Nitika Gupta, Rakesh Kumar, Gopi Kishan, Susheel Kumar Sharma, Nishant Srivastava, Ashwini Kumar, Virendra Kumar Baranwal
Citrus is an economically important fruit crop, belongs to family Rutaceae, cultivated commercially in over 130 countries, which holds a leading profitable position in the international market. The most important citrus varieties are mandarins, oranges, lemons, sweet limes, grapefruits and pomelos. Citrus yellow vein clearing virus (CYVCV) is an important graft transmissible plant pathogen known to reduce productivity of citrus fruits due to its predominant association and widespread occurrence. Requirement of fast, reliable, efficient & economical CYVCV indexing assay is a prerequisite for production of healthy planting material...
February 22, 2024: Current Microbiology
Kadriye Inan Bektas, Aleyna Nalcaoglu, Halil İbrahim Guler, Sabriye Canakci, Ali Osman Belduz
In this study, our aim was to elucidate the relationship between Anoxybacillus rupiensis DSM 17127T and Anoxybacillus geothermalis GSsed3T through whole-genome phylogenetic analysis. The obtained 16S rRNA gene sequence from the genome of A. rupiensis DSM 17127T exhibited a 99.8% similarity with A. geothermalis GSsed3T . In the phylogenetic trees constructed using whole-genome sequences and 16S rRNA gene sequences, A. rupiensis DSM 17127T and A. geothermalis GSsed3T were observed to form a clade, indicating a close relationship between them...
February 20, 2024: Current Microbiology
Songül Yaşar Yildiz
In recent years, there has been a surge in research on extremophiles due to their remarkable ability to survive in harsh environments. Extremophile thermophilic bacteria provide thermostable enzymes for biotechnology and industry. Thermophilic bacteria live in extreme environments like hot springs at 45-80 °C. This study screens and isolates thermophilic bacteria and thermozymes from the Golan hot springs in Karakocan, Elazig, Turkey. The study also characterizes thermophilic bacteria and their thermozymes to understand their features and applications better...
February 20, 2024: Current Microbiology
Akhtach Sihame, Tabia Zakaria, Mabrouk El Khalil, Belkhou Rajae
Exopolysaccharides (EPS) are natural polymers synthesized by several microorganisms, including lactic acid bacteria (LAB). They are characterized by a great structural diversity, which gives them interesting biological and pharmacological properties. This work investigates the physicochemical and biological characterization of a new exopolysaccharide (EPS) produced by a wild Lacticaseibacillus rhamnosus P14. The functional groups, chemical bonds, and thermal and morphological properties of the purified EPS-P14 were determined using Fourier Transform Infrared, Nuclear Magnetic Resonance, and X-ray diffraction spectroscopies, as well as Thermo-gravimetric analysis, Differential Scanning Calorimetry and Scanning Electron Microscopy...
February 19, 2024: Current Microbiology
Taru Verma, Santhi Sanil Nandini, Varsha Singh, Abinaya Raghavan, Harshita Annappa, Chetana Bhaskarla, Ashim Kumar Dubey, Dipankar Nandi
Uncouplers of oxidative phosphorylation dissipate the proton gradient, causing lower ATP production. Bacteria encounter several non-classical uncouplers in the environment, leading to stress-induced adaptations. Here, we addressed the molecular mechanisms responsible for the effects of uncouplers in Escherichia coli. The expression and functions of genes involved in phenotypic antibiotic resistance were studied using three compounds: two strong uncouplers, i.e., Carbonyl cyanide m-chlorophenyl hydrazone (CCCP) and 2,4-Dinitrophenol (DNP), and one moderate uncoupler, i...
February 19, 2024: Current Microbiology
Linda Abou Chacra, Marion Bonnet, Mégane Heredia, Gabriel Haddad, Nicholas Armstrong, Stéphane Alibar, Florence Bretelle, Florence Fenollar
The strains Marseille-Q7072T (= CSUR Q7072T  = CECT 30604 T ) and Marseille-Q7826T (= CSUR Q7826T  = CECT 30727 T ) were isolated from vaginal samples. As MALDI-TOF mass spectrometry failed to identify them, their genomes were directly sequenced to determine their taxogenomic identities. Both strains are anaerobic without any oxidase and catalase activity. C16:0 is the most abundant fatty acid for both strains. Strain Marseille-Q7072T is non-spore-forming, non-motile, Gram-stain-positive, and coccus-shaped, while strain Marseille-Q7826T is non-spore-forming, motile, Gram-stain-variable, and curved rod-shaped...
February 19, 2024: Current Microbiology
Gustavo Issamu Asai Saikawa, Gustavo Henrique Migliorini Guidone, Sandriele Aparecida Noriler, Guilherme Fonseca Reis, Admilton Gonçalves de Oliveira, Gerson Nakazato, Sergio Paulo Dejato Rocha
This study aimed to assess the activity of AgNPs biosynthesized by Fusarium oxysporum (bio-AgNPs) against multidrug-resistant uropathogenic Proteus mirabilis, and to assess the antibacterial activity of catheters coated with bio-AgNPs. Broth microdilution and time-kill kinetics assays were used to determine the antibacterial activity of bio-AgNPs. Catheters were coated with two (2C) and three (3C) bio-AgNPs layers using polydopamine as crosslinker. Catheters were challenged with urine inoculated with P. mirabilis to assess the anti-incrustation activity...
February 19, 2024: Current Microbiology
Ling Zhu, Yu-Chen Wang, Le-Le Li, Xian-Min Huang, Man Zhu, Xiu Gao, Jian Cai
A novel Gram-stain-positive, oval-shaped, and non-flagellated bacterial strain YIM S02556T was isolated from forest soil in Xiongbi Town, Shizong County, Qujing City, Yunnan Province, southwestern China. The strain exhibited high pairwise 16 S rRNA gene sequence similarity with Psychromicrobium lacuslunae (97.3%) and Psychromicrobium silvestre (96.3%). Strain YIM S02556T exhibited an average nucleotide identity (ANI) of 72.5% with P. lacuslunae IHBB 11,108T and 72.8% ANI with P. silvestre AK 20-18T . The digital DNA-DNA hybridization (dDDH) value between strain YIM S02556T and P...
February 19, 2024: Current Microbiology
Arnab Ghosh, Poonam Kanta, Manisha Ramola, Ritin Mohindra, Kapil Goyal, Roop Kishore, Vikas Suri, P V M Lakshmi, Chanderkanta Chauhan, Manisha Sharma, Partha Rakshit, Kalaiarasan Ponnusamy, Tanzin Dikid, Mini P Singh
The present work was carried out during the emergence of Delta Variant of Concern (VoC) and aimed to study the change in SARS CoV-2 viral load in Covishield vaccinated asymptomatic/mildly symptomatic health-care workers (HCWs) to find out the optimum isolation period. The SARS CoV-2 viral load was carried out in sequential samples of 55 eligible HCWs which included unvaccinated (UnV; n = 11), single-dose vaccinated (SDV, n = 20) and double-dose vaccinated [DDV, n = 24; short-interval (<6 weeks)] subjects...
February 14, 2024: Current Microbiology
Tales Poletto, Yohan Fritsche, Vinícius Spolaor Fantinel, Marlove Fátima Brião Muniz, Ricardo Harakava, Valdir Marcos Stefenon
Pecan (Carya illinoinensis) is one important exotic forest crop cultivated in South America, specifically in Brazil, Uruguay, and Argentina. However, diseases such as anthracnose, favored by high humidity conditions and high summer temperatures, make its cultivation difficult, causing important loss to pecan farmers. This study used morphological and molecular approaches to identify the Colletotrichum species causing anthracnose in pecan plantations in Southern Brazil. The isolates obtained from pecan fruits with anthracnose symptoms were grouped through quantitative morphological characteristics into three distinct morphotypes...
February 10, 2024: Current Microbiology
Mao Xia, Yangbin Wang, Yongquan Xia, Jiawei Zeng
The measles vaccine virus strain (MV-Edm) serves as a potential platform for the development of effective oncolytic vectors. Nevertheless, despite promising pre-clinical data, our comprehension of the factors influencing the efficacy of MV-Edm infection and intratumoral spread, as well as the interactions between oncolytic viruses and specific chemotherapeutics associated with viral infection, remains limited. Therefore, we investigated the potency of Forskolin in enhancing the antitumor effect of oncolytic MV-Edm by promoting the Rab27a-dependent vesicular transport system...
February 9, 2024: Current Microbiology
Yuparat Saimee, Waranya Butdee, Chanita Boonmak, Kannika Duangmal
Duckweed-associated actinobacteria are co-existing microbes that affect duckweed growth and adaptation. In this study, we aimed to report a novel actinobacterium species and explore its ability to enhance duckweed growth. Strain DW7H6T was isolated from duckweed, Lemna aequinoctialis. Phylogenetic analysis based on its 16S rRNA gene sequence revealed that the strain was most closely related to Actinomycetospora straminea IY07-55T (99.0%), Actinomycetospora chibensis TT04-21T (98.9%), Actinomycetospora lutea TT00-04T (98...
February 5, 2024: Current Microbiology
Heung Jin Jeon, N Monford Paul Abishek, Yonho Lee, Jeongok Park, Heon M Lim
We have reported a gal mutant called galE stop0 , wherein the galE stop codon was changed to a sense codon. The experiment results demonstrated that preventing galE translation termination inhibited the production of galE 3' ends. This implies that when the galE translation termination was prevented, the galE 3' ends generation was reduced or impaired. We anticipated that the translation of galE would continue to galT, producing a chimeric protein GalE-GalT. This study verified that the chimeric protein was produced, but unexpectedly, we found that the GalT protein was also synthesized in the mutant, and its amount equaled that in the wild-type...
February 5, 2024: Current Microbiology
Sovan Samanta, Jhimli Banerjee, Aparna Das, Sourav Das, Rubai Ahmed, Swarnali Das, Amitava Pal, Kazi Monjur Ali, Rupanjan Mukhopadhyay, Biplab Giri, Sandeep Kumar Dash
A growing number of re-infections with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in previously immunized individuals has sparked discussions about the potential need for a booster vaccine dosage to counteract declining antibody levels and new strains. The protective immunity produced by vaccinations, and past illnesses relies on immunological memory. CD4 + T cells, CD8 + T cells, B cells, and long-lasting antibody responses are all components of the adaptive immune system that can generate and maintain this immunological memory...
February 5, 2024: Current Microbiology
Ishan Tiwari, Ali Asger Bhojiya, Ram Prasad, Shalini Porwal, Ajit Varma, Devendra Kumar Choudhary
Antimicrobial peptides (AMPs) stand as a promising alternative to conventional pesticides, leveraging a multifaceted approach to combat plant pathogens. This study focuses on identifying and characterizing the AMP produced by Lactiplantibacillus argentoratensis strain IT, demonstrating potent antibacterial activity against various harmful microorganisms. Evaluation of AMPs' antibacterial activity was conducted through an agar well diffusion assay, a reliable method for assessing secondary metabolite antimicrobial efficacy...
February 5, 2024: Current Microbiology
Zengyuan Tian, Xiaomin Wang, Yanyi Li, Yu Xi, Mengting He, Yuqi Guo
Soybean are one of the main oil crops in the world. The study demonstrated that co-inoculation with Trichoderma asperellum (Sordariomycetes, Hypocreomycetidae) and Irpex laceratus (Basidiomycota, Polyporales) isolated from Kosteletzkya virginica can promote the growth of soybean seedlings. The two fungi were found to produce various enzymes, including cellulase, amylase, laccase, protease, and urease. Upon inoculation, T. asperellum mainly colonized within the phloem of the roots in soybean seedlings, while I...
February 5, 2024: Current Microbiology
Maryam Shafipour, Abdolmajid Mohammadzadeh, Ezzat Allah Ghaemi, Pezhman Mahmoodi
Toxin-Antitoxin (TA) systems are some small genetic modules in bacteria that play significant roles in resistance and tolerance development to antibiotics. Whole genome sequencing (WGS) is an effective method to analyze TA systems in pathogenic Mycobacteria. However, this study aimed to use a simple and inexpensive PCR-Sequencing approach to investigate the type II TA system. Using data from the WGS of Mycobacterium tuberculosis (M. tuberculosis) strain H37Rv and Mycobacterium bovis (M. bovis) strain BCG, primers specific to the relJK, mazEF3, and vapBC3 gene families were designed by Primer3 software...
February 5, 2024: Current Microbiology
Li Kang, Jiayi You, Yuanyuan Li, Rui Huang, Shuyan Wu
Salmonella is responsible for the majority of food poisoning outbreaks around the world. Pathogenic Salmonella mostly carries a virulence plasmid that contains the Salmonella plasmid virulence gene (spv), a highly conserved sequence encoding effector proteins that can manipulate host cells. Intestinal epithelial cells are crucial components of the innate immune system, acting as the first barrier of defense against infection. When the barrier is breached, Salmonella encounters the underlying macrophages in lamina propria, triggering inflammation and engaging in combat with immune cells recruited by inflammatory factors...
February 2, 2024: Current Microbiology
Soo-Bin Kim, Kyung Hyun Kim, Jin-Sook Park
A strictly aerobic Gram-negative bacterium, designated 2012CJ34-2T , was isolated from marine sponge to Chuja-do in Jeju-island, Republic of Korea and taxonomically characterized. Cells were catalase- and oxidase-positive, and non-motile rods (without flagella). Growth was observed at 15-42 °C (optimum, 30 °C), pH 6-9 (optimum, pH 7), and in the presence of 0.5-10% (w/v) NaCl (optimum, 2-3%). The major cellular fatty acid and respiratory quinones were identified summed feature 3 (C16:1 ω7c/C16:1 ω6c), and Q-8 and Q-9, respectively...
February 1, 2024: Current Microbiology
Devendra Singh, Shobit Thapa, Jyoti Prakash Singh, Himanshu Mahawar, Anil Kumar Saxena, Sunil Kumar Singh, Hans Raj Mahla, Mahipal Choudhary, Manoj Parihar, Khushwant Babal Choudhary, Hillol Chakdar
Drought is a global phenomenon affecting plant growth and productivity, the severity of which has impacts around the whole world. A number of approaches, such as agronomic, conventional breeding, and genetic engineering, are followed to increase drought resilience; however, they are often time consuming and non-sustainable. Plant growth-promoting microorganisms are used worldwide to mitigate drought stress in crop plants. These microorganisms exhibit multifarious traits, which not only help in improving plant and soil health, but also demonstrate capabilities in ameliorating drought stress...
January 31, 2024: Current Microbiology
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