Identifying phytopathogenic fungi in Al-Baha province, Saudi Arabia through their molecular and morphological features: An overview

Almiman, Bandar F.

doi:10.1016/j.sjbs.2023.103572

Cited by 4 publications

References 42 publications

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Effects of temperature and water activity on 25 de novo strains of pathogenic plant fungi in Al-Baha and Baljurashi cities in Saudi Arabia

Almiman

2023

J.Umm Al-Qura Univ. Appll. Sci.

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Fungi inflict a great deal of damage to crops in fields and in storage facilities, causing issues such as leaf spot, wilt, rust, dieback and rot, as well as releasing mycotoxins that taint vegetation. In the current study, 25 de novo fungal isolates were taken from infected plant tissue (leaf, root and fruit), at pre- and post-harvest stages. Isolates were identified using molecular markers; 8 genera and 15 species were determined. The most common species was Penicillium spp. (40%), Aspergillus spp. (20%), Fusarium spp. (16%) and Alternaria alternata species (8%). The remaining 16% was comprised of various types of fungi, including Geotrichum candidum, Neofusicoccum parvum, Rhizopus stolonifera and Mucor fragilis. Many of these genera are known to cause significant crop damage and are notorious mycotoxin producers. An evaluation of the optimal growth temperature revealed the ideal temperatures were 30 °C for 56% of isolates, 25 °C for 28% of isolates and 20 °C for 16% of isolates. An assessment of water activity showed that 60% of isolates belonged to Penicillium and Aspergillus spp. and were mesophilic and xerophilic. Another 28% of isolates were Fusarium spp., Geotrichum candidum, Neofusicoccum parvum and Mucor fragilis, and hydrophilic. The remaining 12%, representing Alternaria alternata and Rhizopus stolonifera, were mesophilic. The current study provides accurate eco-physiological response data and molecular information for each isolate. The findings can assist the development of novel approaches to control the expansion of invasive fungal infections and minimise their deleterious consequences.

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Effects of temperature and water activity on 25 de novo strains of pathogenic plant fungi in Al-Baha and Baljurashi cities in Saudi Arabia

Almiman

2023

J.Umm Al-Qura Univ. Appll. Sci.

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Identifying the optimal temperature and water activity conditions of phytopathogenic fungi recovered from Al-Baha province

Almiman

2024

J.Umm Al-Qura Univ. Appll. Sci.

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Fungi are responsible for many plant infections. Indeed, fungi are responsible for most plant spoilage that occurs in the field or in storage, causing symptoms of dieback, leaf spot, rot, rust and wilt. A more serious issue is that fungi produce mycotoxins, which can contaminate crops. Samples of leaf, fruit and root tissues were collected from sick crops, pre- and post-harvest within Al-Baha region. Using molecular markers, twenty fungal isolates were identified that represent eight genera and thirteen species. The most common species were Penicillium spp. (45%), followed by Aspergillus spp. (25%). The remaining 30% were comprised of multiple species (Alternaria alternata, Fusarium oxysporum, Geotrichum candidum, Lasiodiplodia theobromae, Megasporoporia minor and Rhizopus arrhizu). The majority of these isolates are recognised as spoilers of crops and producers of mycotoxins. The study evaluated which temperatures optimised fungal growth. Half of the isolates thrived best at 25 °C; six isolates favoured 30 °C, whilst four isolates grew best at 20 °C. The study also evaluated the optimal water activity (aw) for fungal growth, at four points (0.995, 0.99, 0.90 and 0.85 aw). The isolates were categorised as being either xerophilic, mesophilic or hydrophilic. The majority of isolates (70%) were xerophilic (Aspergillus and Penicillium spp.), 10% were mesophilic (Alternaria alternata and Rhizopus oryzae spp.) and 20% were hydrophilic (Lasiodiplodia theobromae, Geotrichum candidum, Megasporoporia minor and Fusarium oxysporum spp). The information derived from this study will assist in building effective strategies to control these pathogens, minimising crops losses and mycotoxin contamination.

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Molecular prevalence of vector borne bacterial pathogens in the blood samples of wild rodent species trapped from Saudi Arabia

Ghafar,

Alghamdi,

Alanazi

et al. 2024

Comparative Immunology, Microbiology and Infectious Diseases

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Identifying phytopathogenic fungi in Al-Baha province, Saudi Arabia through their molecular and morphological features: An overview

Cited by 4 publications

References 42 publications

Effects of temperature and water activity on 25 de novo strains of pathogenic plant fungi in Al-Baha and Baljurashi cities in Saudi Arabia

Effects of temperature and water activity on 25 de novo strains of pathogenic plant fungi in Al-Baha and Baljurashi cities in Saudi Arabia

Identifying the optimal temperature and water activity conditions of phytopathogenic fungi recovered from Al-Baha province

Molecular prevalence of vector borne bacterial pathogens in the blood samples of wild rodent species trapped from Saudi Arabia

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