Key word: Microencapsulation. Spray drying, Soy Milk, L. fermentum ..................................................................................................................................................................
Key words: Anther culture, Callus initiation, Indica rice .....................................................................................................................................................................
7. Journal of Cell and Tissue Research 17(3) 6257-6262 (2017)
In vitro callus proliferation and shooting protocols from explants of Phyllanthus virgatus G. forst: A potential medicinal plant
Salamma, S. and Ravi Prasad Rao, B.
Department of Botany, Sri Krishnadevaraya University, Anantapuramu 515003. (Andhra Pradesh).
E. mail: biodiversityravi@gmail.com
Abstract: In view of its medicinal importance, a standard regeneration protocol from mature explants has been established for a tropical medicinal herb, Phyllanthus virgatus. Nodes and internodes have shown 60% of shoot induction and 70% of callus induction response on 0.1% HgCl2. Highest mean callus (43.16±0.33) was found on MS medium supplemented with 2.5mg-l Picloram from internodes. Maximum shoot induction (5.37 ± 0.12) was achieved on MS medium fortified with 0.5mg-l KN + 1.5mg-l Picloram with 87% of sprouting frequency. Maximum mean length of shoots (3.24 ± 0.11) was obtained on MS medium augmented with 0.5mg-l KN + 2mg-l Picloram.
Key words: Phyllanthus virgatus, , Callus induction
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8. Journal of Cell and Tissue Research 17(3) 6263-6268 (2017)
Molecular charecterization of HSP70 gene in Kenguri breed of sheep using PCR-SSCP technique
Dodamani, S., Appannavar, M.M., Ramesha, K.P., Suranagi, M.D., Tandale, M.K. and Kartikesh, S.M.
Department of Animal Genetics and Breeding, Veterinary College, Hassan 577202 (Karnataka);
E. Mail: Shri537@gmail.com,
Abstract: PCR-SSCP analysis of HSP70 gene was carried out in Kenguri breed of sheep to characterize HSP70 gene. The fragments consisting exon 1, 2, 3, 4 and 5 were of 490, 469, 525, 307 and 352 bp size. The exons 2, 3 and 4 of HSP70 gene showed monomorphism with similar pattern in all the 48 animals studied. Two unique SSCP patterns with a pattern frequency of 0.1875 and 0.8125, respectively were observed in fragment 1 comprising Exon1. Two SSCP patterns with a pattern frequency of 0.3541 and 0.6458 were observed in fragment 5 comprising Exon 5 of HSP70 gene. The analysis of fragment 1comprising Exon 1 revealed T170C (Methionineà Thrionine), A210G (Arginineà Glycine) and G504A (GlycineàArginine) amino acid substitution showing transition while for fragment 5 compromising Exon 5 the observed polymorphisms at G2033C (Glycineà Alanine) amino acid substitution showed transversion. The obtained polymorphism may be a characteristic of kenguri sheep.
Key word: HSP70 gene, Kenguri sheep
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9. Journal of Cell and Tissue Research 17(3) 6269-6277 (2017)
RNA editing and its role in crop improvement: A review
Mehraj, U., Sheikh, F.A., Ahmad, M. and Sofi, N.R.
Division of genetics and Plant Breeding, Wadura, Sopore Kargil, Sheri- Kashmir University of Agriculture Science and Technology Shalimar Kashmir, India. E. mail: uzmamehrajskuastk@rediffmail.com
Abstract: RNA editing is a posttranscriptional modification to nuclear, mitochondrial or chloroplast genome-encoded transcripts and distinct from the events of RNA splicing, capping or polyadenylation and occurs in a wide range of organisms. It was discovered in 1986 in Trypanosoma brucei where uridines were inserted at specific sites in the mitochondrial (kinetoplast) cytochrome C oxidase II (coxII) transcript to restore the proper protein-coding sequence mediated by guide RNA (gRNA), followed by a report that described deletion of uridines in coxIII mRNA. RNA editing by cytidine (C) to uridine (U) conversions is widespread in plant mitochondria and was discovered in chloroplasts two years later. In some plant taxa, “reverse” U-to-C editing also occurs in flowering plants. In Arabidopsis, 43 sites are edited in the chloroplast and 619 in the mitochondria. In many cases, amino acid alterations caused by RNA editing are essential for the expression of functional proteins. Most RNA editing events can restore the evolutionarily conserved amino acid residues in mRNAs or create translation start and stop codons. Therefore, RNA editing is an essential process to maintain genetic information at the RNA level. RNA editing expands the genetic information, thus making the environment more adaptable to the organisms. RNA editing played an important role in the normal mitochondrial function. Cytoplasmic male sterility was induced after transferring unedited atp9 gene into fertile tobacco, and this confirmed the correlation between the RNA editing of atp9 gene and tobacco cytoplasmic male sterility. Individual RNA editing sites are recognized by plant-specific pentatricopeptide repeat (PPR) proteins that are encoded in the nuclear genome. These PPR proteins are characterized by repeat elements that bind specifically to RNA sequences upstream of target editing sites and rapid expansion in number of PPR genes permitted RNA editing on a large scale.
Key words: RNA, Crop improvement
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10. Journal of Cell and Tissue Research 17(3) 6279-6283 (2017)
Loopholes in sperm sexing of farm animals: A review
Buragohain, L. and Bharali, A.
Department of Animal Biotechnology, College of Veterinary Science, AAU, Khanapara, Guwahati 781022 (Assam).
E. mail: lukumoni.buragohain54@gmail.com
Abstract: Successful pre-selection of sex before fertilization is pre-requisite to increase the production of either large or small animal farms. In past few decades different investigators have used different properties like charge, size, volume, density, surface antigen etc. of spermatozoa to separate X and Y chromosome bearing spermatozoa. But most of the developed sperm sorting techniques to differentiate X and Y sperm are of limiting nature. Among the several techniques developed only one (flow cytometric) could be validated scientifically which is efficient and have accuracy of 85-95 % to resolve discrete sperm population of most farm animals on the basis of DNA content in X and Y sperm. However, sexed semen of cattle is commercially obtainable but it is expensive and have low fertility rate. Thus it opens a new window for the researches to bloom a new effective and inexpensive sperm sorting technique without compromising the fertility.
Key words: Sperm sexing
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11. Journal of Cell and Tissue Research 17(3) 6285-6292 (2017)
Biology and biotechnology of mango (Mangifera indica L.) with reference to in vitro cell and tissue culture in endangered and endemic cultivars: A review
Bimal, R. and Singh, A.K.
Biotechnology Lab, University Department of Botany, B.R.A Bihar University, Muzaffarpur-842001. E. mail: raageeva@gmail.com
Abstract : Mango the ‘king of fruits’ is an important tropical fruit crop of family Anacardiaceae, probably under cultivation since 4000 years, and possesses more than 1000 known cultivars in Indian subcontinent. However, the mango cultivation faces many problems viz. long juvenile period, irregular bearing of fruits, fungal, bacterial diseases, loss of important germplasms and inconvenience in hybridization experiments which necessitates extensive studies. The effects of hostile changes in mango tree physiology and fruit production is another area of research which needs serious attention. The tools and techniques of plant biotechnology offer reproducible and reliable protocols for somatic embryogenesis, regeneration of improved cultivars, micropropagation and germplasm conservation of economically significant cultivars. In the present review, biology and biotechnology of Mangifera indica has been described with specific reference to morphogenetic studies and somatic embryogenesis in the two endangered mango cultivars var. Zardalu and var. Sepia endemic to Bihar State (India) for the first time.
Key words: Mango cultivars, Somatic embryo, Tissue culture
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12. Journal of Cell and Tissue Research 17(3) 6293-6298 (2017)
Riboflavin metabolism: Current status and future possibilities: A review
Dey, M. and Bandyopadhyay, D.
Oxidative Stress and Free Radical Biology Laboratory, Department of Physiology, University of Calcutta, University College of Science and Technology, 92, APC Road, Kolkata 700 009. E. mail: debasish63@gmail.com
Abstract: The role of riboflavin resides in its being the precursor of flavin mono nucleotide (FMN) and flavin-adenine-dinucleotide (FAD), two coenzymes that are required for a wide variety of important oxidation-reduction reaction. The flavoproteins are involved at least peripherally in every metabolic pathway. For normal cellular functions, the concentration of FMN & FAD within the cell should be maintained at an optimum level. This depends upon the riboflavin metabolizing enzymes which converts riboflavin to FMN and FAD. There are several important works explaining the nature and mechanism of action of the enzymes involved in riboflavin metabolism. The flavoproteins are important component of the enzyme complexes involved in mitochondrial electron transport chain. The level of reduced glutathione in our body depends upon the riboflavin status. This indicates that for combating oxidative stress related disorders, the level of flavoproteins should be maintained at an optimum level. Besides, clinically riboflavin has several applications. Research supports the use of riboflavin and its metabolites (FMN and FAD) in amelioration of a wide number of clinical conditions.
Key words: Riboflavin, FMN, FAD.
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13. Journal of Cell and Tissue Research 17(3) 6299-6306 (2017)
Significant association of legume-Rhizobia symbiosis: A review
Khunt, M.D. and Mahatma, L.
Department of Plant Pathology, N. M. College of Agriculture, Navsari Agricultural University, Navsari 396 450 (Gujarat).
E. mail: mahatmalalit@yahoo.co.in,
Abstract: Many kind of relationship between the different organisms occur in nature. Among these, the symbiotic relationship between the Rhizobium sp and legumes is the most significant relationship. If this relationship would not have exist, certainly we would be million year behind in evaluation. This is the relationship which principally has lead to conversion of inorganic inert nitrogen in the ionic form and made available for the assimilation in the organic form by the plant. This was not only the driving force to evolve the legumes and establish as one of the largest family in the plant, but also has lead to the subsequent cumulative accumulation of nitrogen in the different tropic levels. Significant development has been takes place in the understanding this plant-microbe interactions since inception of biological world. Different native and potential isolates of Rhizobium sp. have been explored from different parts of the world that can mitigate abiotic stress in plants like salinity, sodicity, acidity, temperature, heavy metals, etc. apart from nitrogen fixation. Symbiotic interaction between plant and Rhizobia can be enhanced by several conventional ways as well as genetic manipulations. Detail of the same has been discussed in the review.
Key words: Rhizobium, Legume, Symbiosis
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14. Journal of Cell and Tissue Research 17(3) 6307-6314 (2017)
Male infertility owing to pesticide poisoning and antioxidant induced amelioration: A review
Bhardwaj, J.K., Kumari, P., Saraf, P., Mittal, M. and Yadav, A.S.
Reproductive Physiology Laboratory, Department of Zoology, Kurukshetra University, Kurukshetra 136119 (Haryana).
E. mail: jkbkuk@gmail.com
Abstract: Male infertility is one of the greatest matter of concern as reproductive potential of an organism plays a pivotal role in maintaining growth of a particular population. But during last several decades there has been extensive use of pesticides, to fulfill the increasing population demands. These ever-increasing use of environmental contaminants has introduced various detrimental effects on male fertility. Several studies described the effects of pesticides and their mode of action either by inducing oxidative stress through the generation of free radicals, genotoxicity or through endocrine disruption both in in vitro and in vivo condition. This might be one of the reasons of pesticides contributing in male infertility. In addition, antioxidants serve as the most beneficial compounds in combating deleterious impact induced by different pesticides. This review compiles the degenerative effects of pesticides on male reproductive system and its physiology with the various modes of actions associated with it; it also focuses on the efficient role of antioxidants against pesticide poisoning. Along with this, it is also necessary to educate the farmers about pesticides safe use, and find out ecologically safe alternatives to pesticides exposure so as to minimize the male reproductive health risk.
Key words: Infertility; Pesticides; Antioxidant
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15. Journal of Cell and Tissue Research 17(2) 6315-6321 (2017)
Nanotechnology in drinking water purification: A critical review
Gupta, P.D., Muthukumar, A., Shilpa, V., Abubakar, G. and Sood, P.P.
Adjunct Professor, Manipal University, Manipal, (Karnataka) E. mail: pdg2000@hotmail.com
Abstract: With rapidly growing economy and burgeoning population, the global water resources are seriously affected by pollution. However, for providing safe drinking water to people, novel innovative technology that can ensure total quality of drinking water is required. Nanotechnology emerges as a revolutionary technology that can helps to address key needs related to energy and environment. The environmental fate and toxicity of a nanomaterial is one of the major drawbacks of nanotechnology in using for water purification. To overcome these drawbacks, the novel nanotechnologies have been developed in recent years. In this article, an overview of advances in nanotechnology for water treatment processes is mentioned, including nanobased materials such as, nanoadsorbents, nanometals, nanomembranes, photocatalysts and some other novel techniques.
Key words: Nanotechnology; Water purification
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. Journal of Cell and Tissue Research 17(2) 6323-6334 (2017)
Molecular mechanism of disease resistance in plants: A review
Sahni, S., Prasad, B.D., Kumar, G. and Ranjan, T.
Department of Plant Pathology, T.C.A., Dholi, Dr. Rajendra Central Agricultural University, Pusa (Bihar). E. mail: dev.bishnu@gmail.com. (829) 806-2075
Abstract: Plants are extremely important sources of food or energy for human beings. For this reason, reducing the pre- and post-harvest crop loss due to numerous diseases constitutes one of the most serious challenges for catching up with the nutritional needs of the continuously growing world population. Ever since Harold Flor, a geneticist who worked with flax plants and flax rust (a foliar disease), first outlined the gene-for-gene concept in the 1940s and 1950s, immense efforts have been made to develop low cost, environmentally-friendly approaches through engineering durable disease resistance in economically important crops instead of applying environmentally-harmful pesticides. Unfortunately, many of these attempts have failed. Until now, the control of plant disease has indeed been mainly dependent on pesticide application. Nevertheless, the development of sustainable agriculture requires better strategies for controlling plant diseases. The most promising way to generate a disease-resistant crop is most likely the manipulation of the target genes implicated in the induced resistance to pathogens or the signal transduction pathways controlling the expression of the defense-related genes.
Key words: Disease resistance plants
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