scholarly journals An Optimized Micropropagation Protocol by Ex Vitro Rooting of Pear Rootstock OHF 333 (Pyrus communis L.)

2021 ◽  
Vol 74 ◽  
Author(s):  
Nataliya Dimitrova ◽  
Lilyana Nacheva
Keyword(s):  
Survival Rate ◽  
Plant Growth ◽  
Root Length ◽  
Pyrus Communis ◽  
Ex Vitro Rooting ◽  
Naphthaleneacetic Acid ◽  
Moderate Degree ◽  
Ex Vitro ◽  
Number Of Leaves

Abstract Pear rootstock OHF 333 ( Pyrus communis L.), which is included in the US ‘Old Home’ × ‘Farmingdale’ series, is characterized by good compatibility with most other varieties, high yields, and a moderate degree of resistance to fire blight. Micropropagation in vitro has shown promise for rapid, large-scale cloning of disease-free plant material throughout the year. However, pear shoots are often recalcitrant to rooting, and this process is highly genotype-dependent. This study aimed to improve the micropropagation protocol by ex vitro rooting of pear rootstock OHF 333 ( Pyrus communis L. ‘Old Home’ × ‘Farmingdale’). Charkor, a new plant growth regulator of natural origin was used, which contains metabolism products of symbiotic fungus-endophytes of ginseng roots, as an alternative to synthetically produced plant growth regulators (PGRs). Microcuttings were obtained from in vitro cultured shoots and subjected to four different treatments for ex vitro rooting: 1 g L −1 1-naphthaleneacetic acid (NAA) (as a powder), 0.5 mL L −1 Charkor for 3 hr or 6 hr, or the same concentration of Charkor prepared as a powder. Microshoots dipped in sterile distilled water with no additional hormonal treatments served as controls. Cultures were kept in a growth chamber under a 16-hr photoperiod, with air humidity maintained close to 100% (above 96%) for 2 weeks and then gradually reduced to 60%. Data on final acclimatization rate (survival rate; %), mean number of roots per plant, stem and root length, mean number of leaves per plant, and final acclimatization rate were collected 90 days after transplanting to ex vitro conditions. All treatments induced a successful acclimatization rate of more than 31%. The highest survival rate (86%) and longest stems were achieved by treatment with 0.5 mL L −1 Charkor for 6 hr. The greatest mean number of roots per plant, root length, and number of leaves was achieved in the variant treated with 1 g L −1 powdered NAA.

scholarly journals Salinity-Induced Alterations in the Growth, Membranes and Osmolytes of Musa spp. cv. Caipira (AAA) During Micropropagation

2019 ◽  
Vol 11 (6) ◽  
pp. 171
Author(s):  
Yuri Lima Melo ◽  
Isabele Aragão Gomes Trindade ◽  
Monique Cristina Simão Lopes ◽  
Cibelley Vanúcia Santana Dantas ◽  
Josemir Moura Maia ◽  
...  
Keyword(s):  
Survival Rate ◽  
Plant Height ◽  
Exposure Time ◽  
Root Length ◽  
Growth Traits ◽  
In Vitro Rooting ◽  
Ms Medium ◽  
Musa Spp ◽  
Number Of Leaves

The aim of this study was to determine the concentration and exposure time to NaCl suitable for the micropropagation of banana, through the analysis of growth traits. Banana propagules were inoculated in MS medium with different concentrations of NaCl (0; 50; 75 and 100 mM) for 120 days (multiplication and rooting, 60 days each), with monthly subcultures. These propagules were measured for plant height, number of leaves, sprouting rate, average number of formed propagules, rooting rate, root length and survival rate. After 30 days, NaCl reduced sprouting rate at multiplication; the number of leaves, rooting rate and root length in rooting; and the height and propagules number in both phases. After 60 days, the NaCl affected the sprouting rate and propagules number in the multiplication; length of root in rooting; and the height and number of leaves in both phases. After 120 days, the reduction in the survival rate was proportional to the increase of NaCl in the medium. Thus, it is concluded that NaCl reduces most of the growth traits and the treatments with 75 and 100 mM NaCl affected multiplication and in vitro rooting more intensely.

scholarly journals Effects of Growth Regulators and Gelling Agents on Ex Vitro Rooting of Raspberry

Plants ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 3 ◽  
Author(s):  
Vadim Lebedev ◽  
Mikhail Arkaev ◽  
Mariya Dremova ◽  
Ivan Pozdniakov ◽  
Konstantin Shestibratov
Keyword(s):  
Plant Growth ◽  
Growth Regulators ◽  
Survival Rates ◽  
Ex Vitro Rooting ◽  
Rubus Idaeus ◽  
Multiplication Rate ◽  
Ex Vitro ◽  
Gelling Agents ◽  
The Cost

Successful acclimatization and ex vitro rooting are among the key factors reducing the cost of micropropagated plants. We compared the survival of seven Russian cultivars of raspberry (Rubus idaeus) after rooting in vitro and ex vitro. Rooted shoots adapted to nonsterile conditions much better than nonrooted ones, with survival rates of 81%–98% versus 43%–76%, respectively. We studied the effects of different combinations of plant-growth regulators and gelling agents added to a proliferation medium on ex vitro rooting of primocane-fruiting raspberry cultivar “Atlant”. Reducing the agar concentration from 8 to 6.5 g/L increased the multiplication rate, but caused shoot hyperhydricity. The highest survival rate (97.2%) was observed for shoots grown in a medium containing 0.2 and 0.1 mg/L IBA, and gelled with 5 g/L agar and 0.2 g/L Phytagel. The microshoot height at the multiplication stage did not correlate with the plant growth during acclimatization. The obtained results can be used in the commercial micropropagation of the raspberry.

scholarly journals Micropropagation of arrow cane, Gynerium sagittatum (Aubl.) P. Beauv. cv. Criolla, Criolla 1, and Martinera, in a double-phase medium

2021 ◽  
Vol 22 (2) ◽  
Author(s):  
Claudia Marcela Lopez Diaz ◽  
Isidro Elías Suárez Padrón ◽  
Alicia Humanez Alvarez
Keyword(s):  
Root Length ◽  
Shoot Multiplication ◽  
Adventitious Root Formation ◽  
Naphthaleneacetic Acid ◽  
Ex Vitro ◽  
Design Data ◽  
Semisolid Medium ◽  
Double Phase ◽  
Phase Medium

To evaluate the micropropagation response of arrow cane, Gynerium sagittatum (Aubl.), plants using a double-phase medium in the multiplication stage, explants consisting of stem sections with axillary meristems from cultivars Criolla, Criolla 1, and Martinera were established in vitro in a semisolid medium. Then, they were multiplied using a double-phase medium supplied at several Benzylaminopurine (BAP) concentrations (0.0, 0.5, 1.0, 1.5, and 2.0 mg/L), followed by rooting in a culture medium supplied at several Naphthaleneacetic acid (NAA) concentrations (0.0, 0.5, 1.0, 1.5, and 20 mg/L). Both multiplied unrooted and rooted microshoots were transferred ex vitro. Treatments were distributed with a completely randomized design; data were analyzed with an ANOVA and means separated with Tukey’s test. Explants from Criolla and Martinera cultured with 0.5 mg/L BAP resulted in higher multiplication rates. All microshoots transferred to the rooting medium rooted, although NAA significantly increased the number of roots and reduced root length. Plants from all three cultivars, in vitro rooted or unrooted transferred to ex vitro conditions, showed 100 % survival and adaptation. For Criolla and Martinera, 0.5 mg/L BAP statistically increased shoot multiplication rates and NAA increased adventitious root formation and reduced root length. Plants of all cultivars survived and adapted 100 % to ex vitro conditions.

scholarly journals Propagation of Drosera rotundifolia and Drosera capensis in an in vitro Culture System

2017 ◽  
Vol 74 (2) ◽  
pp. 144
Author(s):  
Ileana MICLEA ◽  
Marius ZĂHAN
Keyword(s):  
Plant Growth ◽  
Root Development ◽  
Growth Regulator ◽  
Root Length ◽  
Shoot Development ◽  
Naphthaleneacetic Acid ◽  
Drosera Rotundifolia ◽  
Half Strength ◽  
Plant Characteristics

Drosera rotundifolia and Drosera capensis (Droseraceae) are carnivorous plants grown as ornamentals and sources for homeopathic medicine. The aim of this study was to optimize nutrient and growth regulator concentrations for the in vitro propagation of these species. Half strength MS medium (1/2MS) was supplemented with kinetin (0.5, 2, 5 mg/l) or 6-benzyladenine (3, 5 mg/l) and plantlets were transferred to 1/2MS with or without cytokinins. After 8 weeks rosette diameter, plant height, number of roots, root length were recorded and plants were cultured in full strength MS, 1/2MS or 1/2MS with 0.5 mg/l α-naphthaleneacetic acid for the same period of time. Afterwards, plant characteristics (number of roots, root length, number of shoots, number of flower stalks) were assessed. For D. rotundifolia, shoot development and rosette diameter increased significantly in the medium with 0.5 mg/l kinetin and 3 mg/l 6-benzyladenine, while root development decreased. Plant growth regulator free medium was more suitable for root development than medium with α-naphthaleneacetic acid and thus supported the formation of significantly more flower stalks. For D. capensis, kinetin was detrimental for shoot development, the optimum medium for both shoot and root formation being MS without plant growth regulators.

scholarly journals Propagation of Dyckia vicentensis, an endemic bromeliad of the Pampa biome, Brazil

Rodriguésia ◽  
2018 ◽  
Vol 69 (4) ◽  
pp. 2229-2235
Author(s):  
Rejane Flores ◽  
Letícia Cezar Kraetzig ◽  
Paola Zuquetto Flôres ◽  
Diuliana Nadalon Pereira ◽  
Henrique Mallmann Büneker ◽  
...  
Keyword(s):  
Survival Rate ◽  
Economic Value ◽  
Rio Grande ◽  
In Vitro Germination ◽  
Rio Grande Do Sul ◽  
Ex Vitro ◽  
Pampa Biome ◽  
Murashige And Skoog Medium ◽  
Number Of Leaves

Abstract Dyckia vicentensis is an endemic species of the southwestern region of Rio Grande do Sul (RS, Brazil), which presents high ornamental and economic value. Thus, the aim of this study was to test in vitro and ex vitro conditions for its propagation. For in vitro germination, disinfested seeds were inoculated on Murashige and Skoog medium with different salt concentrations and containing or not active charcoal. The ex vitro emergence of the seeds was evaluated using different compositions of substrates. Results showed that the propagation of D. vicentensis could be successfully performed in vitro on medium with 50% salt concentration or ex vitro using commercial substrate. The seedlings showed good adaptation during acclimatization in a greenhouse, although the in vitro germinated plants presented higher survival rate, number of leaves, and biomass in relation to those grown in ex vitro substrate. This is the first study carried out on the propagation of D. vicentensis, which may be used to subsidize its propagation and conservation.

scholarly journals Improved Rooting and Acclimatization of Micropropagated Hazelnut Shoots

HortScience ◽  
2004 ◽  
Vol 39 (7) ◽  
pp. 1688-1690 ◽  
Author(s):  
Mehmet Nuri Nas ◽  
Paul E. Read
Keyword(s):  
Survival Rate ◽  
Plant Growth ◽  
Butyric Acid ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Root Induction ◽  
Ex Vitro ◽  
Potential Use ◽  
Commercial Micropropagation

Microshoots of four hazelnut genotypes grown in vitro on Nas and Read medium (NRM) containing various combinations of CuSO4 • 5H2O and myo-inositol were successfully rooted and acclimatized ex vitro without any need of in vitro hardening treatments. Dipping of shoot bases in 1000 ppm indole-3-butyric acid (IBA) solution for 5 or 10 seconds followed by placement of shoots in plant growth regulator free NRM gave rise to formation of roots as early as 8 days. Shoots treated for 5 and 10 seconds rooted similarly, and depending on genotype, 88% to 98% rooting was observed within 15 days after treatment with IBA. Ex vitro survival of shoots three months after in vitro-root induction was 73% when shoots were treated with IBA for 5 seconds and 66% when shoots were treated for 10 seconds. The highest ex vitro survival rate (97%) 3 months after root induction was observed when shoots were treated with IBA solution for 10 seconds, and then cultured directly in peat pellets. Shoots developed good roots, and grew up to 70 cm in height 3 months after root induction. The potential use of rooting and acclimatization protocol for commercial micropropagation of hazelnut is presented.

scholarly journals Alterations in Microrhizome Induction, Shoot Multiplication and Rooting of Ginger (Zingiber officinale Roscoe) var. Bentong with Regards to Sucrose and Plant Growth Regulators Application

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 320
Author(s):  
Nisar Ahmad Zahid ◽  
Hawa Z.E. Jaafar ◽  
Mansor Hakiman
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Zingiber Officinale ◽  
Naphthaleneacetic Acid ◽  
Ms Medium ◽  
Zingiber Officinale Roscoe ◽  
Planting Materials ◽  
Disease Free

Ginger (Zingiber officinale Roscoe) var. Bentong is a monocotyledon plant that belongs to the Zingiberaceae family. Bentong ginger is the most popular cultivar of ginger in Malaysia, which is conventionally propagated by its rhizome. As its rhizomes are the economic part of the plant, the allocation of a large amount of rhizomes as planting materials increases agricultural input cost. Simultaneously, the rhizomes’ availability as planting materials is restricted due to the high demand for fresh rhizomes in the market. Moreover, ginger propagation using its rhizome is accompanied by several types of soil-borne diseases. Plant tissue culture techniques have been applied to produce disease-free planting materials of ginger to overcome these problems. Hence, the in vitro-induced microrhizomes are considered as alternative disease-free planting materials for ginger cultivation. On the other hand, Bentong ginger has not been studied for its microrhizome induction. Therefore, this study was conducted to optimize sucrose and plant growth regulators (PGRs) for its microrhizome induction. Microrhizomes were successfully induced in Murashige and Skoog (MS) medium supplemented with a high sucrose concentration (>45 g L−1). In addition, zeatin at 5–10 µM was found more effective for microrhizome induction than 6-benzylaminopurine (BAP) at a similar concentration. The addition of 7.5 µM 1-naphthaleneacetic acid (NAA) further enhanced microrhizome formation and reduced sucrose’s required dose that needs to be supplied for efficient microrhizome formation. MS medium supplemented with 60 g L−1 sucrose, 10 µM zeatin and 7.5 µM NAA was the optimum combination for the microrhizome induction of Bentong ginger. The in vitro-induced microrhizomes sprouted indoors in moist sand and all the sprouted microrhizomes were successfully established in field conditions. In conclusion, in vitro microrhizomes can be used as disease-free planting materials for the commercial cultivation of Bentong ginger.

scholarly journals Effects of Sucrose and Other Additives on In Vitro Growth and Development of Purple Coneflower (Echinacea purpurea L.)

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Dahanayake Nilanthi ◽  
Yue-Sheng Yang
Keyword(s):  
Plant Growth ◽  
Culture Medium ◽  
Respiratory Infections ◽  
Shoot Multiplication ◽  
Echinacea Purpurea ◽  
Naphthaleneacetic Acid ◽  
Acid Plant ◽  
Purple Coneflower ◽  
Upper Respiratory

Echinacea purpurea (purple coneflower) is being used for the preparation of more than 240 extracts, salves, and tinctures to help cure diseases like rabies, cold, and upper respiratory infections. Hence, efforts were made to develop a culture medium for successful in vitro culturing of cornflower and to regenerate buds and induce roots to enable mass propagation of selected clones. Of the three levels of sucrose tested as a supplement to MS media (Murashige and Skoog’s medium, 1962) 3% showed better rooting of buds and appeared morphologically normal and identical as compared to those grown at higher and lower concentrations (2 and 4%). The additives hydrolyzed lactabumin (0.0, 100, 300, and 900 mgL−1), peptone (0.0, 100, 300, and 900 mgL−1), and yeast (0.0, 100, 300, and 900 mgL−1) to media containing 0.3 mgL−1 BA (6-benzyladenine) and 0.01 mgL−1 NAA (naphthaleneacetic acid-plant growth regulators) has negatively influenced proliferation of shoots. The higher concentrations of the above have delayed the development of plantlets. Shoot multiplication was enhanced by coconut water with 2% being the best among 4 and 8% tested. Shoot organogenesis was not influenced by copper sulphate (0, 1.5, 3, 6, and 12 mgL−1) and silver nitrate (0.0, 0.5, 2.5, and 12.5 mgL−1) supplements and at higher concentrations of the above inhibited plant growth.

Subsitusi Fitohormon Dengan Air Kelapa (Cocos nucifera L.) pada Medium Vacin and Went Terhadap Pertumbuhan Eksplan Anggrek Dendrobium sp Secara in Vitro

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Wulan Dari Neng Gumiwang ◽  
Tintrim Rahayu ◽  
Ari Hayati
Keyword(s):  
Root Length ◽  
Cocos Nucifera ◽  
Water Concentration ◽  
Coconut Water ◽  
Culture Bottle ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Cocos Nucifera L

The purpose of this research is to determine the concentration of young coconut water that is appropriate for the growth of orchid plantlets (Dendrobium sp.) In vitro. This study used an experimental method, descriptive data analysis to compare several different concentrations of coconut water. The design of this study uses a completely randomized design (CRD). The treatments consist of 0% coconut water concentration (as a control), 15%, 30% and 60%. Each concentration was carried out 5 replications and each repetition consisted of 5 Dendrobium sp plantlets in each culture bottle conducted for 40 HST, for observing the root length carried out for 50 HST. The highest number of shoots and leaves were produced at the same concentration, namely 150 ml / L coconut water treatment (15% concentration) with an average of 2.8 shoots and the average number of leaves 10.8 leaves. The average number of roots and the longest root length was produced at a concentration of 600 ml / L coconut water (60% concentration) with an average of 6 roots, and the longest root length was 0.5 cm.Keywords: Young coconut water, (Cocos nucifera L.), Dendrobium sp., in vitro, growth.ABSTRAKTujuan penelitian ini ialah menentukan konsentrasi air kelapa muda yang tepat untuk pertumbuhan planlet anggrek (Dendrobium sp.) secara in vitro. Penelitian ini menggunakan metode eksperimen, analisis data secara deskriptif untuk membandingan beberapa konsentrasi air kelapa yang berbeda. Rancangan penelitian ini menggunakan Rancangan Acak Lengkap (RAL). Perlakukan terdiri dari konsentrasi air kelapa 0 % (sebagai kontrol), 15% , 30% dan 60%. Masing-masing konsentrasi dilakukan 5 kali ulangan dan setiap ulangan terdiri dari 5 planlet Dendrobium sp dalam setiap botol kultur yang dilakukan selama 40 HST, untuk pengamatan panjang akar dilakukan selama 50 HST. Jumlah tunas dan jumlah daun terbanyak dihasilkan pada konsentrasi yang sama, yaitu perlakuan air kelapa 150 ml/L (konsentrasi 15%)  dengan rata-rata jumlah tunas terbanyak 2,8 tunas dan rata-rata jumlah daun terbanyak 10,8 helai daun. Rata-rata jumlah akar terbanyak dan panjang akar terpanjang dihasilkan pada konsentrasi air kelapa 600 ml/L (Konsentrasi 60%) dengan rata-rata jumlah akar terbanyak sebanyak 6 akar, dan rata-rata panjang akar terpanjang 0,5 cm.Kata kunci : Air kelapa Muda (Cocos nucifera L.), Dendrobium sp., in vitro, pertumbuhan 

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