Towards Optimizing the Impact of Tissue Culture Banana in Kenya

2014 ◽  
pp. 115-131 ◽  
Author(s):  
M. M. Njuguna ◽  
F. M. Wambugu
Keyword(s):  
Tissue Culture ◽  
The Impact

scholarly journals Application of Plant Extracts in Micropropagation and Cryopreservation of Bleeding Heart: An Ornamental-Medicinal Plant Species

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 542
Author(s):  
Dariusz Kulus ◽  
Natalia Miler
Keyword(s):  
Tissue Culture ◽  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Plant Extracts ◽  
The Other ◽  
White Gold ◽  
Natural Extracts ◽  
Other Hand ◽  
The Impact

Lamprocapnos spectabilis (L.) Fukuhara (bleeding heart) is valued both in the horticultural and pharmaceutical markets. Despite its great popularity, information on the in vitro tissue culture technology in this species is limited. There is also little knowledge on the application of plant extracts in the tissue culture systems of plants other than orchids. The aim of this study is to compare the utility of traditional plant growth regulators (PGRs) and natural extracts—obtained from the coconut shreds, as well as oat, rice, and sesame seeds—in the micropropagation and cryopreservation of L. spectabilis ‘Gold Heart’ and ‘White Gold’. The biochemical analysis of extracts composition is also included. In the first experiment related to micropropagation via axillary buds activation, the single-node explants were cultured for a 10-week-long propagation cycle in the modified Murashige and Skoog medium fortified either with 1.11 µM benzyladenine (BA) and 1.23 µM indole-3-butritic acid (IBA) or with 10% (v/v) plant extracts. A PGRs- and extract-free control was also considered. In the cryopreservation experiment, the same 10% (v/v) extracts were added into the medium during a seven-day preculture in the encapsulation-vitrification cryopreservation protocol. It was found that the impact of natural additives was cultivar- and trait-specific. In the first experiment, the addition of coconut extract favoured the proliferation of shoots and propagation ratio in bleeding heart ‘Gold Heart’. Rice extract, on the other hand, promoted callus formation in ‘White Gold’ cultivar and was more effective in increasing the propagation ratio in this cultivar than the conventional plant growth regulators (4.1 and 2.6, respectively). Sesame extract suppressed the development of the explants in both cultivars analysed, probably due to the high content of polyphenols. As for the second experiment, the addition of plant extracts into the preculture medium did not increase the survival level of the cryopreserved shoot tips (sesame and oat extracts even decreased this parameter). On the other hand, coconut extract, abundant in simple sugars and endogenous cytokinins, stimulated a more intensive proliferation and growth of shoots after rewarming of samples. Analysing the synergistic effect of conventional plant growth regulators and natural extracts should be considered in future studies related to L. spectabilis.

scholarly journals The impact of sonication cultures when the diagnosis of prosthetic joint infection is inconclusive

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0252322
Author(s):  
Taiana Cunha Ribeiro ◽  
Emerson Kiyoshi Honda ◽  
Daniel Daniachi ◽  
Ricardo de Paula Leite Cury ◽  
Cely Barreto da Silva ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Diagnostic Criteria ◽  
Gold Standard ◽  
Joint Infection ◽  
Clinical Criterion ◽  
Tissue Cultures ◽  
Prosthetic Joint ◽  
Prosthetic Joint Infections ◽  
The Impact ◽  
Sonication Culture

Background In the absence of a gold standard criterion for diagnosing prosthetic joint infections (PJI), sonication of the removed implant may provide superior microbiological identification to synovial fluid and peri-implant tissue cultures. The aim of this retrospective study was to assess the role of sonication culture compared to tissue cultures for diagnosing PJI, using different consensus and international guidelines for PJI definition. Methods Data of 146 patients undergoing removal of hip or knee arthroplasties between 2010 and 2018 were retrospectively reviewed. The International Consensus Meeting (ICM-2018), Musculoskeletal Infection Society (MSIS), Infectious Diseases Society of America (IDSA), the European Bone and Joint Infection Society (EBJIS), and a modified clinical criterion, were used to compare the performance of microbiological tests. McNemar´s test and proportion comparison were employed to calculate p-value. Results Overall, 56% (82/146) were diagnosed with PJI using the clinical criteria. Out of these cases, 57% (47/82) tested positive on tissue culture and 93% (76/82) on sonication culture. Applying this clinical criterion, the sensitivity of sonication fluid and tissue cultures was 92.7% (95% CI: 87.1%- 98.3%) and 57.3% (95% CI: 46.6%-68.0%) (p<0.001), respectively. When both methods were combined for diagnosis (sonication and tissue cultures) sensitivity reached 96.3% (95% CI: 91.5%-100%). Sonication culture and the combination of sonication with tissue cultures, showed higher sensitivity rates than tissue cultures alone for all diagnostic criteria (ICM-18, MSIS, IDSA and EBJIS) applied. Conversely, tissue culture provided greater specificity than sonication culture for all the criteria assessed, except for the EBJIS criteria, in which sonication and tissue cultures specificity was 100% and 95.3% (95% CI: 87.8–100%), respectively (p = 0.024). Conclusions In a context where diagnostic criteria available have shortcomings and tissue cultures remain the gold standard, sonication cultures can aid PJI diagnosis, especially when diagnostic criteria are inconclusive due to some important missing data (joint puncture, histology).

scholarly journals Plants regenerated from tissue culture contain stable epigenome changes in rice

eLife ◽  
2013 ◽  
Vol 2 ◽  
Author(s):  
Hume Stroud ◽  
Bo Ding ◽  
Stacey A Simon ◽  
Suhua Feng ◽  
Maria Bellizzi ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Phenotypic Variability ◽  
Whole Genome ◽  
Single Nucleotide ◽  
Protein Coding ◽  
Protein Coding Genes ◽  
Regenerated Plants ◽  
Nucleotide Resolution ◽  
The Impact ◽  
Single Nucleotide Resolution

Most transgenic crops are produced through tissue culture. The impact of utilizing such methods on the plant epigenome is poorly understood. Here we generated whole-genome, single-nucleotide resolution maps of DNA methylation in several regenerated rice lines. We found that all tested regenerated plants had significant losses of methylation compared to non-regenerated plants. Loss of methylation was largely stable across generations, and certain sites in the genome were particularly susceptible to loss of methylation. Loss of methylation at promoters was associated with deregulated expression of protein-coding genes. Analyses of callus and untransformed plants regenerated from callus indicated that loss of methylation is stochastically induced at the tissue culture step. These changes in methylation may explain a component of somaclonal variation, a phenomenon in which plants derived from tissue culture manifest phenotypic variability.

scholarly journals Effect of axenic culture and NAA in Vitro on masoyi (Cryptocarya massoy (Oken) Kosterm) seeds regeneration

2021 ◽  
Vol 914 (1) ◽  
pp. 012016
Author(s):  
Y Wibisono ◽  
A I Putri ◽  
Y Hadiyan ◽  
L Haryjanto ◽  
L Hakim ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Germination Rate ◽  
Axenic Culture ◽  
Culture Method ◽  
Ms Medium ◽  
Controlled Conditions ◽  
Axenic Cultures ◽  
One Year ◽  
The Impact

Abstract The high valuable endemic commodities in Papua, Masoyi’s (Cryptocarya massoy) population facing great threat due to unsustainable harvest system. Generative propagation faces significant challenges due to seed characteristics and habitat conditions. Controlled conditions and the role of hormones have an important effect on generative growth. This study aimed to determine the influence of axenic culture with sterilization treatments Isothiazolone Biocide (IB) and 1-Naphtaleaneacetic Acid (NAA) in Murashige and Skoog (MS) medium on seed regeneration and to observe the development of seedlings at the acclimatization stage. The tissue culture method was used. The highest percentage of axenic cultures (57%) was obtained with 5% of BI. The germination rate of masoyi seeds was achieved by 100%. Furthermore, it showed varied responses depending upon concentrations of NAA, the addition of 1 ml l−1 NAA in MS medium is recommended. Acclimatization has been successfully carried out in the greenhouse (67% survival rate) and excellent seedlings growth at nursery (52.35 + 0.6 cm in height after one year transferred). The impact of the controlled conditions and the addition of NAA to axenic cultures in vitro increased the germination of masoyi seeds. Axenic culture and hormones were also important requirements for mass propagation of masoyi by tissue culture.

scholarly journals Biotization of tissue culture banana plantlets with Methylobacterium salsuginis to enhance the survival and growth under greenhouse and open environment condition

2021 ◽  
Vol 42 (6) ◽  
pp. 1452-1460
Author(s):  
P. Pushpakanth ◽  
◽  
R. Krishnamoorthy ◽  
R. Anandham ◽  
M. Senthilkumar ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Chlorophyll Content ◽  
Growth Parameters ◽  
Lower Surface ◽  
Culture Vessel ◽  
Environmental Condition ◽  
Open Environment ◽  
Number Of Leaves ◽  
Survival And Growth ◽  
The Impact

Aim: This study aimed to investigate the impact of M. salsuginis TNMB03 biotization on tissue culture banana cv. Grande Naine plantlets growth and survival under greenhouse and open environmental condition (exposed to direct sunlight). Methodology: Banana plantlets were transferred from culture flasks to protray and maintained under the greenhouse and open environmental condition for 30 days with or without M. salsuginis TNMB03 treatment. After 30 days, plant growth parameters like pseudostem height, girth, number of leaves, leaf area, fresh and dry biomass, root parameters, plantlet survival, chlorophyll a and b, total chlorophyll, carotenoids and soluble protein and Methylobacterium population in upper and lower surface of leaf, as well as endophytic population were assessed. Results: This study showed that the plantlets biotized with M. salsuginis TNMB03 had better acclimatization response under both the experimental condition than that of uninoculated plantlets. Positive influence on the survival and growth of M. salsuginis TNMB03 biotized plantlets was observed when transferred directly to greenhouse and open environmental condition. Inoculation of M. salsuginis TNMB03 increased the plant height, girth and number of leaves, root length, lateral root and biomass in comparison to the uninoculated plantlets in greenhouse and open environment. Uninoculated plantlets kept under open environment had lower chlorophyll content and sun scorching damages compared to M. salsuginis TNMB03 inoculated plants, which had dark green leaves and increased chlorophyll content. Interpretation: This study shows a new potential technique of using M. salsuginis TNMB03 in tissue culture plantlets, which can help in enhancing the growth of plantlets transferred from culture vessel to greenhouse or open environmental condition without undergoing the routine acclimatization procedure.

Improvement of in situ Follicular Activation and Early Development in Cryopreserved Human Ovarian Cortical Tissue by Co-Culturing with Mesenchymal Stem Cells

2019 ◽  
Vol 208 (1-2) ◽  
pp. 48-58
Author(s):  
Marzieh Hosseini ◽  
Saghar Salehpour ◽  
Marefat Ghaffari Novin ◽  
Zahra Shams Mofarahe ◽  
Mohammad-Amin Abdollahifar ◽  
...  
Keyword(s):  
Gene Expression ◽  
Stem Cells ◽  
Cell Proliferation ◽  
Tissue Culture ◽  
Mesenchymal Stem Cells ◽  
Ovarian Tissue ◽  
Follicular Development ◽  
Cortical Tissue ◽  
Culture Systems ◽  
The Impact

Follicular loss and tissue degeneration are great challenges in ovarian tissue culture systems. Mesenchymal stem cells (MSC) secrete a cocktail of growth factors and cytokines which supports adjacent cells and tissues. The aim of the current study was to investigate the impact of human bone marrow (hBM)-MSC, as co-culture cells, on human follicular development in ovarian cortical tissue (OCT) culture. For this purpose, warmed OCT fragments were co-cultured with hBM-MSC for 8 days and compared to monocultured OCT. During the culture period, ovarian follicle survival and development in the OCT were evaluated using histological observation, follicular developmental-related genes expression, and estradiol production. Furthermore, cell proliferation and apoptosis were assessed. The results showed that there were no significant differences in conserved ovarian follicles with a normal morphology between the two groups. However, the percentage of developing follicles, as well as follicular developmental gene expression, significantly increased in the co-culture group compared to the monoculture group. On the other hand, compared with the monoculture group, the co-culture group demonstrated a significant increase in cell proliferation, indicated by Ki67 gene expression, as well as a dramatic decrease in apoptotic cell percentage, revealed by TUNEL assay. These findings indicated that co-culturing of hBM-MSC with OCT could improve follicular activation and early follicular development in human ovarian tissue culture systems.

scholarly journals HIV-1 Group O Integrase Displays Lower Enzymatic Efficiency and Higher Susceptibility to Raltegravir than HIV-1 Group M Subtype B Integrase

2014 ◽  
Vol 58 (12) ◽  
pp. 7141-7150 ◽  
Author(s):  
Agnès Depatureaux ◽  
Peter K. Quashie ◽  
Thibault Mesplède ◽  
Yingshan Han ◽  
Hannah Koubi ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Competitive Inhibition ◽  
Strand Transfer ◽  
Coding Region ◽  
Long Terminal Repeats ◽  
Enzymatic Function ◽  
Subtype B ◽  
The Impact ◽  
Divergent Strain ◽  
Hiv 1

ABSTRACTHIV-1 group O (HIV-O) is a rare HIV-1 variant characterized by a high number of polymorphisms, especially in the integrase coding region. As HIV-O integrase enzymes have not previously been studied, our aim was to assess the impact of HIV-O integrase polymorphisms on enzyme function and susceptibility to integrase inhibitors. Accordingly, we cloned and purified integrase proteins from each of HIV-1 group O clades A and B, an HIV-O divergent strain, and HIV-1 group M (HIV-M, subtype B), used as a reference. To assess enzymatic function of HIV-O integrase, we carried out strand transfer and 3′ processing assays with various concentrations of substrate (DNA target and long terminal repeats [LTR], respectively) and characterized these enzymes for susceptibility to integrase strand transfer inhibitors (INSTIs) in cell-free assays and in tissue culture, in the absence or presence of various concentrations of several INSTIs. The inhibition constant (Ki) and 50% effective concentration (EC50) values were calculated for HIV-O integrases and HIV-O viruses, respectively, and compared with those of HIV-M. The results showed that HIV-O integrase displayed lower activity in strand transfer assays than did HIV-M enzyme, whereas 3′ processing activities were similar to those of HIV-M. HIV-O integrases were more susceptible to raltegravir (RAL) in competitive inhibition assays and in tissue culture than were HIV-M enzymes and viruses, respectively. Molecular modeling suggests that two key polymorphic residues that are close to the integrase catalytic site, 74I and 153A, may play a role in these differences.

scholarly journals Diversity Induction of Dendrobium sylvanum Orchid through In Vitro Irradiation of Gamma Ray

2018 ◽  
Vol 10 (3) ◽  
pp. 691-697
Author(s):  
Eka Puji Lestari ◽  
Ahmad Yunus ◽  
Sugiyarto Sugiyarto
Keyword(s):  
Tissue Culture ◽  
Gamma Ray ◽  
Leaf Length ◽  
The Other ◽  
New Variety ◽  
New Finding ◽  
Long Time ◽  
Gamma Ray Irradiation ◽  
The Impact

Dendrobium sylvanum orchid is categorized as lowland habitus orchid and able to survive wihtout any shade. Orchid cultivation takes a very long time so it needs faster cultivation and producing large quantities. Therefore, it is necessary to do orchid culture by using tissue culture processes and then given gamma ray irradiation to bring up new characters in the orchid .The purpose of this research was to discover the impact of gamma ray irradiation in vitro to the diversity of D. sylvanum. The doses of gamma ray used in this research were 0 Gy, 15 Gy, 30 Gy, 45 Gy, and 60 Gy. The results obtained indicated that mutation mostly occurred on the treatment with 15 Gy (4.4 cm of plant height, 2.67 of leaves, 2.36 cm of leaf length, 0.49 cm of leaf width, and 5.33 of root strands) compared to the other doses and the control plants. The new finding in this research is the gamma ray dose that can optimally stimulate the mutation in D. sylvanum. This information is useful to generate the new variety in orchid cultivation in Indonesia. This research provides innovation in orchid cultivation and new variety that is possible to arise after the mutation.

scholarly journals Subunit-Selective Mutational Analysis and Tissue Culture Evaluations of the Interactions of the E138K and M184I Mutations in HIV-1 Reverse Transcriptase

2012 ◽  
Vol 86 (16) ◽  
pp. 8422-8431 ◽  
Author(s):  
Hong-Tao Xu ◽  
Maureen Oliveira ◽  
Peter K. Quashie ◽  
Matthew McCallum ◽  
Yingshan Han ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Reverse Transcriptase ◽  
Evolutionary Dynamics ◽  
Mutational Analysis ◽  
Transcriptase Inhibitor ◽  
Rnase H ◽  
Viral Fitness ◽  
Nonnucleoside Reverse Transcriptase Inhibitor ◽  
The Impact ◽  
Hiv 1

The emergence of HIV-1 drug resistance remains a major obstacle in antiviral therapy. M184I/V and E138K are signature mutations of clinical relevance in HIV-1 reverse transcriptase (RT) for the nucleoside reverse transcriptase inhibitors (NRTIs) lamivudine (3TC) and emtricitabine (FTC) and the second-generation (new) nonnucleoside reverse transcriptase inhibitor (NNRTI) rilpivirine (RPV), respectively, and the E138K mutation has also been shown to be selected by etravirine in cell culture. The E138K mutation was recently shown to compensate for the low enzyme processivity and viral fitness associated with the M184I/V mutations through enhanced deoxynucleoside triphosphate (dNTP) usage, while the M184I/V mutations compensated for defects in polymerization rates associated with the E138K mutations under conditions of high dNTP concentrations. The M184I mutation was also shown to enhance resistance to RPV and ETR when present together with the E138K mutation. These mutual compensatory effects might also enhance transmission rates of viruses containing these two mutations. Therefore, we performed tissue culture studies to investigate the evolutionary dynamics of these viruses. Through experiments in which E138K-containing viruses were selected with 3TC-FTC and in which M184I/V viruses were selected with ETR, we demonstrated that ETR was able to select for the E138K mutation in viruses containing the M184I/V mutations and that the M184I/V mutations consistently emerged when E138K viruses were selected with 3TC-FTC. We also performed biochemical subunit-selective mutational analyses to investigate the impact of the E138K mutation on RT function and interactions with the M184I mutation. We now show that the E138K mutation decreased rates of polymerization, impaired RNase H activity, and conferred ETR resistance through the p51 subunit of RT, while an enhancement of dNTP usage as a result of the simultaneous presence of both mutations E138K and M184I occurred via both subunits.

Citrus Nursery Production Guide, Chapter 4: Rootstock Selection

EDIS ◽  
2019 ◽  
Vol 2019 (5) ◽  
pp. 4
Author(s):  
Ute Albrecht ◽  
Manjul Dutt ◽  
Jude Grosser
Keyword(s):  
Tissue Culture ◽  
Nursery Production ◽  
Citrus Production ◽  
The Impact

The large number of different rootstock varieties currently available for citrus production in Florida is unprecedented. This new 4-page article, chapter 4 of the forthcoming UF/IFAS Citrus Nursery Production Guide, provides information on rootstock uses in Florida, rootstock propagation, and the impact of tissue culture, as well as factors to consider when deciding which rootstock to plant. Written by Ute Albrecht, Manjul Dutt, and Jude Grosser and published by the UF/IFAS Horticultural Sciences Department. https://edis.ifas.ufl.edu/hs1340

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