scholarly journals Unraveling Factors Affecting Micropropagation of Four Persian Walnut Varieties

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1417
Author(s):  
Togzhan Kadylbekovna Yegizbayeva ◽  
Silvia García-García ◽  
Tatyana Viktorovna Yausheva ◽  
Markhabat Kairova ◽  
Amangeldy Kairbekovich Apushev ◽  
...  
Keyword(s):  
Culture Medium ◽  
Juglans Regia ◽  
Survival Rates ◽  
Great Influence ◽  
Holistic Approach ◽  
High Survival ◽  
Factors Affecting ◽  
Persian Walnut ◽  
In Vitro Establishment

Walnuts are considered recalcitrant to tissue culture, with a great genetic determinism on all stages of micropropagation; while other factors, also with great impact, become more complicated with the reproduction of newly realized varieties. In this research, a holistic approach aimed to determine the influence of genotype and the nutritive formulation throughout the whole cycle of micropropagation of four Persian walnut varieties (Juglans regia L.) was presented. During the in vitro establishment it was determined that besides genotype and culture medium, the effect of collection season and the likely interaction amongst factors had a great influence on the successful introduction of all four genotypes. However, all cultures were affected by a deep decay, being necessary the introduction of ethylenediamine di-2-hydroxyphenyl acetate ferric, as iron source, and Phloroglucinol in both Murashige and Skoog (1962) and the corrected Driver and Kuniyuki (1987) formulations. These modifications allowed the stabilization of cultures, maintaining thereafter a steady quality. Either proliferation, rooting and ex vitro survival of four clones were affected by the culture medium, obtaining the best results with the corrected Driver and Kuniyuki (1987) formulation. Finally, in vitro plants produced from all clones were acclimated with high survival rates (75.9–91.1% for the best culture medium), depending of clone and the culture medium used. Microsatellite analysis showed that micropropagated plants maintained the same genetic profiles of their corresponding donor trees. These results might contribute to deepening of the understanding of factors that determine the success of micropropagation of walnuts, and the extents of its influence; whereas, it sets the basis for the commercial micropropagation of all four clones.

scholarly journals Clonal bamboo production based on in vitro culture

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Anatálya dos Santos Ribeiro ◽  
Alexssandra Jéssica Rondon de Figueiredo ◽  
Gabriela Cristina Rech Tormen ◽  
André Luís Lopes da Silva ◽  
Wellington Ferreira Campos ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Large Scale ◽  
Culture Medium ◽  
Clonal Plant ◽  
Adventitious Rooting ◽  
Clonal Plants ◽  
Ex Vitro ◽  
Bambusa Vulgaris ◽  
In Vitro Establishment

Bamboo species are an alternative for the composition of forest plantations. However, their potential has not been explored due to the hard time in producing large-scale clonal plants. Thus, the aim this work was to evaluate the in vitro establishment, bud multiplication and ex vitro rooting of Bambusa vulgaris. The first experiment tested different systemic and contact fungicide solutions, based on exposure time, during the establishment phase. Established explants were subjected to evaluation of residual fungicide effect on subcultures during the multiplication and elongation phases. The second experiment evaluated the influence of activated carbon on ex vitro survival and on adventitious rooting. Explant immersion in liquid culture medium added with 1.0 mL of fungicide for 120 hours has favored the in vitro establishment and reduced fungal contamination. On the other hand, it favored the shoot emission of shoots per explant during the multiplication phase. Both rooting induction culture medium and mini-incubator system use were effective in enabling adventitious root formation. The presence of activated carbon in the rooting induction culture medium resulted in a higher clonal plant survival rate.  

scholarly journals In vitro establishment of Bambusa oldhamii Munro from field-grown matrices and molecular identification of endophytic bactéria

2019 ◽  
Vol 49 ◽  
Author(s):  
Ana Paula de Azevedo Pasqualini ◽  
Gabriela Xavier Schneider ◽  
Hugo Pacheco de Freitas Fraga ◽  
Luiz Antonio Biasi ◽  
Marguerite Quoirin
Keyword(s):  
Molecular Identification ◽  
Culture Medium ◽  
Bacterial Isolate ◽  
Fungal Growth ◽  
Endophytic Bacterium ◽  
Liquid Culture Medium ◽  
Rdna Sequencing ◽  
In Vitro Establishment ◽  
Bambusa Oldhamii

ABSTRACT In plant micropropagation, the establishment stage is difficult, due to the presence of microorganisms in tissues from field-grown matrices, especially for bamboo. This study aimed to establish an efficient asepsis protocol for Bambusa oldhamii explants from field plants, as well as to carry out the molecular identification of a possible endophytic bacterial isolate. The explants were exposed to 70 % alcohol, 1 % sodium hypochlorite (NaOCl), 0.1 % mercuric chloride (HgCl2), thiophanate-methyl (Cercobin®) and chlorhexidine digluconate (2 % Riohex®) in different combinations, and introduced into Murashige and Skoog culture medium (solid or liquid), supplemented or not with 4 mL L-1 of Plant Preservative Mixture (PPMTM), totaling seven treatments. The asepsis and immersion of the explants in the liquid culture medium containing 4 mL L-1 of PPMTM visually inhibited the bacterial and fungal growth, allowed the development of shoots with a mean length of 2.2 cm and posterior subcultures, being the best treatment used for the in vitro establishment of B. oldhamii. The molecular identification of an endophytic bacterium performed by 16S rDNA sequencing allowed to identify the bacterial isolate as Ralstonia sp., with 100 % of similarity, and the phylogenetic analysis grouped it with Ralstonia pickettii. In addition, the bacterial isolate showed to be sensitive to 4 mL L-1 of PPMTM by the minimum inhibitory concentration test.

scholarly journals Effects of a commercial biocide, kasugamycin and consistency of the culture medium on the in vitro establishment of bamboo1

2019 ◽  
Vol 49 ◽  
Author(s):  
Daniela Werner Ribeiro dos Santos ◽  
Théo Piucco Rocker ◽  
Thiago Sanches Ornellas ◽  
Miguel Pedro Guerra
Keyword(s):  
Liquid Culture ◽  
Culture Medium ◽  
Liquid Culture Medium ◽  
Bambusa Vulgaris ◽  
Phyllostachys Bambusoides ◽  
In Vitro Establishment ◽  
Dendrocalamus Asper

ABSTRACT The contamination by microorganisms and oxidation of explants in the in vitro establishment of bamboo are recurrent problems for its micropropagation. In the present study, effects of the biocide Plant Preservative Mixture (PPM™), the antibiotic kasugamycin and the consistency of the culture medium were evaluated in the in vitro establishment of Bambusa vulgaris,Phyllostachys bambusoides and Dendrocalamus asper. The presence of PPM™ in the culture medium had a significant effect using 2 mL L-1 or 4 mL L-1 concentrations, as well as in the liquid culture medium, increasing the plants established in the autumn. Kasugamycin promoted variable responses for all the three species, depending on the season. There was interaction among the factors, demonstrating that higher rates of viable plants can be obtained by combining different strategies to reduce the oxidation and contamination. For the in vitro establishment of B. vulgaris,P. bambusoides and D. asper, it is recommended to add 2 mL L-1 or 4 mL L-1 of PPM™ to the liquid culture medium.

scholarly journals The creation of a Taraxacum kok-saghyz high frequency regeneration system

2021 ◽  
Vol 843 (1) ◽  
pp. 012041
Author(s):  
A A Verbitskaya ◽  
A S Ivanova ◽  
N G Konkova ◽  
A K Gaponenko
Keyword(s):  
Culture Medium ◽  
Ph Value ◽  
Culture Media ◽  
Shoot Formation ◽  
High Survival ◽  
Regeneration System ◽  
Hormone Exposure ◽  
Direct Shoot Formation ◽  
Root Tissues

Abstract The aim of this research was to study the morphogenetic ability of Taraxacum kok-saghyz root tissues and to optimize the culture medium for the subsequent genetic transformation of plants. The effects of exogenous hormone exposure on survival, in vitro shoot induction, and root formation were studied by using root tissues. For the cultivation the samples of kok-saghyz, the Murashige-Skuga nutrient medium was used as the basis, supplemented with sucrose 20 g/l, vitamins B5 1 mg/l, and also containing agar 5.5 g/l. The pH value is 5.7. For the plant regeneration induction, growth regulators, auxins and cytokinins were added in culture media. In this study, the roots of D 1 mm and two media variants were used for comparison: variant 1. MS + 6-BAP 1 mg/l; variant 2. MS + 6-BAP 1 mg/l + IAA 0.2 mg/l. An effective protocol for the regeneration of kok-saghyz explants was developed. There was a high percentage of regeneration of 87.6% on the medium containing a combination of cytokinin and auxin, as well as a high percentage of direct shoot formation, which was 65.1%, the degree of rooting was 100%, the resulting cultured plant tissues grew well and had a high survival rate after transplantation.

scholarly journals EFFECT OF 6- BENZYLAMINOPURINE AND THE CULTURE MEDIUM MS (1962) ON THE IN VITRO ESTABLISHMENT OF Prosopis pallida (WILLD.) KUNTH

REBIOL ◽  
2019 ◽  
Vol 39 (2) ◽  
pp. 30-40
Author(s):  
Diego Campos ◽  
Claudia Chávez ◽  
Segundo Lopéz ◽  
Armando Gil- Rivero ◽  
Angélica Lopéz -Zavaleta ◽  
...  
Keyword(s):  
Culture Medium ◽  
In Vitro Establishment

scholarly journals 97 ASSESSMENT OF VIABILITY OF IN VITRO PRODUCED BOVINE EMBRYOS FOLLOWING VITRIFICATION BY CVM OR SLOW FREEZING WITH ETHYLENE GLYCOL AND TRIPLE TRANSFER

2005 ◽  
Vol 17 (2) ◽  
pp. 199 ◽  
Author(s):  
B. Peachey ◽  
K. Hartwich ◽  
K. Cockrem ◽  
A. Marsh ◽  
A. Pugh ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Survival Rates ◽  
Slow Freezing ◽  
High Survival ◽  
Bovine Embryos ◽  
Embryo Survival ◽  
Frozen Embryos ◽  
Morula Stage ◽  
Fresh Embryos

Vitrification has become the method of choice for the preservation of in vitro derived embryos of a number of species, and several methods of vitrification have been developed. One such method, the cryoLogic vitrification method (CVM) yields high survival rates of warmed embryos (Lindemans W et al. 2004 Reprod. Fertil. Dev. 16, 174 abst). In this study, the post-warm viability of bovine IVP embryos following either vitrification using CVM or slow freezing using ethylene glycol (EG) was compared. In addition, the survival of embryos following triple transfer to synchronized recipients was measured and the embryo (“e”) and recipient (“r”) contributions to embryo survival was determined using the “er” model for embryo survival (McMillan WH et al. 1998 Theriogenology 50, 1053–1070). Bovine IVP methods were those of van Wagtendonk et al. 2004 Reprod. Fertil. Dev. 16, 214 (abst). On day 7 of culture (Day 0 = IVF), Grade 1 and 2 embryos that had reached at least the late morula stage were selected for vitrification (20% DMSO, 20% ethylene glycol) or freezing in 1.5 M ethylene glycol + 0.1 M sucrose (0.5°C/min to −35°C). Following storage in LN2 for at least 24 h the embryos were thawed, the cryoprotectant removed, and the embryos cultured for 72 h in mSOF medium under 5% CO2, 7% O2, 88% N2. The number of hatching embryos was recorded at 24-h intervals. In addition, blastocyst and expanded blastocyst embryos were thawed and immediately transferred nonsurgically to recipients (three embryos of the same grade to each recipient) on Day 7 of a synchronized cycle (Day 0 = heat). The recipients were ultrasound-scanned for the presence of, and number of, fetuses on Days 35 and 62, respectively. The invitro assessment of 148 CVM and 230 EG frozen embryos indicated that more vitrified than EG embryos hatched by 72 h (73% vs. 62%; CVM vs. EG, χ2 = 4.5, P < 0.05). Overall, more Grade 1 embryos hatched than Grade 2 (74% vs. 60%, χ2 = 7.2, P < 0.01). CVM embryos (105) were triple-transferred to 35 recipients, and EG embryos (30) were triple-transferred to 10 recipients. Recipient pregnancy rates at Day 62 were 80% and 70%, respectively. Overall embryo survival was 38.5% (41% for CVM and 30% for EG). The overall calculated “e” and “r” values were 0.39 and 1.0 (“e”: 0.42 and 1.0, and “r”: 0.31 and 1.0, respectively, CVM and EG groups). Survival rates of CVM embryos to Day 62 (41%) were slightly lower than that previously obtained for fresh embryos produced using an identical IVP procedure (44% – van Wagtendonk AM 2004).

Neonatal survival: an overview

1992 ◽  
Vol 15 ◽  
pp. 1-7 ◽  
Author(s):  
M. A. Varley
Keyword(s):  
Medical Profession ◽  
Survival Rates ◽  
Farm Animals ◽  
Physical Factors ◽  
High Survival ◽  
Animal Agriculture ◽  
Factors Affecting ◽  
Neonatal Deaths ◽  
Probability Of Survival ◽  
Use Of Resources

AbstractMortality in neonates has always represented significant economic wastage and slow progress has been made in the understanding of the factors influencing the probability of survival or death. There is also increasing pressure in the animal agriculture sphere to pursue improved welfare and in the situation where neonatal deaths are a high proportion of the liveborn offspring, then this becomes not only an economic concern but also a welfare issue. This paper highlights principal problems within the neonatal area in order to introduce the ensuing text dealing with specific technical challenges.The magnitude of loss for different species including humans is given and the factors affecting mortalities are discussed. The major components include: human factors, pathogenic agents, immunological factors, temperature and thermoregulation, nutrition, behaviour and physical factors.Although single factors are often ascribed as the cause of death, the reality is that there are usually multifactorial components involved which interact and contribute to the final mortality of the individual.The approach to the practical management of neonates varies widely between the different animal industries and the techniques deployed depend on relative economic values. In human health care every available resource is used to ensure very high survival rates because of the incalculable value of each individual delivered. With farm animals the use of resources is at a much lower level and survival rates are lower. It ought to be possible in animal agriculture to adopt some of the methods used in the medical profession to assess high risk situations and to divert resources appropriately.

Supplementation of culture medium with knockout serum replacement improves the survival of bovine secondary follicles when compared with other protein sources during in vitro culture

Zygote ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 32-36
Author(s):  
D.S. Gomes ◽  
L.B. Aragão ◽  
M.F. Lima Neto ◽  
P.A.A. Barroso ◽  
L.R.F.M. Paulino ◽  
...  
Keyword(s):  
Bovine Serum ◽  
Culture Medium ◽  
Survival Rates ◽  
Basal Membrane ◽  
Histological Evaluation ◽  
Serum Replacement ◽  
Before And After ◽  
Chi Squared ◽  
Knockout Serum Replacement

SummaryThe present study evaluated the effect of knockout serum replacement (KSR), fetal bovine serum (FBS) and bovine serum albumin (BSA) on the viability and growth of bovine secondary follicles cultured in vitro for 12 days. To this end, secondary follicles were isolated (185–202 μm) and cultured in vitro in TCM-199+ medium supplemented with KSR (5% and 10%), FBS (5% and 10%) or BSA (3 mg/ml) at 38.5°C with 5% CO2 in air. Follicular diameters were evaluated on days 0, 4, 8 and 12. After 12 days of culture, follicular survival analysis was performing by using calcein-AM and ethidium homodimer. Before and after culture, follicles were fixed in paraformaldehyde for histological evaluation. Follicular diameter at different days of culture were compared using the Kruskal–Wallis test, while the percentages of viable follicles were analyzed by chi-squared test (P < 0.05). Results showed that follicles cultured in the presence of KSR at both concentrations presented higher follicular survival rates than those cultured in control medium alone or supplemented with FBS or BSA. Conversely, the presence of KSR, BSA or FBS did not increase follicular diameter after 12 days of culture. Histology analysis showed that, among the tested treatments, follicles cultured in the presence of KSR had preserved rounded oocytes, juxtaposed granulosa cells and intact basal membrane. In conclusion, supplementation of culture medium with KSR increases the follicular survival of bovine secondary follicles cultured in vitro.

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