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Showing 11 results for Ghaderi

Fariba Ghaderi,
Volume 1, Issue 2 (9-2012)

Root and crown rot is an important disease in Kohgiluyeh and Boyerahmad province peach orchards. Its signs are wilting, general weakness, loss of foliage and sometimes sudden wilt and death of the tree. To isolate the pathogen, used corn meal-agar with antibiotics, Delvasid, Ampicillin and rifampicin medium. Pathogen is Phytophthora cactorum. For pathogenesis test, 2 inoculation methods, to a tree branch or contaminated soil around the roots and crown of seedling is used. Inoculation roots and crowns of seedlings and saplings of six varieties of peaches with this pathogen, showed that Takheh is resistant, Alberta, Redhoon and Mashhad red peach are semi-resistant, Angiri and J.H.Hill are sensitive to the disease
Mohammad Abbasi Domshahri, Reza Ghaderi,
Volume 8, Issue 1 (3-2019)

Abbasi Domshahri M. and Ghaderi R. 2019. Causal agents of citrus trees decline in Fars province . Plant Pathology Science 8(1):15-23. DOI: 10.2982/PPS.8.1.15.
 During recent years, citrus trees decline has becoming one of the most important factors of limiting the area of citrus orchards in the south of Iran including Fars province. Different biotic and abiotic agents were attributed to citrus decline worldwide, but it appears that some abiotic stresses including soil drought, and soil or water salinity, as well as some infectious diseases including gummosis, dieback, citrus nematode and witch’s broom are more important in Fars province. This is an attempt to gather information of the potential agents of complex diseases known as “citrus trees decline”, as well as, discussion on management strategies of citrus decline in Fars province.

Fariba Ghaderi,
Volume 8, Issue 2 (9-2019)

Ghaderi F (2019) Incidence of root and crown rot disease of black cumin in the southwest of Iran. Plant Pathology Science 8(2):1-8. DOI: 10.2982/PPS.8.2.1
 Introduction: Black cumin, an annual flowering plant in the family Ranunculaceae, is a medicinal herb with many pharmacological properties. Crown and root rot disease of this plant has been reported in most countries worldwide. This study was conducted to investigate the occurrence of this disease and identifying the causal agent in southwest of Iran. Materials and Methods: Black cumin farms were visited in Kohgiluyeh and Boyer-Ahmad province and southwest of Iran. Plants with crown and root rot were sampled. Pieces of infected root and crown were washed with tap water, dry blotted and plated on CMA-PARP. In total, 17 isolates of two different fungus-like species were isolated from rotted root and crown. Species identification was done based on morphological characteristics and temperature requirement. Pathogenicity test of the isolates were done on 3-week-old seedlings of Baft cultivar under greenhouse condition. Results: Eleven isolates were identified as Pythium aphanidermatum and six isolates as Phytophthora drechsleri. Both of these fungus-like species were pathogenic on the tested black cumin variety. Conclusion: Crown and root rot disease is present in the farms of black cumin in the southwest of Iran. The causal agents of this disease were identified as Pythium aphanidermatum and Phytophthora drechsleri. The black cumin cultivar Baft is susceptible to these pathogens.

Samaneh Ahmadi, Fariba Ghaderi, Dariush Safaei,
Volume 9, Issue 1 (3-2020)

Ahmadi S, Ghaderi F, Safaee D (2020) Oak charcoal rot disease in Iran. Plant Pathology Science 9(1):118-128.         DOI: 10.2982/PPS.9.1.118.

Oak charcoal rot is caused by two fungi, Biscogniauxia mediterranea and Obolarina persica. These fungi, which are opportunistic or secondary invaders and attack stressful trees, are one of the main problems of oak forests in Iran. The disease was first reported in 2011 in the northern forests on Quercus castaneifolia and Zelkova carpinifolia trees and then in the Zagros forests on Q. brantii tree. The disease has spread rapidly in the forests of the Zagros over the years. Symptoms of the disease include decay and death of trees, browning of leaves and early fall. Gum secretion on the branches and trunks of old trees and browning of wood texture and woody vessels can be seen up and down the height of the trunk. The morphological characteristics of pathogens, the spread and survival of pathogens, and disease management methods are described in this article.

Ali Asghar Dehghan, Reza Ghaderi,
Volume 9, Issue 1 (3-2020)

Dehghan AA, Ghaderi R (2020) Application of seaweeds in plant diseases management. Plant Pathology Science 9(1):101-107.         DOI: 10.2982/PPS.9.1.101.
Algae are the most important plant growth stimulants due to their high content of minerals, amino acids, vitamins and growth regulators such as auxin, cytokinin and gibberellin. Use of these stimuli in crops can improve rooting, yield, photosynthetic capacity and their resistance to pathogens. Application of algae (mainly seaweeds) against various plant diseases including bacterial, fungal, viral and nematode diseases as well as pests has been proven. Seaweeds are used as a powder or extract mixed with soil, or foliar spray to control of plant diseases. They are usually involved in controlling plant pathogens by inducing plant resistance, antagonistic activity by induced activity of other microorganisms, and enhancing plant growth. In general, seaweeds can be applied as biofertilizers, biostimulators and soil amendments in integrated plant diseases management programs.

Farnaz Fekrat, Reza Ghaderi,
Volume 9, Issue 2 ((Spring and Summer) 2020)

Fekrat F, Ghaderi R (2020) Assessment of the structure of the nematode community as an index for soil health. Plant Pathology Science 9(2):129-136. DOI: 10.2982/PPS.9.2.129.
By studying the structure of the nematode community, healthy and unhealthy soils can be identified in terms of biodiversity and nutrient network. This information is useful for managing soil nutrient networks. The study of the nematode population structure as a biological indicator of soil health is based on the assessment of biodiversity indices, nutrition groups, population dynamics, soil nutrient network profile, biomass and metabolic profile. Practical applications for studying the structure of nematode populations in agricultural and natural ecosystems are described.

Fariba Ghaderi,
Volume 9, Issue 2 ((Spring and Summer) 2020)

Ghaderi F (2020) Glume blotch disease of wheat. Plant Pathology Science 9(2):108-118.         DOI: 10.2982/PPS.9.2.108.
Glume blotch caused by the fungus Parastagonospora nodorum is an important disease of bread and durum wheat. The disease reduces the quantity and quality of wheat product. Disease history, pathogen morphology, and disease management methods, including crop rotation, plowing, post-harvest collection of plant debris , weed control, healthy seed culture or seed disinfection with a systemic fungicide, and cultivation of resistant cultivars are described.

Bahram Sharifnabi, Reza Raghebi, Fariba Ghaderi,
Volume 10, Issue 1 ((Autumn & Winter) 2021)

Sharifnabi B, Raghebi R, Ghaderi F (2021) Smuts of poaceous plants in Markazi and Lorestan Provinces of Iran. Plant Pathology Science 10(1):42-63.   Doi: 10.2982/PPS.10.1.42.

Introduction: Poaceous plants such as corn, wheat, barley, sorghum, oats and millet are an important part of agricultural ecosystems. Smuts are one of the most important fungal diseases of these plants, which often cause economic damage and the destruction of part or all of their yields. Materials and Methods: Poaceous smut infected plants in farms and pastures of Markazi and Lorestan provinces were sampled. Morphological characteristics of these fungi and their germination type of teliospores were studied with bright field and fluorescent microscopes and identified using valid keys. The phylogenetic relationship of these fungi with other smuts was also investigated based on ITS-rDNA region sequencing. Results: According to the type of host, morphological characteristics and mode of teliospores germination 12 species vs. U. maydis, U. hordei, U. turcomanica, U. avenae, U.nuda, U. bromivora, U. cynodontis, U. tritici, Tilletia laevis, Tilletia controversa Sporisorium reilianum and S. cruentum were diagnosed. The morphological characteristics and phylogenetic relationship of these fungi with other smuts are described. Conclusion: The smuts of poaceous plants in Markazi and Lorestan provinces include eight species of the genus Ustilago, two species of the genus Sporisorium and two species of the genus Tilletia.

Fariba Ghaderi, Seyed Ali Asghar Hashemi,
Volume 11, Issue 2 ((Spring and Summer) 2022)

Ghaderi F, Hasehemi SAA (2022) Phytophthora citricola as the causal agent of persimmon root rot in Fars province of Iran. Plant Pathology Science 11(2): 1-10.  
Introduction: Phytophthora species are a serious threat to plant products worldwide. Therefore, identifying them is the first step in finding a way to treat the disease. The aim of this study was to identify Phytophthora species causing root and crown rot of persimmon trees in Fars province. Materials and methods: Samples were taken from the crowns and roots of diseased persimmon trees, in the summer of 2018-2019. Infected root and crown tissues were cultured in CMA-PARPH medium. Isolates of Phytophthora species were purified by single spore method and morphological and molecular characteristics were used to identify them. Results: Six isolates were obtained from the roots of diseased persimmon trees and identified as Phytophthora citricola based on their morphological characteristics. Phylogenetic studies based on beta-tubulin (βtub) and 28S rDNA genes showed that all isolates (Iran-Pc1 to Iran-Pc6) were grouped into clade 2 with a validation scale of 100 and confirmed the identification of P .citricola. Conclusion: This is a new report of persimmon root and crown rot caused by Phytophthora citricola in Fars Province.
Keywords: Beta-tubulin, Gene, Persimmon, Phytophthora, 28S rDNA

Azadeh Habibi, Fariba Ghaderi, Ziaeddin Banihashemi,
Volume 12, Issue 1 ((Autumn & Winter) 2023)

Habibi A, Ghaderi F,  Banihashemi Z (2023) Coevolution of Polystigma amygdalinum through a process of host tracking. Plant Pathology Science 12(1):36-45.
     Introduction: The almond tree (Prunus dulcis) and its wild relative, the mountain almond tree (Amygdalus scoparia), grew up together in the province of Fars in Iran over decades. Red leaf blotch disease caused by Polystigma amygdalinum is one of the most important almond diseases in the world. This research was conducted with the aim of investigating the evolution of this pathogen on its wild and domestic hosts. Materials and Methods: Ascospores suspension of P. amygdalinum isolates obtained from almond in Fars province was inoculated to almond and mountain almond seedlings in a greenhouse. The progress of the disease in the diseased leaves of mountain almond compared to almond was investigated by sectioning with a freezing microtome from the spots created on the leaves. Results: Red leaf blotch spots appeared on the leaves of both types of almonds. Statistical analysis of test data showed that P. amygdalinum isolates from almond are able to cause disease in mountain almond with significantly lower severity, and longer incubation period. Conclusion: The results of this research show that P. amygdalinum, the cause of red leaf blotch disease, have coevolved on cultivated almond through a process of host tracking.


Fariba Ghaderi, Hojatollah Mohammadi,
Volume 12, Issue 2 ((Spring and Summer) 2023)

Ghaderi F, Mohammadi H (2023) Occurrence of jujube brown spot disease in Iran. Plant Pathology Science 12(2):95-104. 
Jujube tree has a natural distribution in tropical and sub-tropical regions of Asia. Symptoms of brown-to-black spots on leaves, and fruits, and twigs blight were observed in the hills of the suburbs of Nurabad County, Fars Province, Iran, in 2022. This research was conducted to identify the cause of this disease based on morphological and genetic characteristics. The diseased leaves and branches of the neighboring trees in this area were sampled. The pathogen was isolated and purified after surface disinfection of disease tissues on potato/dextrose/agar medium. Its morphological characteristics were studied and the fungus Nothophoma quercina was identified. Phylogenetic analysis base on the comparison of beta-tubulin (tub2), and ITS-rDNA genes sequences, with related fungi in NCBI Gen Bank, confirmed the of N. quercina species. Its pathogenicity was proved on the side cut jujube branches based on Koch's postulates in vitro. This is the first report of brown spot and twigs blight of the jujube trees caused by N. quercina in Iran.

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