungal taxa

454-Pyrosequencing Reveals Variable Fungal Diversity Across Farming Systems

Aspergillus terreus Inhibits Growth and Induces Morphological Abnormalities in Pythium aphanidermatum and Suppresses Pythium-Induced Damping-Off of Cucumber

Contact Info

Product

Resources

About