Biotechnology Journal International
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Effects of Cadmium Stress on Photosynthetic Physiological Characteristics of Two Rorippa Species
No full textThe photosynthetic physiological characteristics of Rorippa amphilia and Rorippa sylvestris were studied by pot experiment under Cd stress, and 7 Cd treatments were 0, 1, 5, 10, 50, 100, 200（mg·kg-1）respectively. The results showed that, (1) The Chla, chlb, and Ch(la+b) changed little when the Cd concentration in the soil was less than 100 mg·kg-1. There was no significant difference among the treatments. When Cd concentration was more than or equal to 100 mg·kg-1, all indexes decreased significantly, Chla/b increased gradually with the increase of Cd stressful concentration; (2) Net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) first increased and then decreased with the increase of Cd stressful concentration, while intercellular carbon dioxide concentration (Ci) increased significantly; (3) The photochemical quenching coefficient (qP) and electron transfer rate (ETR) decreased gradually with the increase of Cd stressful concentration, while the non-photochemical quenching coefficient (NPQ) increased with the increase of Cd stress concentration. It indicated that the photosynthetic mechanism of leaves was damaged; the maximum photochemical quantum yield (Fv/Fm) and potential activity (Fv/Fo) of PSII decreased gradually with the increase of Cd stress concentration. When Cd concentration was more than 50 mg·kg-1, the decrease was very obvious, showing photoinhibition. The concentration of Cd below 50 mg·kg-1 had little effect on photosynthesis. These results provide a theoretical application by using these two species of Rorippa to ecological restore the Cd contaminated farmland and abandoned mines
RT-PCR Mediated Identification of SARS-CoV-2 Patients from Particular Regions of Bangladesh and the Multi-factorial Analysis Considering Their Pre and Post Infection Health Conditions
No full textBackground: SARS-CoV-2 is a type of coronavirus shows bizarre features with fatality rates at 34.4%. The clinical and non-clinical features of COVID-19 might be causative factors for more rapid community spreading compared to MERS and SARS-CoV-1.
Objectives: To study the efficacy of RT-PCR based detection of SARS-CoV-2 patients. Besides, the patients\u27 pre and post-infection health conditions depending on selective clinical and nonclinical parameters were analyzed.
Materials and Methods: Clinical and non- clinical data were collected from 205 randomly selected COVID-19 patients, identified through RT-PCR from different areas of Bangladesh. The data were analyzed using statistical and analytical tools to illustrate the impact of the pandemic situation on the sufferers.
Results: Molecular identification of the patients through RT-PCR has been observed as the most efficient option for detecting SARS-CoV-2 patients. Patients with the smoking habit have been reported to be more prone to the COVID-19 infection; surprisingly the non-smoker female was the worse suffers. The patients aged 60-69 years were the worst sufferers with every adverse health conditions mentioned. Professionally, 28% self-employed male and 8.19% female were infected. The most infected individuals were house wife (32.029%), as next to the health care workers (22.1%). With the increased age group, a decreased number of smokers were found. Nebulization of 5% home and 12% hospital treated patients were provided, with Oxygen for 26% of hospitalized patients. After recovery, combined physical and psychological complications were observed in 19% of male and 11% female. The socioeconomic, environmental and geographical annotations exposed a clear relationship with the rate of infection as revealed from the nonclinical data analysis.
Conclusion: RT-PCR proved its specialty in COVID-19 detection. In addition, impacts of different clinical and nonclinical factors on the physical conditions of the nCoV patients were found significant in the research
Microbial Metabolites Powered by Nanoparticles could be Used as Pesticides in Future? (NanoBioPecdicides)
No full textAims: Pests are one of the factors that cause problems in plant production. Many methods are used in the fight against economically damaging insects. Mixtures of various substances are used to reduce the negative effects of harmful organisms and to control them. These substances, called pesticides, often have a chemical origin, because they have many direct and indirect damages to human and nature. In the future, thanks to the encapsulation of microbial metabolites into nanoparticles, it is likely that nano-biopesticides based on new nanobiotechnological methods will emerge as alternatives to conventional pesticides.
Opinion: Could the bacterial origin chitinase enzyme (Nano-Bio formulation) immobilize to zinc oxide nanoparticles be used against harmful insects in agricultural production in the future? Can it be used to break down the chitin structure in the intestinal cells of harmful insects, suppress intestinal enzymes that are important to insects (LDH, AT, AP) and cause death by breaking down the throat?
Call to the Future: New pesticide formulations can be created as a renewable natural product against plant pests using various protein structures that humans produce from microorganisms isolated from their gene sources. The stabilization of the product can be maintained by immobilizing the nanoparticles to increase the effectiveness of the pest. Thus, the risk potential of pollution created by traditional pesticides will be reduced. The use of Nano-bio pesticides will bring a different perspective in the field of industry. By establishing various production centres based on bioprocesses of renewable resources, it can lead to an effective struggle in agricultural production and increase global employment on a global scale.
What do we have to do?: As scientists, believing in the power of microorganisms, the investigation of the potential of microbial metabolites to be used as pesticides and their effectiveness and stability with nanoparticles is important for the 10-year process ahead
Comparative Physiological, Biochemical and Transcript Response to Drought in Sorghum Genotypes
No full textSorghum [Sorghum bicolor (L.) Moench] is considered as an important staple crop in the tropical regions. However, the productivity of this useful crop is hindered by drought which contributes to significant yield reduction. The present study aimed to decipher the effects of drought stress on physiological, biochemical and gene expression changes in sorghum genotypes and to ascertain the differences in their response to drought stress. To achieve these objectives, six sorghum genotypes were grown in pot culture in a greenhouse, in a randomized complete block design and exposed to water stress treatment for 10 days. From the study, drought stress caused a significant (P < .05) reduction in plant height, leaf water and chlorophyll contents while the proline, malondialdehyde (MDA), soluble sugar, electrolyte leakage (EL), hydrogen peroxide (H2O2) and antioxidant enzymes activity increased significantly (P < .05) and differentially in all sorghum genotypes. Among the genotypes investigated, PI 585456 showed enhanced performance and was considered as the most tolerant to drought in relation to plant growth and water relation, membrane status, photosynthetic activity, ROS and osmolytes accumulation and antioxidant enzymes activity. Furthermore, the transcript expression analyses of different categories of drought-responsive genes, viz; antioxidant-related, osmolytes biosynthesis-related, dehydrin-related, photosystem-related and transcription-related were differentially upregulated in sorghum genotypes investigated. The results revealed the differences in metabolic response to drought among the genotypes, which accentuated the physiological, biochemical and molecular mechanism related to a specific response that may play a vital role in drought tolerance in sorghum
Nano-Bio Challenge: New Approaches in Agricultural Production
No full textDespite climate change scenarios, new research on improving yield and quality in agricultural production is extremely important. The use of nanomaterials and plant-growth-promoting bacteria (PGPB) has been of interest to researchers in recent years. In the future, the creation of new nano-biotechnological products by using nanomaterials together with bacteria will be more advantageous than conventional methods. Thus, the number of fertilizers applied on farmland will be reduced and maximum efficiency will be achieved with minimum input. The number of chemical inputs applied to agricultural areas will be reduced and effective protection against various plant stress factors will be provided. By producing Nano-bio-active. It is expected to increase mineral availability in farmland according to chemical formulations. The results obtained are certain to provide an effective benefit to the agricultural area and nature. Also, nano-biotechnological methods with new research potential are important for serving scientific researchers
Selection and Validation of Reference Genes for Quantitative Real-Time PCR Expression Analysis of Candidate Genes in Carposina sasakii (Lepidoptera: Carposinidae)
No full textCarposina sasakii is one of the most important pests on the quality of stone and pome fruits. Investigation of a gene expression level in the species is hampered because of the gap of validated reference genes. The expression variation in the transcription levels of eight candidate reference genes, Actin (ACT), Tubulinbeta-1 (TUB), Ribosomal protein 49 (RP49), Elongation factor1-alpha (EF-1a), Elongation factor1-b (EF-1b), Elongation factor1-d (EF-1d), Ribosomal proteinL13 (RPL13) and Glyceraldehyde-3-phosphate dehydrogenase (GAPDH), were analyzed by quantitative real-time PCR (qPCR). The stability and ranking of these gene expression profiles in three organ types (head, thorax and abdomen), three developmental stages (larva, pupa and moth), and five diapause states (non-diapause, pre-diapause, diapause 0 d, diapause 20 d and diapause 60 d) were assessed using two algorithm-based methods, geNorm and NormFinder. EF-1a, ACT and GAPDH were evaluated to be the three stable reference genes based on the important observations and comprehensive analysis, whereas TUB and EF-1b showed low expression stability. Best gene combinations for different qPCR analysis in C. sasakii could be chosen from the three stable reference genes, the using of two reference genes is sufficient to effectively normalize qPCR data in C. sasakii. The study laid the foundation for gene expression analysis in C. sasakii and provided new information for the selection of reference genes
Structural Characterization of Novel Luciferase from Bioluminescence Fungi Verticillium longisporum
No full textLuciferase is an enzyme that catalyses a reaction to produce a visible light using an oxidative process, a chemical reaction that is typically referred to as bioluminescent. Insects, bacterial origin or microorganism of marine nature were considered as the mainly sources of discovered luciferase. The protein was commercialized for biomedical and biotechnological use as reporter gene. The first discovered wild form of luciferase originally from Photinu spyralis (firefly). Hence, there is need for both exploration and examination of novel luciferase to be expanded to new sources such as fungal which may likely be exploited to serve commercial purposes and applications. In this study, a novel uncharacterized luciferase protein from a fungal species Verticillium longisporum, was modelled and analysed using bioinformatic tools. The modelled 3D structure is of high quality with a PROCHECK score of 99.5%, ERRAT2 value of 91.01%, and Verify3D score of91.01%, showing that the conformational structure is acceptable. The result showed that the fungal luciferase enzyme share major characteristics with luciferase representative from various fungal and bacterial species. There is only a slight difference in the two nucleotide bindings in V. longisporum with a D/E substitution of D with E and S/T substitution. The difference of the two nucleotides binding from the two proteins may be related to the evolutionary trends. Other differences include increased number of hydrophobic and polar amino acid groups than aromatic and aliphatic ones, as well as more coils and loops with less strands. The distance between the ligand and the binding site that houses Asp 64 and Thr 110 from template proteins (Riboflavin lyaseRcaE) and Asp 543 and Thr 589 from model luciferase is similar. The only difference occurred in the V. longisporum; protein oxidoreductase activities acts on paired donors, incorporate or reduce molecular oxygen, while in the template protein oxidoreductase activities act on single donors with incorporation of molecular oxygen. This study on fungal sourced luciferase present a unique opportunity away from the more well established bacterial and insect based luciferase
Preparation of Synthetic Seeds of Citrus jambhiri Using in vitro Regenerated Multiple Plantlets
No full textBiotechnological tools are useful for true-to-type propagation. Shoot tips encapsulation is potential for plant development from pre-existing meristematic tissue. MS medium fortified with 1 and 2 mg/L of BAP (6-bezylaminopurine) was found to be suitable for in vitro mass-multiplication of plantlets (10.18 and 13.05 plantlets/explant, respectively) of Citrus jambhiri from nodal segments. Nodal segments were more appropriate than the shoot tips for in vitro multiplication of plantlets. Synthetic seeds were prepared using 2.5% sodium alginate dropping into 3.0% CaCl2 solution. Maximum germination was recorded when beaded shoot tips were cultured on MS medium fortified with 1 and 2 mg/L of BAP (96.67 and 100.00%, respectively). However, the germination of synthetic seeds was found to be comparatively high than the earlier findings. The results support the use of encapsulated unipolar explants for synthetic seed preparation. These type of capsules could be useful in exchange of sterile material between laboratories, germplasm conservation and direct plant propagation
Genotoxicity Assessment of Potassium Bromate by Means of DNA Image Analysis on the Root Tip Nuclei of Allium sativum L.
No full textAllium sativum assay was widely used to assess the compound\u27s cytotoxicity and genotoxicity on plants and animals. Only few studies analyzed the genotoxic effect of potassium bromated (KBrO3) on the DNA content of plant cells. DNA content assay is an efficient test for the measure of chromosomal DNA damages. Based on this approach the effect of KBrO3 on DNA content change was investigated in root tip nuclei of A. sativum. Different concentrations of food additives KBrO3. 3 g/l, 5 g/l 7 g/l and 9 g/l % were prepared and treatments were given. A. sativum root were incubated for 2, 6 and 24 hours and DNA image analysis of root tip nuclei was performed. The analysis was based on the measurement of the Mean Optical Density (MOD) which represents the cellular DNA content. The results showed that the KBrO3 significantly decreased of DNA content compared to the control at all concentrations and treatment periods in dose-dependent manner. The present study suggests that extensive use of food additives should be banned due to genotoxic effect on living cells. Therefore, there is an urgent need to evaluate potential mutagenic effects of KBrO3 on human
Coffee: Constituents and Health Benefits
No full textSince ancient times, coffee has been one of the widely consumed beverages all over the world. It is renowned for its refreshing, body stimulating effect and unique taste. It belongs to the genus Coffea, class Dicotyledoneae, order Rubiales and family Rubiaceae. Coffee is a natural complex chemical mixture constituted of several compounds. It is accountable for numerous bioactivities and a number of compounds exhibit these effects. Some of the significant bioactivities documented are anti-oxidant, anti-mutagenic, anti-carcinogenic and anti-obesity properties. The varying constituents of coffee responsible for the chemo-protective effects are mainly polyphenols including chlorogenic acids and their degradation products. Others include caffeine, diterpenoid alcohols such as kahweol, cafestol and other phenolics. Coffee has been reported to exhibit both protective and adverse effects on various body systems such as skeletal (bone), reproductive, nervous and cardiovascular systems; homocysteine and cholesterol levels and so on. The present review provides an overview of the coffee and its constituents; and their relationship with various diseases. Recent investigations on its health benefits, with focus on their anti-cancer, anti-obesity properties and effect on cardiovascular diseases have also been discussed