scholarly journals The elaboration of a practical protocol for the micropropagation of several apple rootstock varieties

2016 ◽  
Vol 73 (2) ◽  
pp. 226
Author(s):  
Doina Clapa ◽  
Alexandru Fira ◽  
Manuela Simu ◽  
Monica Harta ◽  
Cristian Sisea
Keyword(s):  
Shoot Proliferation ◽  
Ex Vitro Rooting ◽  
Wheat Starch ◽  
Axillary Shoot ◽  
Multiplication Rate ◽  
Ex Vitro ◽  
Apple Rootstock ◽  
Axillary Shoot Proliferation ◽  
D 20

The apple rootstock varieties ‘MM 106/4’, ‘MM 106/6’, ‘D 18’, ‘D 20’, ‘JTE-H’ and ‘MR 09/4’ were multiplied in vitro on modified Murashige and Skoog media gelled with wheat starch (MSs) and supplemented with 0.7 mg/l BA, which provided intense axillary shoot proliferation. Among the genotypes we studied, MR 09/4 had the highest multiplication rate  (19.56), followed by D18 (15.36). The lowest multiplication rates were recorded in MM 106/6 (5.36) and in MM 106/4 (3.32). The use of the technique of direct ex vitro rooting and acclimatization in floating perlite provided rooting percentages of more than 90 %.

scholarly journals Micropropagation and Ex Vitro Rooting of Wolfberry

HortScience ◽  
2018 ◽  
Vol 53 (10) ◽  
pp. 1494-1499 ◽  
Author(s):  
Cristian Silvestri ◽  
Gianmarco Sabbatini ◽  
Federico Marangelli ◽  
Eddo Rugini ◽  
Valerio Cristofori
Keyword(s):  
Shoot Proliferation ◽  
Multiple Shoots ◽  
Ex Vitro Rooting ◽  
Axillary Shoot ◽  
Nodal Segment ◽  
Ex Vitro ◽  
Lycium Barbarum ◽  
Axillary Shoot Proliferation ◽  
Very High

An accurate protocol for the in vitro propagation of a commercial wolfberry (Lycium barbarum L.) cv. Nixia 1 has been developed through axillary shoot proliferation. Driver and Kuniyuki Walnut (DKW) medium supplemented with 6-benzylaminopurine (BAP; 0.5 mg/L) and sucrose 3% w/v gave the best results compared with other basal media tested, with significantly improved production of multiple shoots direct from nodal segment explants, resulting in an average of 6.73 shoots/explant with an average of 7.45 nodes/shoot that would potentially form new explants. Rooting of shoot explants was carried out both in vitro and ex vitro with 0.5 and 1 mg/L of indole-3-butyric acid (IBA), with or without adding putrescine (160 mg/L). In all cases, rooting efficiency resulted very high, and putrescine was effective only when combined with a low concentration of auxin. Plantlets were hardened off in jiffy pots under greenhouse conditions, with a survival rate of more than 90%. Ex vitro rooting, performed by dipping in an aqueous solution of IBA 100 mg/L, is the preferred technique not only because rooting and acclimatization are very high but also reducing micropropagation to one phase is more economical.

scholarly journals Optimization of Micropropagation Protocol for Goji Berry (Lycium barbarum L.)

2016 ◽  
Vol 73 (2) ◽  
pp. 141 ◽  
Author(s):  
Alexandru Fira ◽  
Nirmal Joshee ◽  
Victoria Cristea ◽  
Manuela Simu ◽  
Monica Harta ◽  
...  
Keyword(s):  
Shoot Proliferation ◽  
Optimal Number ◽  
Wheat Starch ◽  
Ms Medium ◽  
Ex Vitro ◽  
Benzyl Adenine ◽  
Lycium Barbarum ◽  
Floating Cell ◽  
The Media

Micropropagation of Lycium barbarum cv. 'Ningxia N1' was achieved. The cultures were by initiated by axenical seed germination. The highest shoot proliferation was obtained on the MS media with 1.33 or 2.22 µM benzyl adenine, gelled with wheat starch as an agar alternative. The treatments with 2.22 µM benzyl adenine ensured proliferation rates superior to the ones with 1.33 μM benzyl adenine, but the latter provided longer and more robust shoots. Use of large microcuttings as an explant onto the multiplication media ensured higher in vitro explant survival, higher number of shoots regeneration and more vigorous plantlets. The microcuttings inserted vertically into the media yielded superior growth and multiplication as compared to the microcuttings placed horizontally. The non-rooted, elongated shoots from the treatment 1.33 μM benzyl adenine were either rooted in vitro on a hormone-free MS medium with starch or used for direct ex vitro rooting and acclimatization. The optimal number of microcuttings/vessel for in vitro rooting was 40 and the rooted plantlets were efficiently acclimatized ex vitro by three methods: float hydroculture in floating cell trays, floating perlite, and in Jiffy7 pellets.

scholarly journals In Vitro Propagation of an Endangered Helianthus verticillatus by Axillary Bud Proliferation

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 712
Author(s):  
Marzena Nowakowska ◽  
Žaklina Pavlović ◽  
Marcin Nowicki ◽  
Sarah L. Boggess ◽  
Robert N. Trigiano
Keyword(s):  
Endangered Species ◽  
Shoot Proliferation ◽  
Genetic Fidelity ◽  
Induction Medium ◽  
Axillary Shoot ◽  
Axillary Shoot Proliferation ◽  
Regenerated Plants ◽  
Micropropagated Plants ◽  
Ssrs Markers

Helianthus verticillatus (Asteraceae), whorled sunflower, is a perennial species restricted to a few locations in the Southeastern United States. Habitat loss has caused H. verticillatus to become rare, and since 2014, it has been federally listed as an endangered species. As a part of the recovery plan for the restoration and protection of H. verticillatus, an efficient micropropagation protocol based on axillary shoot proliferation was developed. Various concentrations of 6-benzylaminopurine (BAP; 0 to 4.44 µM) were examined for their morphogenetic potential in the regeneration of six genotypes of H. verticillatus from the nodal explants derived from greenhouse-grown plants. Both the BAP concentration and genotype had significant effects on the regeneration capacity of H. verticillatus. Although the induced buds were observed on ½-strength Murashige and Skoog medium without plant growth regulators, a higher rate of induction and bud development were achieved on media with either 0.88 or 2.22 µM BAP, regardless of the genotype. Successful rooting of the induced shoots was achieved within four weeks after the transfer from the induction medium to the fresh ½-strength MS medium, but the rooting efficiency was dependent on the plant’s genetic background. Regenerated plantlets, with well-developed shoots and roots, were acclimatized successfully to greenhouse conditions with a 97% survival rate. Simple sequence repeats (SSRs) markers were employed to assess the genetic uniformity of the micropropagated plants of H. verticillatus. No extraneous bands were detected between regenerants and their respective donor plants, confirming the genetic fidelity and stability of regenerated plants. To our knowledge, the protocol developed in this study is the first such report for this endangered species.

scholarly journals Micropropagation of Clerodendrum phlomidis L.F.

2016 ◽  
Vol 24 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Mafatlal M. Kher ◽  
Deepak Soner ◽  
Neha Srivastava ◽  
Murugan Nataraj ◽  
Jaime A. Teixeira da Silva
Keyword(s):  
Callus Formation ◽  
Shoot Proliferation ◽  
Shoot Multiplication ◽  
Nodal Explants ◽  
Axillary Shoot ◽  
Naphthaleneacetic Acid ◽  
Ms Medium ◽  
Axillary Shoot Proliferation ◽  
Clerodendrum Phlomidis

Abstract Clerodendrum phlomidis L. f. is an important medicinal plant of the Lamiaceae family, particularly its roots, which are used for various therapeutic purposes in a pulverized form. The objective of this study was to develop a standard protocol for axillary shoot proliferation and rooting of C. phlomidis for its propagation and conservation. Nodal explants were inoculated on Murashige and Skoog (MS) medium that was supplemented with one of six cytokinins: 6-benzyladenine, kinetin, thidiazuron, N6-(2-isopentenyl) adenine (2iP), trans-zeatin (Zea) and meta-topolin. Callus induction, which was prolific at all concentrations, formed at the base of nodal explants and hindered shoot multiplication and elongation. To avoid or reduce callus formation with the objective of increasing shoot formation, the same six cytokinins were combined with 4 μM 2,3,5-tri-iodobenzoic acid (TIBA) alone or in combination with 270 μM adenine sulphate (AdS). Nodal explants that were cultured on the medium supplemented with 9.12 μM Zea, 4 μM TIBA and 270 μM AdS produced significantly more and longer shoots than on medium without TIBA and AdS. Half-strength MS medium supplemented with 8.05 μM α-naphthaleneacetic acid was the best medium for root formation. Most (75%) in vitro rooted plantlets were successfully acclimatized under natural conditions.

scholarly journals In Vitro Propagation of Muscadine Grape by Axillary Shoot Proliferation

1990 ◽  
Vol 115 (2) ◽  
pp. 324-329 ◽  
Author(s):  
Ni Lee ◽  
Hazel Y. Wetzstein
Keyword(s):  
Basal Medium ◽  
Shoot Proliferation ◽  
Nodal Segments ◽  
Axillary Shoot ◽  
Axillary Shoot Proliferation ◽  
Vitis Rotundifolia ◽  
Shoot Production ◽  
Muscadine Grape ◽  
Better Than

Plantlets were recovered from axillary bud cultures of muscadine grape (Vitis rotundifolia, `Summit'). Nodal segments 0.5 to 1.0 cm long were cultured in Murashige and Skoog (MS) basal medium supplemented with 5, 10, 20, or 40 μm BA. Best total shoot production was obtained with 10 μm BA; with higher BA levels, shoots were unexpanded and exhibited high mortalities. MS medium supplemented with IBA enhanced rooting by increasing rooting percentage and number per plantlet. Shoots previously proliferated on medium with 5 μm BA rooted significantly better than those multiplied on 10 μM BA. Shoot vigor during rooting was greater in shoots proliferated on 5 vs. 10 μm BA. Root development was not significantly affected by liquid vs. agar-solidifted medium or shoot length. Chemical names used: N-(phenylmethyl) -1H-purin-6-amine (BA), 1H-indole-3-butyric acid (IBA).

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