scholarly journals Larch regeneration (larix sibirica.ldb) from zygote embryos in in vitro and proliferation rate under growth hormone influence

2019 ◽  
Vol 26 (01) ◽  
pp. 108-116
Author(s):  
Tserendejid L ◽  
Enkhchimeg V

Larix sibirica Ledeb is a frost-hardy tree species (50-70 cm tall) which belong to genus of Larix, and family of Pinaceae Lindl. Our objective was to generate plantlets from zygote embryos of larch tree (Larix sibirica Ledeb) in in vitro condition. Convenient in vitro culture for Larix sibirica.Ldb for shoot formation was MSGm with 2 mg/L BAP, 1 mg/L 2.4-D g/L activated carbon. Root was formatted on MSGm with 1 mg/L BAP, 2 mg/L 2.4-D g/L activated carbon. Сибирь шинэс (larix sibirica ledeb)-ний бичил ургамлыг гаргах, бойжуулахад өсөлт in vitro орчинд идэвхжүүлэгчийн нөлөө Хураангуй Нарсны овгийн (Pinaceae Lindl), шинэс (Larix)-ний төрөлд багтах Сибирь шинэс (Larix sibirica  Ldb) нь 24-26 м дундаж өндөртэй 40 м хүртэл өндөр ургадаг модлог ургамал юм. Энэхүү  судалгааны ажлаар Сибирь шинэс (Larix sibirica.Ldb)-ний үр хөврөлөөс in vitro орчинд бичил  ургамлыг гаргаж, бойжуулахад өсөлт идэвхжүүлэгчийн нөлөөг тогтоосон. Сибирь шинэсний  үр хөврөлөөс нахиа үүсгэхэд 2 мг/л ВАР, 1 мг/л 2.4-D, 7 г/л идэвхжүүлсэн нүүрс агуулсан MSGm  тэжээлт орчинд 4 мм хэмжээтэй хөврөлийг өсгөвөрлөх нь хамгийн тохиромжтой. 2.4-D (2  мг/л) болон BAP(1 мг/л ) хослуулсан MSGm тэжээлт орчинд үндэс үүссэн. Сибирь шинэсний  бичил ургамлыг өсөлт идэвхжүүлэгчээр үйлчлэхэд үндэсний урт, хэлбэр сайжирч байгаа учир  шинэсний бичил ургамлыг өсөлт идэвхжүүлэгчийг ашиглах шаардлагатай. Түлхүүр үг: Үр хөврөл, MSGm тэжээлт орчин, AI үндсэн тэжээлт орчин 

2008 ◽  
Vol 75 (5) ◽  
pp. 715-722 ◽  
Author(s):  
Angela M. Murphy ◽  
Kieran G. Meade ◽  
Patricia A. Hayes ◽  
Stephen D.E. Park ◽  
Alex C.O. Evans ◽  
...  

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 560d-560
Author(s):  
Dennis P. Stimart ◽  
John C. Mather

Cotyledons from developing embryos 6 to 8 weeks old of Liatris spicata (blazing star) were cultured on Murashige-Skoog (MS) medium containing 0, 0.4, 4.4, and 44.4 μ M benzyladenine (BA) or 0, 0.2, 2.2, and 22.2 μ M thidiazuron (TDZ) to induce adventitious shoot formation. The highest percent of cotyledons forming shoots with highest shoot counts was on medium containing 2.2 μ M TDZ. Vitreous shoots formed on medium with 22.2 μ M TDZ. Callus derived from cotyledons and cultured on medium containing 4.44 μ M BA or 2.2 μ M TDZ formed adventitious shoots with highest shoot counts on 4.44 μ M BA. Adventitious shoots derived from cotyledons and callus were rooted on MS medium with 5.0 μ Mindole-3-butyric acid, acclimatized and grown ex vitro. All micropropagated plants appeared similar to each other.


HortScience ◽  
1996 ◽  
Vol 31 (1) ◽  
pp. 154-155
Author(s):  
Dennis P. Stimart ◽  
John C. Mather

Cotyledons from developing 6- to 8-week-old embryos of Liatris spicata (L.) Willd. (blazing star) were cultured on Murashige and Skoog medium containing 0, 0.4, 4.4, or 44.4 μm BA or 0, 0.2, 2.2, or 22.2 μm TDZ to induce adventitious shoot formation. The highest percentage of cotyledons forming the most shoots was on medium containing 2.2 μm TDZ. Cotyledon-derived callus cultured on medium containing 4.4 μm BA formed ≈16 times more adventitious shoots than on 2.2 μm TDZ. Adventitious shoots derived from cotyledons or callus produced roots when placed on MS medium containing 5.0 μm IBA. Regenerated plants that flowered in the field appeared homogeneous. Chemical names used: N6-benzyladenine (BA), thidiazuron (TDZ), indole-3-butyric acid (IBA).


HortScience ◽  
2003 ◽  
Vol 38 (1) ◽  
pp. 110-112 ◽  
Author(s):  
Guillermo Pratta ◽  
Lilians N. Cánepa ◽  
Roxana Zorzoli ◽  
Liliana A. Picardi

Estimates of genetic variability for in vitro culture traits among the genus Lycopersicon and evaluation of the gene effects involved in callus production and shoot formation were achieved. Five parents including wild and cultivated tomato genotypes and their nonreciprocal 10 possible hybrid combinations were assayed. The callus percentage (C = number of cultures that only produced callus× 100/total number of cultures), the regeneration percentage (R = number of cultures that differentiated into shoots or primordia × 100/total number of cultures) and the productivity rate (PR = total number of shoots/total number of cultures) of each genotype were calculated 45 days after culture initiation. Diallel analysis revealed genetic variability for in vitro culture response. Wild genotypes contributed to a reduction in callus production and an increase in shoot formation while the cultivated genotypes either had an opposite effect or did not modify the expression of culture traits. Hybrids had the lowest callus production and highest shoot formation percentage. Additive gene effects were mainly involved in the expression of C and R, while both additive and nonadditive gene effects were involved in expression of PR.


2018 ◽  
Vol 41 (5) ◽  
Author(s):  
Diego Pascoal Golle ◽  
Lia Rejane Silveira Reiniger ◽  
Charlene Moro Stefanel ◽  
Marlove Fátima Brião Muniz ◽  
Karol Buuron da Silva

ABSTRACT Eugenia involucrata DC. (Myrtaceae), an economically important forest tree species, is prized for its timber and fruits, and is also an important ornamental plant. This study aimed to evaluate the effect of Thidiazuron (TDZ) and α-Naphthaleneacetic acetic acid (NAA) on in vitro multiplication of nodal segments of E. involucrata. We tested the effect of the absence and presence of NAA (0.5 µM), combined with TDZ at concentrations of 0, 2, 4, 8, 16, or 32 µM, on the in vitro multiplication of E. involucrata. The use of TDZ combined with NAA (0.5 µM) favored the formation of shoots and buds in the explants, especially at 32 µM TDZ concentration. Intermediate concentrations of TDZ also promoted shoot formation but induced hyperhydricity in the explants. It is possible to induce organogenesis leading to the multiplication of E. involucrata nodal segments using TDZ, preferably combined with NAA.


2020 ◽  
Vol 14 (5) ◽  
pp. 632-638
Author(s):  
Zhongyong Cen ◽  
Jiang Su ◽  
Hongrun Tu ◽  
Shiting Lin

This study took the inflorescence and leaves of the succulent plant Haworthia heidelbergensis as explants, and explored the effects of different mediums with different hormone ratios on the rapid propagation of Haworthia heidelbergensis. The results showed that the optimal medium component for inflorescence callus induction was MS (Murashige and Skoog)+2.0 mg/L 6-BA+1.0 mg/L 2,4-D+0.2 mg/L NAA, the callus induction rate was 90%; the optimal medium component for leaf callus induction was MS+0.5 mg/L 6-BA+2.0 mg/L KT+0.3 mg/L NAA; the optimal medium for callus differentiation was MS+1.0 mg/L 6-BA+2.0 mg/L KT+0.3 mg/L NAA, the clump bud differentiation rate was 50%; the optimal medium for clump bud proliferation was MS+0.5 mg/L 6-BA+1.0 mg/L KT+0.05 mg/L NAA, the proliferation rate was 600%; the best medium for rooting was 1/2 MS+ 0.2 mg/L NAA+0.3 g/L AC. In conclusion, this study selected the explants and culture mediums, established an aseptic propagation system and provided a reference for the in vitro culture and rapid propagation of Haworthia heidelbergensis.


2018 ◽  
pp. 46-51

Propagación In Vitro de Platicerium andinum Baker a partir de esporas In vitro propagation of Platicerium andinum Baker from spores Astriht Ruiz Rios1, Geyden Díaz Montes2 y Astrid Domy Gutiérrez Ruiz2 1Universidad Nacional de San Martín - Tarapoto, Jr. Maynas N° 177 - Tarapoto 2Corporación G y G E.I.R.L., Jr. 02 de Mayo N° 340 - Moyobamba DOI: https://doi.org/10.33017/RevECIPeru2015.0007/ Resumen Los bosques del departamento de San Martin, hábitat de Platycerium andinum B. viene siendo destruido de manera desmesurada, ocasionado por actividades antropogénicas, como la extracción de madera, incendios forestales, migración y cambio de uso de la tierra, lo que ha conducido a la especie a que actualmente se encuentre en peligro de extinción, sumándose a ello la extracción de la especie por su exuberante belleza para su comercialización como planta ornamental, asimismo a que sus esporas son difíciles de germinar en condiciones naturales. Además, no se cuenta con una metodología para la propagación in vitro de esta especie. La presente investigación tiene como objetivos determinar la concentración adecuada de hipoclorito de sodio para la obtención de esporas de Platycerium andinum B. libre de patógenos para su óptima germinación y evaluar tres medios de cultivo para determinar el medio más adecuado para la propagación de los gametofitos a través de cultivo in vitro. Las esporas fueron obtenidas de frondas fértiles de plantas adultas de Platicerium andinum B. haciendo un raspado de estas. Previa exposición de las esporas a una temperatura de 30 °C por espacio de 12 horas en estufa, estas fueron desinfectadas en una jeringa de 20 ml. en la cámara de flujo laminar con hipoclorito de sodio a tres diferentes concentraciones (T1: 0.5%, T2: 1% y T3: 1.5 %) por un tiempo de 20 minutos y cuatro enjuagues con agua destilada estéril; obteniendo como mejor resultando con el tratamiento T3: (1.5 %). La germinación de las esporas fue evaluada a partir de los 10 días, tiempo en el cual comenzaron a germinar y a los 30 días ya se tenía abundante tejido gametofitico; se evaluó a través del Índice de Germinación de las esporas (IG) utilizando la escala de abundancia-cobertura de Braun-Blanquet (Mermoz y Martín, 1993 modificada por Ramírez et al., 2000) llegando a los 60 días a la escala 5 (Cualquier número de gametofitos con cobertura mayor de 75%). En cuanto a la determinación del  mejor medio de cultivo para la propagación in vitro de gametofitos se trabajó con tres medios MSB (T1, T2 y T3) con aditivos de 0.4 ml. de thiamina, 0.5 de ácido nicotínico, 2 gramos de carbón activado y 20 gramos de sacarosa; con 100 ml de agua de coco en T2, y 200 ml en T3, obteniéndose como mejor resultado al tratamiento T1: (M y S Basal, con adición de 0.4 ml. de thiamina, 0.5 de ácido nicotínico, 2 gramos de carbón activado y 20 gramos de sacarosa). Descriptores: Gametofito, haploide, esporas, cultivo in vitro. Abstract Forests department of San Martin, habitat of Platycerium andinum B. is being destroyed disproportionately, caused by anthropogenic activities such as logging, forest fires, migration and changing land use, which has led to the species to which is currently in danger of extinction, adding to it the extraction of the species for its lush beauty for marketing as ornamental plant, also to the spores are difficult to germinate under natural conditions. Also, we do not have a methodology for in vitro propagation of the species. This research aims to determine the appropriate concentration of sodium hypochlorite to obtain spores of Platycerium andinum B., free of pathogens for optimum germination and evaluate three culture media to determine the most suitable medium for the propagation of the gametophytes through in vitro culture. The spores were obtained from fertile fronds of adult plants of Platicerium andinum B. making a scraping of these. Prior exposure of spores at a temperature of 30 °C for 12 hours in an oven, these were disinfected in a 20 ml syringe. In laminar flow chamber with sodium hypochlorite at three different concentrations (T1: 0.5%, T2: T3 1%: 1.5%) for a time of 20 minutes and four rinses with sterile distilled water; obtaining as being better with the treatment T3 (1.5%). The spore germination was evaluated after 10 days, at which time began to germinate and after 30 days we had plenty gametophytic tissue; it was evaluated through the germination rate of the spores (IG) using the scale of abundance-coverage Braun-Blanquet (Mermoz and Martin, 1993 as amended by Ramirez et al., 2000) coming to 60 days through 5 scale (Any number of gametophytes more coverage 75%). As for determining the best medium for the in vitro propagation of gametophytes we worked with three media MSB (T1, T2 and T3) with additives of 0.4 ml. thiamine, 0.5 nicotinic acid, 2 grams of activated carbon and 20 g of sucrose; with 100 ml of coconut water in T2, and 200 ml in T3, obtaining as best result for T1 (M and S Basal, added 0.4 ml thiamine, 0.5 nicotinic acid, 2 grams of activated carbon and 20 grams of sucrose). Keywords: Gametophyte, haploid spores, in vitro culture.


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