Publications by authors named "Paritosh Kumar"

The fishmeal is boon for aquaculture production in this recent pollution and climate change era. However, the demand of fishmeal is enhancing in many folds which needs to find alternative to fishmeal in cheap price. The present investigation addresses these issues with quinoa husk (QH).

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Contaminants are a major cause of seafood export rejections in foreign markets and have significantly impacted consumer health. This investigation addresses the issues of metal contamination and biochemical markers in Litopenaeus vannamei from East Midnapore, West Bengal, India. The analyzed metals included vanadium (V), chromium (Cr), manganese (Mn), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), molybdenum (Mo), silver (Ag), gallium (Ga), germanium (Ge), arsenic (As), selenium (Se), strontium (Sr), tin (Sn), cadmium (Cd), mercury (Hg), and lead (Pb), using Inductively Coupled Plasma Mass Spectrometry (ICP-MS).

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  • The study investigates how iron nanoparticles (Fe-NPs) can improve the thermal tolerance of Pangasianodon hypophthalmus (a type of fish) exposed to high temperatures and toxic substances like arsenic and ammonia.
  • Fe-NPs were synthesized using environmentally friendly methods from fish gills and were added to the fish's diet in varying amounts, with 15 mg/kg showing significant results in improving temperature tolerance.
  • Not only did the 15 mg/kg supplementation lower critical and lethal thermal minimums, but it also raised critical and lethal thermal maximums while enhancing the expression of important stress-related genes, indicating that Fe-NPs successfully help the fish cope with thermal stress.
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The recent trend of global warming poses a significant threat to ecosystems worldwide. This global climate change has also impacted the pollution levels in aquatic ecosystems, subsequently affecting human health. To address these issues, an experiment was conducted to investigate the mitigating effects of iron nanoparticles (Fe-NPs) on arsenic and ammonia toxicity as well as high temperature stress (As+NH+T).

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Brassica carinata (BBCC) commonly referred to as Ethiopian mustard is a natural allotetraploid containing the genomes of Brassica nigra (BB) and Brassica oleracea (CC). It is an oilseed crop endemic to the northeastern regions of Africa. Although it is under limited cultivation, B.

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Chalk, an undesirable grain quality trait in rice, is primarily formed due to high temperatures during the grain-filling process. Owing to the disordered starch granule structure, air spaces and low amylose content, chalky grains are easily breakable during milling thereby lowering head rice recovery and its market price. Availability of multiple QTLs associated with grain chalkiness and associated attributes, provided us an opportunity to perform a meta-analysis and identify candidate genes and their alleles contributing to enhanced grain quality.

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  • The study highlights the urgent need to understand drug resistance, focusing on genetic factors involved in resistance among clinical strains.
  • Researchers found new links between mutations in DNA repair genes and multidrug resistance, revealing that these mutations affect the function of critical proteins like MutY and UvrB.
  • In experiments, strains with the MutY variant outperformed wild-type strains under antibiotic stress, suggesting that these genetic changes help bacteria survive antibiotic treatments.
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Seed size/weight is a multigenic trait that is governed by complex transcriptional regulatory pathways. An understanding of the genetic basis of seed size is of great interest in the improvement of seed yield and quality in oilseed crops. A global transcriptome analysis was performed at the initial stages of seed development in two lines of , small-seeded EH-2 and large-seeded PJ.

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In the present study, the bioaccumulation of chromium, manganese, cobalt, copper, zinc, selenium, arsenic, strontium, cadmium, tin, antimony and lead in tissues of thirty marine fish species collected from New Ferry Whorf, Sassoon dock and Versova fishing harbour in Mumbai, India, were analysed. The bioaccumulation patterns of these twelve elements were determined to assess pollution biomarkers based on cellular and oxidative stresses. Catalase, superoxide dismutase and glutathione-s-transferase, glycolytic enzymes viz.

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  • Brassica nigra, or black mustard, is an important condiment crop in India and a progenitor of the oilseed crop B. juncea.
  • The genome assembly of the B. nigra variety Sangam was performed using advanced sequencing techniques, resulting in a comprehensive assembly covering about 515.4 Mb and revealing 57,249 protein-coding genes.
  • The study found significant gene colinearity with B. juncea, while highlighting structural differences in gene arrangements within the A, B, and C genomes of U's triangle, leading to a proposed new nomenclature for B. nigra pseudochromosomes.
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Climate change impact has disturbed the rainfall pattern worsening the problems of water availability in the aquatic ecosystem of India and other parts of the world. Arsenic pollution, mainly through excessive use of groundwater and other anthropogenic activities, is aggravating in many parts of the world, particularly in South Asia. We evaluated the efficacy of selenium nanoparticles (Se-NPs) and riboflavin (RF) to ameliorate the adverse impacts of elevated temperature and arsenic pollution on growth, anti-oxidative status and immuno-modulation in Pangasianodon hypophthalmus.

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  • Brassica juncea, or mustard, is an allopolyploid formed from the diploid species B. rapa and B. nigra, and the study focuses on the genome assembly of a specific variety called Varuna.
  • Using advanced sequencing techniques, researchers created a high-quality genome assembly with a large N50 value, improving upon previous drafts and validating the B genome through genetic mapping.
  • The analysis reveals significant differences in transposons, gene content, and gene arrangement between the A and B genomes, which can aid in breeding efforts for mustard varieties grown in South Asia.
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  • - White rust, caused by an oomycete, poses a significant threat to oilseed mustard, especially in the highly susceptible Indian gene pool, while some East European lines show resistance mapped to specific genomic regions.
  • - A new resistance locus against isolate AcB1 has been identified in a Chinese mustard line (Tumida), using a mapping population derived from a cross with a susceptible Indian line (Varuna) and involving over 8,000 genetic markers.
  • - The candidate gene for resistance is a CC-NBS-LRR (CNL) type R gene that differs in structure between resistant and susceptible varieties, revealing potential similarities between resistance genes across different mustard lines.
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Following the publication of this article [1], the authors reported that the captions of Figs. 2 and 3 were published in the incorrect order, whereby they mismatch with their corresponding images. The figures are reproduced in the correct sequence with the correct captions in this Correction article.

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Background: Alternaria brassicae, a necrotrophic pathogen, causes Alternaria Leaf Spot, one of the economically important diseases of Brassica crops. Many other Alternaria spp. such as A.

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Chromium (Cr), one of the most abundant and hazardous heavy metals, is generally observed to be widely distributed in environment, primarily due to the inter-mixing of the untreated domestic and industrial wastewaters. There has been an increased interest to replace conventional centralized treatment technologies with the low energy, low cost, and zero sludge producing decentralized constructed wetland technology. Therefore, a long-term investigation on the comparative metal removal efficiency of the experimental vertical sub-surface flow (VSSF) constructed wetland systems, irrigated with Cr-spiked ground waters, under both mono and mixed-culture conditions planted with five different macrophytes viz.

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An experiment was designed to delineate the efficacy of a dietary mixture of selenium nanoparticles (Se-NPs) and riboflavin (RF) on the thermal efficiency/tolerance of Pangasianodon hypophthalmus reared under arsenic (2.8 mg/L) and high-temperature (34 °C) stress. A green synthesis method was employed for the synthesis of Se-NPs using fish gills, which are normally discarded as by-products.

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  • BjuWRR1 is a newly identified resistance gene from a Brassica juncea line that was validated to provide protection against the white rust disease caused by Albugo candida, a major threat to crucifer crops.
  • Earlier research mapped a resistance locus, AcB1-A5.1, in a specific east European Brassica juncea line, Donskaja-IV, which showed complete resistance to various isolates of the pathogen.
  • The BjuWRR1 gene was genetically transformed into a susceptible Indian line, Varuna, successfully conferring full resistance, marking it as the first resistance gene identified for white rust in Brassica species.
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Unexpected fluctuations in weather parameters due to global climate change have been observed in all ecosystems worldwide. The aquatic ecosystem shelters a great diversity of fishes in the upper region of the ecosystem which adversely get affected due to their poikilothermic nature. The present study was designed to elucidate the impact of critical temperature minima (CTMin), lethal temperature minima (LTMin), critical temperature maxima (CTMax), and lethal temperature maxima (LTMax) on Channa striatus.

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A preliminary study was conducted to delineate the ameliorating effect of dietary zinc nanoparticles (Zn-NPs) against thermal stress in Pangasius hypophthalmus reared under concurrent exposure to lead (Pb) and elevated temperature (34°C). Three diets were formulated such as control (no Zn-NPs), Zn-NPs 10 and 20mg/kg diet. Two hundred and thirty four fish were randomly distributed in to six treatments groups in triplicates; such as control group (no Zn-NPs in diet and unexposed to Pb and temperature, Ctr/Ctr), control diet with concurrent exposure to Pb and temperature (Pb-T/Ctr), Zn-NPs 10 and 20mg/kg without stressors (Zn-NPs 10mg/kg, Zn-NPs 20mg/kg), Zn-NPs 10 and 20mg/kg diet with concurrent exposure to Pb and temperature (Pb-T/Zn-NPs 10mg/kg, Pb-T/Zn-NPs 20mg/kg).

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The abiotic and biotic stress is an episode that effect on regulatory, neuro-endocrine and immune systems of animals including fish. The stress creates stimulatory and suppressive of immune system resulting in increases the incidence of infection. In view of these points, we have conducted an experiment to mitigate the stress through a nutritional approach through Zinc (Zn) supplementation in Pangasius hypophthalmus (initial weight-3.

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Transgenic cotton was developed using two constructs containing a truncated and codon-modified cry1Ac gene (1,848 bp), which was originally characterized from Bacillus thuringiensis subspecies kurstaki strain HD73 that encodes a toxin highly effective against many lepidopteran pests. In Construct I, the cry1Ac gene was cloned under FMVde, a strong constitutively expressing promoter, to express the encoded protein in the cytoplasm. In Construct II, the encoded protein was directed to the plastids using a transit peptide taken from the cotton rbcSIb gene.

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  • Identified the genetic locus for tetralocular ovary (tet-o) in Brassica rapa and established a connection between the number of locules and silique width.
  • The yellow sarson group, a variety of B. rapa found in eastern India, exhibits both bilocular and tetralocular ovaries, with tetralocular types showing increased silique width.
  • Mapping indicated that the tet-o locus is located on linkage group A4 and is linked to a candidate gene (Bra034340), enhancing knowledge for breeding and understanding evolutionary changes in cultivated Brassica.
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  • Brassica species, part of the Brassiceae tribe, evolved through two rounds of polyploidization, leading to the formation of both diploid and allopolyploid species from a common hexaploid ancestor.
  • Molecular studies support the theory of a genome triplication origin for these species and show a complex evolutionary history involving distinct lineages.
  • Analysis of genetic data revealed significant divergence timelines among the species, indicating that at least two independent genome triplication events contributed to the development of different Brassica lineages.
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