Detection of Fusarium solani as a Pathogen Causing Root Rot and Wilt Diseases of Young Olive Trees in Morocco

Chliyeh, Mohamed; Msairi, Soukaina; Touhami, Amina Ouazzani; Benkirane, Rachid; Douira, Allal

doi:10.9734/arrb/2017/33744

Cited by 12 publications

(8 citation statements)

References 9 publications

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“…(Verkley et al, 2004), but also one phytopathogen recently described to infect olive trees (Fusarium aff. solani;Chliyeh et al, 2017). Other fungi associated with cv.…”

Section: Discussionmentioning

confidence: 99%

Endophytic fungal community succession in reproductive organs of two olive tree cultivars with contrasting anthracnose susceptibilities

Martins

Cameirão²,

Mina³

et al. 2021

Fungal Ecology

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“…(Verkley et al, 2004), but also one phytopathogen recently described to infect olive trees (Fusarium aff. solani;Chliyeh et al, 2017). Other fungi associated with cv.…”

Section: Discussionmentioning

confidence: 99%

Endophytic fungal community succession in reproductive organs of two olive tree cultivars with contrasting anthracnose susceptibilities

Martins

Cameirão²,

Mina³

et al. 2021

Fungal Ecology

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“…The predominant fungus in this study was F. solani and I. macrodidyma isolated from olive from districts in Qasrok, Sartank and Sharia. F.solani and I. macrodidyma has been isolated as the most common fungal pathogen from roots crown and stem of olive in many field survey from different areas of the world (El-Morsi et al, 2009;Úrbez-Torres et al, 2012;Triki et al, 2014 ;Chliyeh et al, 2017;and Ben Amira et al, 2018) Results of isolation indicates that F.oxysporum, F.solani, R.solani, Macrophomina spp, Cylindrocarpon sp., Acremonium sp and Chaetomium sp. were the most frequently isolated fungi from roots of olive trees which showed typical symptoms of root rot and wilt disease complex collected from different locations in Qasrok, Sharia and Sartank.…”

Section: Isolation Of the Causal Agents Of Olive Root Rotmentioning

confidence: 99%

Pathogenicity of Fusarium Solani And Ilyoncteria Macrodidyma on Olive Seedlings Roots And The Efficacy of Soil Microbial Community against Infection

El‐ddin

Haleem

2021

juod

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A total of six olive fields were inspected randomly in three locations (Sartank, Sharia and Qasrook) at Duhok province. The highest severity (40%) and incidence (83%) of olive tree wilting and dieback were recorded in Sharia while the lowest severity was in Sartank (35%). The predominant fungi in this study were Fusarium solani and Ilyoncteria macrodidyma. The occurrence percentage of isolated fungi varied between locations. F.solani was the most frequent (53.3 %) on Qasrok, while I. macrodidyma was recorded at low frequencies (16.6%). F. solani was isolated by 29.4% and 27.2% in Sharia and Sartank respectively. Disease severity of F. solani in aerial part of olive seedlings during May, July, and September was 22.66%, 40.33% and 67% respectively significant differences, while was 24.67%, 31%, and 45.33by I. macrodidyma % respectively. Pathogenicity after five months showed high root infection by F. solani (100%) incidence and (68.20) severities. The reduction in wet and dry weight of the green part was 25.75% and 36.64% and in roots system was 59.29% and 50.99% respectively. I macrodidyma showed (100 %) disease incidence and (46.70%) severity in root system. The reduction in wet and dry weight of the green part was 18.23%, 18.80%, while in olive root was 34.66%, 29.32% respectively.Trichoderma harzianum rapidly stopped F. solani mycelia growth, and showed (64%) inhibition, while Gliocladium sp inhibited the radial growth of F. solani to (31%) and Aspergillus niger, (22%) inhibition respectively. High in vitro inhibition of I. macrodidyma was observed by T. harzianum (77%). The results of dual culture method revealed that T. harzianum completely overgrew the pathogen I. macrodidyma and was placed in class1 according to Bells scale; whereas Penicillium sp. parasitized the tested pathogen up to two-thirds of the medium and were placed in class 2. The antagonism against F. solani showed the overgrew of T. harzianum up to two thirds of the medium and were placed in class 2, while the pathogen colonized at least two-thirds of the medium and overgrew the Gliocladium sp and Aspergillus niger colonies and were placed in class 4. Penicillium sp. colonized one-half of the medium and was placed in class 3.

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“…Soil-borne pathogens are especially harmful as they infect tree roots, limiting growth and increasing susceptibility to other disease occurrences. As described by Ben Amira et al (2017) and Chliyeh et al (2017), Fusarium oxysporum is known to be responsible for olive root rot, causing premature death of the infected plants and large economic losses. Accordingly, understanding the mechanisms linking tree host resistance to stress from soil-borne pathogens is needed to gain insight into forest ecosystem homeostasis, as well as the relationship between rhizosphere interactions and the establishment of a sustainable forest ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere Microbiome of Forest Trees Determines Their Resistance to Soil-borne Pathogens

Zhu

et al. 2022

Preprint

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Background and aimsThe ability of plants to cope with environmental pressure and the interaction between rhizosphere microorganisms and host trees play an important role in the stability and function of forest ecosystems. Beneficial microbes recruited to the plant rhizosphere and stably association with tree roots can potentially reduce biotic stress, but the biochemical processes involved in coping with pathogen attack are not fully understood. Here, we aimed to investigate the ecology process of rhizosphere microbiota from four broad-leaved and three coniferous tree varieties involving in the suppression of soil-borne fungal pathogens. MethodsWe used separation cultivation and in vitro antagonistic experiments to investigate the inhibitory effects of rhizosphere microbiome on pathogenic fungi. Rhizosphere microbiome was then sequenced using the Illumina MiSeq platform, and root exudates of trees were measured by gas chromatography-mass spectrometry (GC-MS).ResultsRhizosphere microbes from seven tree varieties had strong inhibitory effects on fungal pathogens, nevertheless, there were significant differences in their capacity. The dissimilarities in rhizosphere bacterial communities that were significantly correlated with phylogenetic distance of trees had a greater influence on suppression of pathogens compared with microbial abundance and diversity. Combined analysis of a random forest model and co-occurrence networks, revealed a cooperative relationship between key groups that were positively associated with inhibition of fungal pathogens in the tree rhizosphere. This process was further strengthened by specific metabolites secreted by tree roots. ConclusionsIn general, the rhizosphere microbiota of seven tree species had different inhibitory effects on fungal pathogens, and the cooperative relationship within the rhizosphere microbial community plays an important role in maintaining trees resistance to soil pathogens stress.

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Detection of Fusarium solani as a Pathogen Causing Root Rot and Wilt Diseases of Young Olive Trees in Morocco

Cited by 12 publications

References 9 publications

Endophytic fungal community succession in reproductive organs of two olive tree cultivars with contrasting anthracnose susceptibilities

Endophytic fungal community succession in reproductive organs of two olive tree cultivars with contrasting anthracnose susceptibilities

Pathogenicity of Fusarium Solani And Ilyoncteria Macrodidyma on Olive Seedlings Roots And The Efficacy of Soil Microbial Community against Infection

Rhizosphere Microbiome of Forest Trees Determines Their Resistance to Soil-borne Pathogens

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