scholarly journals Formamide deionized accelerates the somatic embryogenesis of Cunninghamia lanceolata

2021 ◽  
Vol 30 (3) ◽  
pp. e016-e016
Author(s):  
Shichan He ◽  
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Optimal Concentration ◽  
Cunninghamia Lanceolata ◽  
High Concentration ◽  
Concentration Gradients ◽  
Low Concentration ◽  
Forest Farm

Aim of the study: To improve the efficiency of the somatic embryogenesis (SE) in Cunninghamia lanceolata. Area of the study: The study was conducted at Nanjing Forestry University (Nanjing, China). Material and methods: Immature cones of C. lanceolata, genotype 01A1 which was planted in Yangkou State-owned Forest Farm (Fujian, China), were used to induced callus. These calli were used to induce SE, concentration gradients of 0 g/L, 0.01134 g/L, 0.1134 g/L, 1.1134 g/L and 11.34 g/L of FD was added, to explore the optimal concentration for promoting SE of C. lanceolata. Main results: Low concentration of FD promoted the maturation of somatic embryos, while high concentration of FD lead to browning of embryogenic callus. The seedling rate and rooting number of seedlings induced by different concentrations of FD were significantly different. Research highlights: This study may aid in the rapid maturation of C. lanceolata somatic embryos and is useful for accelerated C. lanceolata breeding.

scholarly journals Influence of Abscisic Acid and Sucrose on Somatic Embryogenesis in CactusCopiapoa tenuissimaRitt. formamostruosa

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
J. Lema-Rumińska ◽  
K. Goncerzewicz ◽  
M. Gabriel
Keyword(s):  
Somatic Embryogenesis ◽  
Abscisic Acid ◽  
Somatic Embryos ◽  
Sucrose Concentration ◽  
Turgor Pressure ◽  
Direct Somatic Embryogenesis ◽  
Fresh Weight ◽  
High Concentration ◽  
Globular Stage ◽  
Indirect Somatic Embryogenesis

Having produced the embryos of cactusCopiapoa tenuissimaRitt. formamonstruosaat the globular stage and callus, we investigated the effect of abscisic acid (ABA) in the following concentrations: 0, 0.1, 1, 10, and 100 μM on successive stages of direct (DSE) and indirect somatic embryogenesis (ISE). In the indirect somatic embryogenesis process we also investigated a combined effect of ABA (0, 0.1, 1 μM) and sucrose (1, 3, 5%). The results showed that a low concentration of ABA (0-1 μM) stimulates the elongation of embryos at the globular stage and the number of correct embryos in direct somatic embryogenesis, while a high ABA concentration (10–100 μM) results in growth inhibition and turgor pressure loss of somatic embryos. The indirect somatic embryogenesis study in this cactus suggests that lower ABA concentrations enhance the increase in calli fresh weight, while a high concentration of 10 μM ABA or more changes calli color and decreases its proliferation rate. However, in the case of indirect somatic embryogenesis, ABA had no effect on the number of somatic embryos and their maturation. Nevertheless, we found a positive effect of sucrose concentration for both the number of somatic embryos and the increase in calli fresh weight.

scholarly journals Induction of Somatic Embryogenesis in Vulnerable Medicinal Plant Hedychium spicatum Buch-Ham ex Smith

2014 ◽  
Vol 23 (2) ◽  
pp. 147-155 ◽  
Author(s):  
Dinesh Giri ◽  
Sushma Tamta
Keyword(s):  
Somatic Embryogenesis ◽  
Medicinal Plant ◽  
Somatic Embryos ◽  
Synthetic Seeds ◽  
Ex Situ ◽  
Secondary Embryogenesis ◽  
Zygotic Embryos ◽  
High Concentration ◽  
Cotyledon Explants ◽  
Short Period

This protocol has been developed for somatic embryogenesis in Hedychium spicatum. Simultaneously, a method has also been developed for the production of synthetic seeds by using somatic embryos. Direct somatic embryos were developed on cotyledon explants of zygotic embryos on MS supplemented with high concentration of NAA (20.0 µM). Induction of secondary embryogenesis was best in 2,4-D supplemented medium fortified with activated charcoal. Germination of somatic embryos was enhanced by using GA3. Besides this, round and semi-hard beads of somatic embryos (synthetic seeds) could be produced by using 2% Na-alginate and 100 mM calcium chloride and more than 30% germination of synthetic seeds was achieved in MS. Well acclimated plants produced via somatic embryogenesis and/or synthetic seeds were transferred to field where more than 60% survived. This simple study enabled us to obtain a number of plantlets throughout the year each cycle requiring a short period of time. Besides propagation, this study provided an ex situ method for conservation of this vulnerable Himalayan species.D. O. I.http://dx.doi.org/10.3329/ptcb.v23i2.17506Plant Tissue Cult. & Biotech. 23(2): 147-155, 2013  (December)

scholarly journals Plant Regeneration via Somatic Embryogenesis from Leaf and Floral Explants of ‘Chancellor’ Wine Grape

1970 ◽  
Vol 20 (2) ◽  
pp. 157-170 ◽  
Author(s):  
Richard M.S. Mulwa ◽  
Margaret M.A. Norton ◽  
Robert M. Skirvin
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Basal Medium ◽  
Limiting Factor ◽  
Half Strength ◽  
Conversion Stage ◽  
Cotyledon Expansion ◽  
Floral Explants ◽  
Shoot Meristems

Abundant embryogenic callus was obtained from leaf and floral explants of "Chancellor" grape by continuous culture for 12 weeks on Nitsch and Nitsch basal medium supplemented with 9 μM 2, 4-D + 17 μM IASP + either 1 μM BA or 1 μM TDZ (ECIM) in darkness. They were successfully maintained by a five to six week subculture interval on NN medium containing 2 μM 2, 4-D + 0.2 μM TDZ + 4 μM IASP (LTMM). Near synchronous embryo developed from embryogenic callus on medium containing 10 μM IASP + 8 μM NOA + 1 μM TDZ + 1 μM ABA + 2.5 g/l AC (EDMM).  Individually separated somatic embryos were germinated on both NN and half strength of MS containing 0.5 μM BA + 0.025 μM NAA, respectively; normal plantlet conversion from embryos was low (35%).  Whole fruiting plants were obtained. Aberrant embryo development was characterized by failure to form functional shoot meristems following the initial cotyledon expansion during germination. These observations indicate that the embryo conversion stage of the regeneration is difficult and remains a limiting factor requiring more empirical experimentation for improvement in grape tissue culture.   Key words: Chancellor grape, Regeneration, Somatic embryogenesis   D.O.I. 10.3329/ptcb.v20i2.6895   Plant Tissue Cult. & Biotech. 20(2): 157-170, 2010 (December)

scholarly journals EFFECT OF DIFFERENT SOURCES OF PLANT GROWTH REGULATOR ON THE INDUCTION AND DEVELOPMENT OF MANGOSTEEN SOMATIC EMBRYOS

2017 ◽  
Vol 17 (1) ◽  
pp. 9
Author(s):  
Yosi Zendra Joni ◽  
Riry Prihatini ◽  
Darda Efendi ◽  
Ika Roostika
Keyword(s):  
Somatic Embryogenesis ◽  
Plant Growth ◽  
Embryogenic Callus ◽  
Plant Growth Regulator ◽  
Somatic Embryos ◽  
Casein Hydrolysate ◽  
Malt Extract ◽  
Mass Propagation ◽  
Embryogenic Callus Induction

<p>Somatic embryogenesis is a technique for regenerating embryos derived from somatic cells of various plant species. This technique along with the utilization of plant growth regulator (PGR) might benefit for mass propagation and improvement of plant species through biotechnological tools. The study aimed to determine the effect of different plant growth regu-lators, namely 6-benzyladenine (BA) and thidiazuron (TDZ) on the embryogenic callus induction as well as casein hydrolysate and malt extract on the somatic embryo development of mangosteen. The explants used were in vitro young stems of mangosteen clone Leuwiliang. This study consisted of two experiments, namely induction of embryogenic callus and formation of somatic embryo. The first experiment was arranged as factorial in a completely randomized design with BA (0 and 0.7 mg l-1) as the first factor and TDZ (0, 0.1, 0.5 and 1.0 mg l-1) as the second factor. The second experiment consisted of four treatments, i.e. casein hydrolysate and malt extract at the rate of 500 and 1,000 mg l-1. The results showed that the best medium for embryogenic callus induction was MS supplemented with 0.1 mg l-1 TDZ, which resulted semifriable calli. Casein hydrolysate and malt extract could not induce the formation of somatic embryos. After two times subcultures on the same MS medium supplemented with 0.5 mg l-1 TDZ and 0.7 mg l-1 BA, a total of 33.8 somatic embryos per explant was induced. The successful somatic embryogenesis would support mangosteen breeding and in vitro mass propagation program.</p>

scholarly journals Can Ethylene Inhibitors Enhance the Success of Olive Somatic Embryogenesis?

Plants ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 168
Author(s):  
Muhammad Ajmal Bashir ◽  
Cristian Silvestri ◽  
Amelia Salimonti ◽  
Eddo Rugini ◽  
Valerio Cristofori ◽  
...  
Keyword(s):  
Somatic Embryogenesis ◽  
Salicylic Acid ◽  
Silver Nitrate ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Cobalt Chloride ◽  
Zygotic Embryos ◽  
Ethylene Inhibitors ◽  
Embryogenic Calli ◽  
Stimulatory Action

An efficient in vitro morphogenesis, specifically through somatic embryogenesis, is considered to be a crucial step for the application of modern biotechnological tools for genetic improvement in olive (Olea europaea L.). The effects of different ethylene inhibitors, i.e., cobalt chloride (CoCl2), salicylic acid (SA), and silver nitrate (AgNO3), were reported in the cyclic somatic embryogenesis of olive. Embryogenic callus derived from the olive immature zygotic embryos of the cultivar Leccino, was transferred to the expression ECO medium, supplemented with the ethylene inhibitors at 20 and 40 µM concentrations. Among these, the maximum number of somatic embryos (18.6) was obtained in media containing silver nitrate (40 µM), followed by cobalt chloride (12.2 somatic embryos @ 40 µM) and salicylic acid (40 µM), which produced 8.5 somatic embryos. These compounds interfered on callus traits: white friable embryogenic calli were formed in a medium supplemented with 40 µM cobalt chloride and salicylic acid; in addition, a yellow-compact embryogenic callus appeared at 20 µM of all the tested ethylene inhibitors. The resulting stimulatory action of silver nitrate among all the tested ethylene inhibitors on somatic embryogenesis, clearly demonstrates that our approach can efficiently contribute to the improvement of the current SE protocols for olive.

scholarly journals Bioproduction of Diosgenin in Callus Cultures of Balanites aegyptiaca: Effect of Growth Regulators, Explants and Somatic Embryogenesis

2006 ◽  
Vol 1 (3) ◽  
pp. 1934578X0600100
Author(s):  
Bishnu P. Chapagain ◽  
Vinod Saharan ◽  
Dan Pelah ◽  
Ram C. Yadav ◽  
Zeev Wiesman
Keyword(s):  
Somatic Embryogenesis ◽  
Growth Regulators ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Callus Formation ◽  
Basal Medium ◽  
Callus Cultures ◽  
Suspension Cultures ◽  
Balanites Aegyptiaca ◽  
Basal Media

This study describes the effects of plant growth regulators, explants, and somatic embryogenesis on in vitro production of the steroidal sapogenin, diosgenin, in callus cultures of the Balanites aegyptiaca (L.) Del.(desert date). Root, shoot, hypocotyl, and epicotyl callus culture of B. aegyptiaca, were raised on MS basal media supplemented with various combinations of either 2,4-D and NAA alone, or with BAP. The diosgenin content (on a dry weight basis) was found to be highest when calli were cultured in MS basal medium supplemented with 1.0 mg l−1 2,4-D alone and/or in combination with 0.5 mg l−1 BAP. However, the callus growth was highest in media supplemented with 2.5 or 3.0 mg l−1 2,4-D. MS basal media supplemented with 2,4-D 2.5 mg l−1 alone and in combination with 0.5 mg l−1 BAP induced pre-embryogenic callus formation on root cultures. When these pre-embryogenic callus cultures were used to establish cell suspension cultures, two growth densities were obtained in embryogenic suspension cultures, inducing clusters of somatic embryos at various stages of development. The maximum number of somatic embryos were obtained at the fifth week on the medium supplemented with 1.0 mg l−1 2,4-D. However, the diosgenin content in these somatic cells was found to be lower compared to the explant calluses. This study revealed that production of diosgenin in callus cultures of B. aegyptiaca is possible, but the amount is significantly affected by the growth regulators, type of explants, and somatic embryogenesis.

scholarly journals The evaluation of java fine flavor cocoa propagation through somatic embryogenesis technique for germplasm preservation

2021 ◽  
Vol 306 ◽  
pp. 01056
Author(s):  
Sulistyani Pancaningtyas
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Callus Formation ◽  
Basic Structure ◽  
Embryonic Cells ◽  
Regeneration Rate ◽  
Germplasm Preservation ◽  
Embryogenic Callus Formation ◽  
Secondary Somatic Embryos

Somatic embryogenesis is one of the newest technology that applied for the mass production of cocoa. This research aims to evaluate the regeneration rate of somatic embryos through somatic embryogenesis propagation techniques on java fine flavor cocoa. Cultivars in this study are ICCRI 01, ICCRI 02, DR 1, DR 2, DRC 16, DR 38, PNT 16, and PNT 30. Observations include parameters to determine the percentage of primary callus and embryogenic callus formation and the number of somatic embryos produced. Based on data, the ability of callus to produce primary embryos is highly dependent on plant cultivars and explant sources. Five cultivars showed a higher regeneration rate using explants from the petal part, while the rest showed a higher regeneration rate using explants from the staminode section. Embryogenic callus from each cacao cultivar has the same basic structure: a nodular friable structure consisting of many embryonic cells. Some fine flavor cacao cultivars that were able to produce callus and primary somatic embryos could not produce secondary somatic embryos and plantlets. However, two cultivars, which had low potential in producing primary embryos, had the high ability to produce secondary somatic embryos and develop into plantlets.

scholarly journals Morpho-histological development of the somatic embryos of Typha domingensis

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5952 ◽  
Author(s):  
Guadalupe Hernández-Piedra ◽  
Violeta Ruiz-Carrera ◽  
Alberto J. Sánchez ◽  
Arlette Hernández-Franyutti ◽  
Alfonso Azpeitia-Morales
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Typha Domingensis ◽  
Light Conditions ◽  
Maturation Phase ◽  
Auxin Concentration ◽  
Embryogenic Line ◽  
Dark Conditions ◽  
Embryogenic Lines

Background Sustainable methods of propagation of Typha domingensis through somatic embryogenesis can help mitigate its current condition of ecological marginalization and overexploitation. This study examined whether differentiation up to coleoptilar embryos could be obtained in an embryogenic line proliferated with light and high auxin concentration. Methods Murashige and Skoog medium at half ionic strength and containing 3% sucrose and 0.1% ascorbic acid was used for the three embryogenic phases. Induction started with aseptic 9-day-old germinated seeds cultured in 0.5 mg L−1 2,4-dichlorophenoxyacetic (2,4-D). Proliferation of the embryogenic callus was evaluated at 2,4-D concentrations ranging from 0 to 2 mg L−1 in cultures maintained in the dark. The dominant embryogenic products obtained in each treatment were used as embryogenic lines in the third phase. Thus, maturation of the somatic embryos (SEs) was analyzed using four embryogenic lines and under light vs. dark conditions. Embryogenic differentiation was also monitored histologically. Results Proliferation of the nine morphogenetic products was greater in the presence of 2,4-D, regardless of the concentration, than in the absence of auxin. Among the products, a yellow callus was invariably associated with the presence of an oblong SE and suspended cells in the 2,4-D treatments, and a brown callus with scutellar somatic embryos (scSEs) in the treatment without 2,4-D. During the maturation phase, especially the embryogenic line but also the light condition resulted in significant differences, with the highest averages of the nine morphogenetic products obtained under light conditions and the maximum concentration of auxin (YC3 embryogenic line). Only this line achieved scSE growth, under both light and dark conditions. Structurally complete coleoptilar somatic embryos (colSEs) could be anatomically confirmed only during the maturation phase. Discussion In the embryogenic line cultured with the highest auxin concentration, light exposure favored the transdifferentiation from embryogenic callus to scSE or colSE, although growth was asynchronous with respect to the three embryogenic phases. The differentiation and cellular organization of the embryos were compatible with all stages of embryogenic development in other monocotyledons. The growth of colSEs under light conditions in the YC3 embryogenic line and the structurally complete anatomic description of colSEs demonstrated that differentiation up to coleoptilar embryos could be obtained. The diversity of embryogenic products obtained in the YC3 embryogenic line opens up the opportunity to synchronize histological descriptions with the molecules associated with the somatic embryogenesis of Typha spp.

scholarly journals Partial Organogenesis and Somatic Embryogenesis from Petiole Explants of Field-grown Papaya (Carica papaya L.)

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 629g-630 ◽  
Author(s):  
S. Jayasankar ◽  
U.L Yadava
Keyword(s):  
Somatic Embryogenesis ◽  
Embryogenic Callus ◽  
Somatic Embryos ◽  
Carica Papaya ◽  
Vascular Tissue ◽  
The Other ◽  
Ms Medium ◽  
Free Medium ◽  
Petiole Explants ◽  
Young Leaves

Petiole discs from young leaves of female papaya (L-45) plants were cultured in MS or B5-based media containing 0, 2.25, 4.5, 11.25, and 22.5 μm 2,4-D. Compact embryogenic callus emerged from vascular tissue of petiole discs in about 3 weeks. In MS medium, 66% and 51% explants formed embryogenic callus with 11.25 and 22.5 μm 2,4-D, respectively. On the other hand, 79% explants formed embryogenic callus in B5-based medium with 4.50 μm 2,4-D. However, explants became necrotic in B5-based medium with 22.5 μm 2,4-D. Subculturing callus in auxin-free medium resulted in the development of roots or somatic embryos. Microscopic observations revealed that the roots were produced only by the callus that had retained its continuity with the vascular tissue. This investigation revealed that petioles from field grown papaya plants are potential explants for somatic embryogenesis and 2-week exposure to 2,4-D is adequate for inducing morphogenesis. Additionally, an interaction between 2,4-D and the components in the MS and B5-based media was observed.

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