New Fungi Associated with Blackberry Root Rot (Rubus spp.), in Michoacán, Mexico
Published on: 15th April, 2024
Los Reyes, Michoacán, Mexico, is one of the main blackberry-producing places in the world, however, the disease located at the root level has caused important economic losses. Currently has been reported that the fungus Fusarium spp., is the main causal agent but actions to control it have failed. The objective of this work was to identify the possible presence of unreported pathogenic fungi in the root system of the blackberry and identify them molecularly. It was sampled in a commercial open-air orchard from Los Reyes, pieces of roots were taken from symptomatic plants with wilting and decay. The fungi were isolated in the laboratory, identified with taxonomic keys, extraction was performed, and the sequences obtained were compared with those reported in the NCBI gene bank. Among the results obtained were Kalmusia italica, Epicoccum nigrum, Microsphaeropsis arundinis, Achizophyllum commune, and, as expected, some species of Fusarium spp.
Effects of Vochysia haenkeana extract on the neuromuscular blockade induced by Bothrops jararaca venom on chick biventer cervicis preparation in vitro
Published on: 8th August, 2017
OCLC Number/Unique Identifier: 7286423140
Vochysia haenkeana extract (Vh-E) was assessed against the neuromuscular blockade induced by Bothrops jararaca venom on chick biventer cervicis (BC) preparation. Pre- and post-venom incubation treatments (Pre-vit and Post-vit) were analysed here. Contractures ACh (110 µM) and KCl (20 mM) were evoked before and after addition of venom without stimulation. Vh-E (600 µg/mL) under Pre-vit was more efficient to neutralize the neuromuscular blockade by venom (40 µg/mL) [72.5±4.6% (venom) vs. 45.2±14% (Vh-E) of blockade, p<0.05, n=4]. Vh-E (600 µg/mL) did not cause significant changes under Post-vit [72.5±4.6% (venom) vs. 63.4±8.2% (Vh-E) of blockade, n=4]. The Pre-vit inhibited the blockade of the contracture to ACh (106±17% of response; n=4) while the Post-vit was able to attenuate the effect of the venom on this contracture (55±5% of response; n=4); related to those contractures to KCl both of treatments with Vh-E attenuated the blocker effect of the venom (62.5±7.7% and 55±5% of response for Pre-vit and Post-vit, respectively; n=4). In conclusion, Vh-E neutralizes partially the neuromuscular blockade in Pre-vit, an effect that can be related to preserved function of “extrinsic” post-synaptic receptors, by measured contractures in response to ACh. The myotoxicity of the venom was significantly reduced by Vh-E in both, Pre-vit and Post-vit, by measured contractures in response to KCl.
HBV: Genomic Structure, HBVsAg Isolation and innovative Virotherapy Initiation in the Middle East
Published on: 9th August, 2017
OCLC Number/Unique Identifier: 7286354687
Hepatitis B virus (HBV) is one of the world’s major infectious diseases with 350 million people who are chronic carriers of HBV [1]. Significant minorities go on to develop liver cirrhosis or hepatocellular carcinoma and over 1 million die annually from HBV-diseased liver. Janahi E. at faculty of science, Bahrain University, Bahrain has submitted the following information [2], on HBV-genome organization as part of his Ph.D. degree (2007) in Imperial College, England. HBV genomic organization has 4 Open Reading Frames (ORFs) i.e. Pre-S/S Gene, Pre-C/C ORF, P ORF and X ORF. Regulatory Elements has 4 promoters (pre S2, pre S1, C promoters and X promoters), Pregenomic RNA, Enhancers (Enh 1 and Enh 2) where they are involved in cccDNA formation, Glococorticoid-Responsive Element which is located in X ORF and P ORF overlapping, Polyadenylation Signal (Direct Repeat 1 (DR1) and Direct Repeat 2 (DR2)), Epsilon-Stem Loop and Post-Transcriptional Regulatory Element. HBV genotype D is prevalent in our Middle East area. The HBV genome is a partially relaxed-circular dsDNA molecule consisting of a full length strand (minus strand) with a single unique nick and a complementary (positive strand) of variable length. HBV is considered as a para-retrovirus because its replication involves the reverse transcription of an intermediate-RNA function, of pre-genomic RNA (pgRNA). Replication of HBV genome starts with the encapsidation of the pgRNA and encodes HBV polymerase into an immature nucleocapsid formed by the viral core antigen.
Physiological impact of Zinc nanoparticle on germination of rice (Oryza sativa L) seed
Published on: 29th August, 2017
OCLC Number/Unique Identifier: 7286344217
Nanoparticles affects growth and development of Plant. Zinc is an important micronutrient that regulates various physiological responses in plant. Application of nanoparticles for modulating plants physiological response is a recent practice. Zinc nanoparticles has been widely used in industry for several decades. However, no significant work had been made on its potential use in agriculture. Understanding physiological effect of Zn NP on rice seed germination could suggest the basis for its prospective application in agriculture to improve plant growth. In the present experiment effect of Zn NP was studied in Kmj-6-1-1 which is a commonly growing rice cultivar of Karimganj district of Assam, India. An exposure to Zn NP (0 mg/L, 5mg/L,10mg/L, 15mg/L, 20mg/L & 50mg/L) caused significant changes in radicle and plumule length , mass ( fresh & dry mass) and seed moisture content in rice. Antioxidant enzymes like guaiacol peroxidase (GPx), catalase (CAT), superoxide dismutase (SOD) and gluthathione reductase (GR) also increased due to ZnNP treatment. This suggest that Zn NP may significantly alters antioxidant metabolism during rice seed germination. In conclusion, Zn NP protected rice plants from ROS damage by improving levels of antioxidant enzyme activities during germination. As a consequence the Zn NP treated seeds, showed better potential for germination. Further, genomic analysis of germinating rice seeds are needed to elucidate the molecular mechanisms by which Zn NP modulates germination process in rice.
Effects of Site Factors on the Clonal Growth of Phyllostachys bambusoides f. shouzhu Yi
Published on: 25th September, 2017
OCLC Number/Unique Identifier: 7286355301
In order to provide theoretical foundation for forestation of Phyllostachys bambusoides f. shouzhu Yi, the site factors, and the morphological character and biomass of standard bamboo were investigated in 16 sample spots of bamboo forest in Liangping county, Chongqing City, and then the effects of site factors on the clonal growth was discussed. Three site factors as the slope position, altitude, species diversity, had significant effects on the clonal growth of the bamboo. The effects of the gradient, slope aspect, humus thickness, and soil thickness were little, but that of slope aspects was not significant. The altitude of above 800 m, the upper slope, the steep slope and slope, and the thin soil were not suitable for its clonal growth. The results showed that (1) the main site factors affecting the growth of P. bambusoides f. shouzhu were slope position, soil thickness and humus thickness; (2) The forestation site of P. bambusoides f. shouzhu should be selected at the flat ground and the gentle slope of the hills below altitude of 800 m, and the slope position of the forestation site should be selected at the mid and lower position of a hill; (3) Soil thickness and humus thickness should be kept at a suitable level; (4) The diversity of plant species in the bamboo forest should be kept at a suitable level for keeping its growth environment.
Role of polyamine metabolism in plant pathogen interactions
Published on: 7th December, 2017
OCLC Number/Unique Identifier: 7286426514
Polyamines are aliphatic amines found in all living cells, and they are necessary for several fundamental cell processes. Their protective role against various abiotic stress factors has been reported in different plant species, while the mechanism by which polyamines act during plant-microbe interaction is still poorly understood. The several types of the interactions between the plants and the microbes outline a divers and complex picture of the action mechanisms. The present review focuses on this aspect of the mode of action of polyamines and polyamine metabolism during biotroph and necrotroph interactions between plants and pathogens. It seems that apoplastic metabolism of polyamines of the host and the accumulation of H2O2 as a result of polyamine catabolism play important signalling role in plant-pathogen interactions. The manipulation of the members of the polyamine-induced signalling pathways could increase the host plant resistance to biotic stresses.
Oscillation of neutrino in a vacuum with mixing flavor
Published on: 4th August, 2022
We developed multiple equations to observe the two and three flavors of neutrino oscillation with the mixing angle based on L/E=0.1 to 0.9 in this study. In different settings, the nature of the neutrino oscillation probability was discovered to be varied in different equations. The observation indicates increasing likelihood in one equation and decreasing probability in the other equations in two flavor oscillation neutrinos. To characterize the probability of neutrino oscillation, we use four distinct angles: 50, 100, 150, and 200. The probability of neutrino oscillation was determined to be highest at an angle of 150 degrees. However, with increasing mixing angles, the likelihood of oscillation increases on the basis of created equation (25) and decreases on the basis of equations (26) and (27) in the three-flavor neutrino oscillation. From generated equations (25) and (26) the maximum neutrino oscillation of probability is discovered at an angle of 150, however, from equation (27), the maximum probability is observed at 50. The greatest neutrino oscillation is found to be 0.9999 and the minimum is zero in all of these two and three flavors of oscillation.
Bleeding from Varices: Still a Heavy Burden in Patients with Cirrhosis
Published on: 27th December, 2023
Introduction: Bleeding from varices is a severe complication in patients with cirrhosis. Despite its treatment has been well established in the last three decades the mortality can be still high. This study compares the epidemiological features and the bleeding-related outcomes of a group of patients published about ten years ago with a more recent group of 168 consecutive patients. Methods: The diagnosis, the treatment, and the main outcomes (5-day failure, 5-day and 6-week rebleeding, 5-day and 6-week mortality) of variceal bleeding were evaluated according to the current guidelines.Results: The number of patients with cirrhosis admitted for variceal bleeding every year has progressively decreased in the last ten years. The age sex and severity of liver disease, evaluated with Child Pugh and MELD scores, were comparable in the two series. In the more recent series, there were significantly fewer patients with HCV infection and more patients with alcohol-related cirrhosis. The main outcomes of bleeding were comparable too. Overall, at 6 weeks 36.4% of patients did not overcome the bleeding episode. Conclusion: The decreasing incidence of bleeding from varices is likely attributable to antiviral treatment of HCV and HBV and the larger diffusion of beta-blockers in primary prophylaxis. Despite the larger application of the gold standard therapy, the mortality of variceal bleeding remains high in patients with cirrhosis.
Bio Avengers: How do Endophytic Microorganisms Alter a Plant's Defense Mechanisms?
Published on: 20th February, 2024
Endophytic microbes i.e. bacteria, fungi, and actinomycetes live inside the plant tissues without causing any harmful effect on them. Recently, research has been conducted on endophytic microbes to enhance agriculture and environmental sustainability. Endophytes stabilize a close association with their host, which leads to major changes in plant physiology. Endophytic microbes and pathogens use the same strategies for entering the host cell. This condition may create competition between the endophytes and the pathogen. Therefore, host plants develop strategies to allow the entry of specific microorganisms. Additionally, endophytic microorganisms may temper their own genetic structure to survive and avoid the host defence machinery. The plant-endophyte symbionts promote direct and indirect defences to host plants. This plays an essential role in modulating plant defences against various stresses, particularly biotic stress. In this minireview, we highlight the interaction of endophytic microbes with their host. As well as the role of endophytic microbes in the enhancement of plant defence systems.
“Thyroid”: Letter to the Editor, Radioactive Iodine: A Living History
Published on: 7th March, 2024
The history of the origin of the medical uses of Radioiodine (RAI) has been compromised by false narratives as recently as June 2023 in the “Thyroid “article “Radioactive Iodine: A Living History”. Primary sources document Dr. Saul Hertz (1905 - 1950) as solely conceiving of the medical uses of RAI, being the first and foremost to develop the experimental data, bringing RAI from bench to bedside, and extending the use of radionuclides to diagnose and/or treat cancer and other conditions. Dr Hertz predicted and worked toward conquering cancer with other radionuclides. Saul Hertz overcame the racism of his time, a world war interrupting his first clinical study, a strong pushback from the surgeons, and unethical medical publishing practices. Today, Nuclear Medicine, Radiopharmacy, Medical Physics, and other specialties are collaborating and actively building on Saul Hertz’s enduring foundational work.
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