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Ali H. Bahkali

Bio: Ali H. Bahkali is an academic researcher from King Saud University. The author has contributed to research in topics: Dothideomycetes & Pleosporales. The author has an hindex of 50, co-authored 287 publications receiving 9411 citations. Previous affiliations of Ali H. Bahkali include Yeungnam University & Landcare Research.


Papers
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Journal ArticleDOI
TL;DR: Four Stachybotrys strains were isolated from soil in China and one was identified as a novel species by morphological characters of phialides and conidia, and correlation between morphological and molecular-based clustering demonstrated that the studied isolate was a new species.
Abstract: Four Stachybotrys strains were isolated from soil in China. One was identified as a novel species by morphological characters of phialides and conidia. It produced cylindrical conidia with irregular striations and smooth, hyaline conidiophores. Phylogenetic analysis of three DNA markers, the internal transcribed spacer region of rDNA (ITS1–5.8S–ITS2), the translation elongation factor 1 alpha (tef1) and RNA polymerase II subunit (rpb2), supported the morphological results. The correlation between morphological and molecular-based clustering demonstrated that the studied isolate was a new species. Two other isolates were identified as S. cf. elegans.

9 citations

Journal ArticleDOI
TL;DR: Tristratiperidium microsporum clusters with the hyphomycete Subramaniomyces fusisaprophyticus in the order Xylariales, in the clade comprising Apiosporaceae, Hyponectriaceae, Melogrammataceae, and Pseudomassariaceae.
Abstract: Tristratiperidium microsporum gen. et sp. nov. (Xylariales) is introduced to accommodate a taxon isolated from dead leaves of Arundo plinii, collected in Italy. The sexual and asexual morphs are described and illustrated and compared with similar taxa. Phylogenetic analysis of combined Internal Transcribed Spacer (ITS) and Large Subunit (LSU) rRNA sequence data show the relationships of T. microsporum with other genera in the Xylariales. Tristratiperidium microsporum clusters with the hyphomycete Subramaniomyces fusisaprophyticus in the order Xylariales, in the clade comprising Apiosporaceae, Hyponectriaceae, Melogrammataceae, and Pseudomassariaceae. The phylogenetic relationships of T. microsporum and allied fungi are discussed and its placement in the Xylariales genera incertae sedis is suggested.

9 citations

Journal ArticleDOI
TL;DR: In this article, a novel heterostructured CuS/Ag2MoO4 nanocomposite (NCs) was prepared via sono-chemical precipitation method and characterized by UV-vis diffuse reflectance spectroscopy, XPS, SEM, HR-TEM, FT-IR, PL, Raman, EIS, ESR, N2 adsorption and desorption, EDAX and ESR.

9 citations

Journal ArticleDOI
TL;DR: Combined phylogenetic analysis of ITS, GAPDH, CHS, ACT and TUB2 sequence data demonstrate that C. sonchicola is a distinct species within the dematium species complex.
Abstract: Colletotrichum sonchicola , sp. nov . from Sonchus sp. (dandelion tribe) in Forli-Cesena Province, Italy, is introduced using morphological and molecular data. Combined phylogenetic analysis of ITS, GAPDH, CHS, ACT and TUB2 sequence data demonstrate that C. sonchicola is a distinct species within the dematium species complex. The new species is illustrated and compared with related taxa. This provides the first record of a Colletotrichum species from the genus Sonchus .

9 citations

Journal ArticleDOI
TL;DR: Fumonisin was produced by all of the studied Fusarium isolates, except F. oxysporum, at a concentration of over 1 μg/mL, indicating non-agreement between morphological and molecular identification of the isolates.
Abstract: Infesting Fusarium species isolated from banana fruit samples were identified and quantified by morphological, mycotoxicological and molecular tools. A total of 19 Fusarium isolates were obtained: F. semitectum was most predominant (26%), followed by F. proliferatum (16%), F. circinatum (16%), F. chlamydosporum (10.5%), F. solani (10.5%), F. oxysporum (10.5%) and F. thapsinum (5%). Fumonisin B1, deoxynivalenol and zearalenone contents were assayed by high-performance liquid chromatography (HPLC). Seventeen isolates, belonging to F. chlamydosporum, F. circinatum, F. semitectum, F. solani, F. thapsinum, F. proliferatum and Fusarium spp., produced mycotoxins when cultured on rice medium. Fumonisin was produced by all of the studied Fusarium isolates, except F. oxysporum, at a concentration of over 1 μg/mL. F. citrinium isolates 4 and 5 and F. solani isolate 3 were the most potent producers of deoxynivalenol. We compared the 19 Fusarium isolates based on the bands amplified by 10 microsatellite primers. Of these, seven primers, (TCC)5, (TGG)5, (GTA)5, (ATG)5, (TAC)5, (TGC)5 and (TGT)5, yielded a high number of bands and different mean number of alleles. The similarity level between isolates was calculated using a simple matching coefficient. Dendrograms were constructed by the unweighted pair-group method with arithmetical averages (UPGMA). Two main clusters were observed. The interspecific genetic similarity between Fusarium spp. isolates was between 40% and 58% and the intraspecific similarity from 58% to 100%, indicating a high degree of genetic diversity in the tested isolates. Some unexpected genetic similarities were observed among the isolates, indicating non-agreement between morphological and molecular identification of the isolates.

9 citations


Cited by
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Journal Article
Fumio Tajima1
30 Oct 1989-Genomics
TL;DR: It is suggested that the natural selection against large insertion/deletion is so weak that a large amount of variation is maintained in a population.

11,521 citations

Journal ArticleDOI

7,335 citations

01 Jan 1944
TL;DR: The only previously known species of Myrsidea from bulbuls, M. warwicki ex Ixos philippinus, is redescribed and sixteen new species are described; they and their type hosts are described.
Abstract: We redescribe the only previously known species of Myrsidea from bulbuls, M. pycnonoti Eichler. Sixteen new species are described; they and their type hosts are: M. phillipsi ex Pycnonotus goiavier goiavier (Scopoli), M. gieferi ex P. goiavier suluensis Mearns, M. kulpai ex P. flavescens Blyth, M. finlaysoni ex P. finlaysoni Strickland, M. kathleenae ex P. cafer (L.), M. warwicki ex Ixos philippinus (J. R. Forster), M. mcclurei ex Microscelis amaurotis (Temminck), M. zeylanici ex P. zeylanicus (Gmelin), M. plumosi ex P. plumosus Blyth, M. eutiloti ex P. eutilotus (Jardine and Selby), M. adamsae ex P. urostictus (Salvadori), M. ochracei ex Criniger ochraceus F. Moore, M. borbonici ex Hypsipetes borbonicus (J. R. Forster), M. johnsoni ex P. atriceps (Temminck), M. palmai ex C. ochraceus, and M. claytoni ex P. eutilotus. A key is provided for the identification of these 17 species.

1,756 citations

01 Feb 1995
TL;DR: In this paper, the unpolarized absorption and circular dichroism spectra of the fundamental vibrational transitions of the chiral molecule, 4-methyl-2-oxetanone, are calculated ab initio using DFT, MP2, and SCF methodologies and a 5S4P2D/3S2P (TZ2P) basis set.
Abstract: : The unpolarized absorption and circular dichroism spectra of the fundamental vibrational transitions of the chiral molecule, 4-methyl-2-oxetanone, are calculated ab initio. Harmonic force fields are obtained using Density Functional Theory (DFT), MP2, and SCF methodologies and a 5S4P2D/3S2P (TZ2P) basis set. DFT calculations use the Local Spin Density Approximation (LSDA), BLYP, and Becke3LYP (B3LYP) density functionals. Mid-IR spectra predicted using LSDA, BLYP, and B3LYP force fields are of significantly different quality, the B3LYP force field yielding spectra in clearly superior, and overall excellent, agreement with experiment. The MP2 force field yields spectra in slightly worse agreement with experiment than the B3LYP force field. The SCF force field yields spectra in poor agreement with experiment.The basis set dependence of B3LYP force fields is also explored: the 6-31G* and TZ2P basis sets give very similar results while the 3-21G basis set yields spectra in substantially worse agreements with experiment. jg

1,652 citations

Journal ArticleDOI
TL;DR: The results of a collaborative integrated work which aims to characterize the trichothecene genotypes of strains from three Fusarium species, collected over the period 2000–2013 and to enhance the standardization of epidemiological data collection were described.
Abstract: Fusarium species, particularly Fusarium graminearum and F. culmorum, are the main cause of trichothecene type B contamination in cereals. Data on the distribution of Fusarium trichothecene genotypes in cereals in Europe are scattered in time and space. Furthermore, a common core set of related variables (sampling method, host cultivar, previous crop, etc.) that would allow more effective analysis of factors influencing the spatial and temporal population distribution, is lacking. Consequently, based on the available data, it is difficult to identify factors influencing chemotype distribution and spread at the European level. Here we describe the results of a collaborative integrated work which aims (1) to characterize the trichothecene genotypes of strains from three Fusarium species, collected over the period 2000–2013 and (2) to enhance the standardization of epidemiological data collection. Information on host plant, country of origin, sampling location, year of sampling and previous crop of 1147 F. graminearum, 479 F. culmorum, and 3 F. cortaderiae strains obtained from 17 European countries was compiled and a map of trichothecene type B genotype distribution was plotted for each species. All information on the strains was collected in a freely accessible and updatable database (www.catalogueeu.luxmcc.lu), which will serve as a starting point for epidemiological analysis of potential spatial and temporal trichothecene genotype shifts in Europe. The analysis of the currently available European dataset showed that in F. graminearum, the predominant genotype was 15-acetyldeoxynivalenol (15-ADON) (82.9%), followed by 3-acetyldeoxynivalenol (3-ADON) (13.6%), and nivalenol (NIV) (3.5%). In F. culmorum, the prevalent genotype was 3-ADON (59.9%), while the NIV genotype accounted for the remaining 40.1%. Both, geographical and temporal patterns of trichothecene genotypes distribution were identified.

936 citations