Recent Articles

Below are the titles and abstracts from the most recent articles published in In Vitro Cellular and Developmental Biology – Plant. Click on the title to view the full article at Springerlink.


  • Morphological, cytological, and pigment analysis of leaf color variants regenerated from long-term subcultured caladium callus
    on August 10, 2020 at 12:00 am

    Abstract Cultivated caladiums (Caladium × hortulanum Birdsey) are popular ornamental plants. Although somaclonal variation occurs frequently in caladium during tissue culture, little research has been conducted on obtaining and detecting variants from long-term callus cultures. Herein, plants were regenerated from ‘Red Flash’ caladium calluses subcultured for approximately 40 mo, and 116 out of 520 established plants were grouped into 14 somaclonal variation types based on their morphological differences. Nuclear DNA content of six types (SVT1, SVT2, SVT4, SVT5, SVT8, and SVT10) varied from − 1.08% to 0.33% compared with the wild type, and these variants shared a similar chromosome number to the wild caladium (2n = 2x = 30). Three types (SVT3, SVT7, and SVT9) containing 2.82 to 5.42% less nuclear DNA content was the result of losing one or two chromosomes, and one type (SVT6) with significantly lower […]

  • An efficient micropropagation protocol for Monochasma savatieri Franch. ex Maxim through seed germination and direct shoot regeneration
    on August 6, 2020 at 12:00 am

    Abstract Monochasma savatieri Franch. ex Maxim is a valuable medicinal plant that is currently threatened due to human over excavation. Therefore, an efficient plant micropropagation protocol for M. savatieri through seed germination and direct shoot regeneration is described. The effects of different seed germination treatments, explant source on shoot induction, plant growth regulators on shoot multiplication, and survival rate of regenerated plants were examined. The highest M. savatieri seed germination rate was over 90% on Murashige and Skoog (MS) medium supplemented with 0.1 mg L−1 6-benzylaminopurine (6-BA) and 0.01 mg L−1 α-naphthaleneacetic acid (NAA), with the survival rate reaching 86.0% one-mo after transplanting to soil. Direct shoot proliferation was achieved with two explant types, but the use of nodal stem explants gave best results in comparison to shoot tip explants regarding shoot multiplication frequency and […]

  • An NAC transcription factor gene from Malus baccata , MbNAC29 , increases cold and high salinity tolerance in Arabidopsis
    on August 5, 2020 at 12:00 am

    Abstract NAC (no apical meristem [NAM], Arabidopsis thaliana transcription activation factor [ATAF1/2], and cup-shaped cotyledon [CUC2]) TFs are involved in stress responses in plants. However, their roles in abiotic stresses are still not well known in Malus plants. In the present study, MbNAC29 from Malus baccata was identified and characterized. Quantitative real-time PCR analysis revealed that the expression of MbNAC29 was induced by cold, high salinity, drought, and heat. The open reading frame (ORF) of MbNAC29 is 1122 bp, encodes 373 amino acids. Subcellular localization showed that the MbNAC29-GFP (green fluorescent protein) fusion protein was localized in the nucleus. Furthermore, MbNAC29 was highly expressed in new leaf and mature leaf. When MbNAC29 was introduced into Arabidopsis, it improved cold and high salinity tolerance in transgenic plants under low-temperature stress (− 4°C) and salt stress (200 mM NaCl). When MbNAC29 was […]

  • Genetic transformation of the tropical vine Pentalinon andrieuxii (Apocynaceae) via Agrobacterium rhizogenes produces plants with an increased capacity of terpenoid production
    on August 4, 2020 at 12:00 am

    Abstract Genetic modification using Agrobacterium rhizogenes has been an important biotechnological tool for the improvement of secondary metabolite production in plant species over the past four decades. The tropical vine Pentalinon andrieuxii, a native plant from the Yucatán Peninsula, is known to produce the triterpene betulinic acid and the novel tri-nor-sesquiterpene urechitol A and is used in the Mayan traditional medicine to treat leishmaniasis-derived lesions. Agrobacterium rhizogenes strain ATCC 15834 was used to infect leaf and hypocotyl explants of P. andrieuxii to generate 14 transformed plant lines with increased production of the terpenoids betulinic acid and urechitol A. Insertion of the transgenes was confirmed through PCR amplification of the rolA, rolB, and rolC genes. Betulinic acid and urechitol A were detected and quantified using standardized high-performance liquid chromatography and gas chromatography analyses, respectively. A […]

  • Influence of different cytokinins on micropropagation of an important medicinal plant, Solanum erianthum D. Don, and assessment of the genetic fidelity of the regenerants
    on August 1, 2020 at 12:00 am

    Abstract The present study describes the first successful report on an efficient in vitro protocol for direct and indirect organogenesis of an important medicinal and anticancerous plant, Solanum erianthum D. Don. An optimal response using leaf explants was achieved in half-strength Murashige and Skoog (MS)-medium supplemented with 5 mg L−1 naphthalene acetic acid for friable callus formation and 2 mg L−1 naphthaleneacetic acid and 0.5 mg L−1 6-benzylaminopurine amino purine for induction of compact callus. The maximum number of shoot buds (20.33 ± 11.55) was obtained from compact callus using indirect shoot organogenesis in MS medium supplemented with 0.5 mg L−1 thidiazuron among the four cytokinins tested, which included 6-benzyl amino purine, kinetin, 6-γ,γ-dimethylallylamino purine, and thidiazuron. Supplements of 3 mg L−1 6-benzyl amino purine […]

  • Production of Norway spruce embryos in a temporary immersion system (TIS)
    on August 1, 2020 at 12:00 am

    Abstract Somatic embryogenesis has already been used for Norway spruce (Picea abies (L.) Karst) embling production on a laboratory scale, but automation is needed to increase efficiency and reduce costs. One option to scale up production is mass production in bioreactors. In a series of experiments, a pro-embryogenic mass was propagated using Plantform temporary immersion system bioreactors, and the effect of different aeration cycles, support pad materials, and post-maturation treatments (rinsing and desiccation) on the embryo yield and embling survival after 4 to 6 mo in a greenhouse was tested. Three genotypes were used to test each treatment. The best aeration frequency was 20 min every 4 h, while a lower or higher frequency did not generally improve embryo production. Filter paper on plastic netting was the best support pad material in terms of usability and embryo production (varying from 177 ± 20 to […]

  • 2020 World Congress on In Vitro Biology, June 6 – 10, Virtual Pre-Recorded Meeting
    on August 1, 2020 at 12:00 am
  • Micropropagation and essential oil characterization of Plectranthus amboinicus (Lour.) Sprengel, an aromatic medicinal plant
    on August 1, 2020 at 12:00 am

    Abstract Plectranthus amboinicus (Loureiro) Sprengel is a therapeutically valued herb highly sought by various industries. This has led to its uncontrolled harvest from the wild leading to the risk of extinction. As an alternative, commercial propagation of P. amboinicus is desirable to avoid further depletion of wild populations. This paper describes the establishment of an efficient protocol for the multiplication, rooting and acclimatization of P. amboinicus. The greatest frequency of shoot multiplication of P. amboinicus was on semi-solid Murashige and Skoog (MS) medium supplemented with 0.4 mg L−1 6-benzylaminopurine (BAP). Media supplemented with higher concentrations of BAP or used in combination with gibberellic acid (GA3) produced abnormal plantlets. Optimal rooting was observed on plantlets cultured in half strength MS medium. Acclimatization was achieved by transferring the rooted plants onto sterile peat-moss moistened with MS medium and […]

  • Maximization of micropropagule production in banana cultivars Grand naine (AAA) and Elakki (AB)
    on August 1, 2020 at 12:00 am

    Abstract Shoot tips from two different cultivars of banana known as Grand Naine (AAA) and Elakki (AB), were evaluated for their in vitro response in different concentrations of cytokinin and auxin which included 6-benzylaminopurine (6-BAP; 2, 3, and 4 mg L−1) and α-naphthalene acetic acid (NAA; 1 mg L−1) which was added to Murashige and Skoog (MS) basal media. The mean survival rates for cultured Grand Naine and Elakki explants in the varied growth regulator treatments were 66.25% and 52.5%, respectively. Rooting was initiated in the seventh passage using half-strength MS medium supplemented with 200 mg L−1 activated charcoal and 20 mg L−1 adenine sulfate (AS). The highest mean number of shoots generated per explant at the end of the seventh subculture from Grand Naine was 20.10 ± 0.73, and in Elakki, it was 11.20 ± 0.53. MS media supplemented with […]

  • Photomixotrophic growth response of sugarcane in vitro plantlets using different light intensities and culture vessel types
    on August 1, 2020 at 12:00 am

    Abstract Sugarcane is a very important crop in tropical areas around the world. Optimizing the light intensity and culture vessel for sugarcane in vitro propagation can improve protocols for large-scale in vitro mass clonal propagation. The objective of this study was to evaluate biometric and anatomical characteristics of in vitro propagated sugarcane plantlets using different light intensities and culture vessel types. The study also aimed to stimulate desired photoautotrophic and/or photomixotrophic traits and to study correlations between survival and ex vitro vigor with in vitro data. Fluorescent lights at 70 μmol m−2 s−1 and light-emitting diodes (LEDs) at 120 and 200 μmol m−2 s−1 were used combined with different culture vessel types, including microboxes without a filter, microboxes with a filter, and baby food jars. Propagation and rooting growth were observed in all in vitro culture conditions. […]

  • Comparison of shoot tip culture and cryotherapy for eradication of ampeloviruses associated with Pineapple mealybug wilt in wild varieties
    on August 1, 2020 at 12:00 am

    Abstract The Pineapple mealybug wilt-associated virus (PMWaV) provokes a disease that causes considerable losses to pineapple growers due to the reduced leaf tissue turgescence, resulting in leaf necrosis and death in severe cases. In this work, we describe the comparison of shoot tip culture and cryotherapy methods to eradicate the pineapple wilt disease-associated ampeloviruses. Plants from the accessions Ananas comosus var. comosus (AGB-009), var. bracteatus (AGB-119), and var. parguazensis (AGB-376) were indexed by RT-PCR, confirming mixed infections of PMWaV-1, PMWaV-2, and PMWaV-3. The accessions were cultured in vitro and their shoot tips treated by cryotherapy following a droplet vitrification protocol. The regeneration rate from shoot tip culture was 93% for AGB-376 and 100% for the other two accessions. After freezing, AGB-376 had 100% regeneration subsequent to exposure to PVS2 for 45 min, followed by 95% for AGB-009, while for AGB-119 the optimal […]

  • Synergistic effect of cytokinins and auxins enables mass clonal multiplication of drumstick tree ( Moringa oleifera Lam.): a wonder
    on August 1, 2020 at 12:00 am

    Abstract The synergistic effect of plant growth regulators on axillary bud proliferation for mass clonal multiplication of Moringa oleifera Lam. (vern. drumstick) has been assessed for the first time. Treatment of decoated seeds with 1% (w/v) Bavistin for 60 min, 0.33% (w/v) streptocycline for 30 min, and 0.1% (w/v) HgCl2 for 3.5 min resulted in complete removal of the surface contaminants. Maximum seed germination (89.13%) was obtained on quarter-strength Murashige & Skoog (MS) medium. Culture of nodal segments on MS + 6-benzyladenine (BA) at 3 mg L−1 resulted in multiple shoot proliferation with ~ 18 shoots per explant. All combinations of indole-3-acetic acid (IAA) + kinetin (Kn) resulted in elongated shoots, while only lower concentrations of BA (0.5 mg L−1), along with IAA (0.5 to 2 mg L−1), or Kn (0.5 to 5 mg L−1), showed significant synergy […]

  • Soybean androgenesis I: identification of pyramidal stressors in anther cultures that sustain cell divisions and putative embryo formation from isolated microspore cultures
    on August 1, 2020 at 12:00 am

    Abstract Soybean [Glycine max (L.) Merr.] is one of the most complete food crops and has fed people and livestock since its domestication. Soybean androgenesis has been a challenging process yet to be advanced significantly. There have been minor advances, e.g., reports of a 2% induction rate in anther culture, formation of roots, rare shoots, but few plantlets and these did not survive to maturity. This research attempted to identify pyramidal stressors (the combination of temperature shock and incubation conditions) for soybean androgenesis using anther cultures. The results across genotypes Jack, Thorne, Williams 82 and IAS-5 indicated that androgenesis can be stimulated up to 9 to 12% induction frequency by the use of 10°C day/8°C night for 3 d then 4°C overnight dark pretreatment of donor plants, a series of incubation temperatures from 11°C to 18°C to 25°C, and nitrogen starvation medium. The adaptation of the anther culture […]

  • Increased endogenous gibberellin level inhibits root growth of Pinus massoniana Lamb. plantlets during long-term subculture
    on August 1, 2020 at 12:00 am

    Abstract In this study, we investigated the roles of the plant hormones indole-3-acetic acid (IAA) and gibberellin (GA) in regulating Pinus massoniana Lamb. plantlet regeneration during long-term in vitro subculture. Six generations (1st, 5th, 10th, 20th, 30th and 40th with 40 days for each transfer cycle) of subcultured shoots derived from mature and juvenile explants were characterised for their different rooting capacities. In the present experiment, shoots were subcultured on rooting medium containing indole-3-acetic acid (IAA), naphthaleneacetic acid (NAA) or gibberellin (GA) inhibitor (paclobutrazol, PBZ). In addition, high-performance liquid chromatography (HPLC) was used to analyse endogenous hormone levels in shoots developed on medium with low concentrations of NAA. The concentration of endogenous IAA was highest in the 20th generation shoots, which also exhibited the strongest rooting ability. However, the highest GA concentration was observed in […]

  • Antioxidant activity of in vitro plantlets and callus cultures of Randia echinocarpa , a medicinal plant from northwestern Mexico
    on August 1, 2020 at 12:00 am

    Abstract Randia echinocarpa, an endemic plant to Northwest Mexico, is used as food and in traditional medicine, and several of its biological activities have been demonstrated (antioxidant, antimutagenic, antidiabetic, and immunomodulatory). Plant tissue culture is a safe and scalable system for plant propagation and production of bioactive compounds. Therefore, this study aims to establish protocols for seed germination and callus culture of R. echinocarpa and to evaluate the antioxidant activity of methanol extracts (ME) of plantlets and calli via the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) methods. Seeds were cultured in media with different concentrations of Murashige and Skoog (MS) salts and sucrose, and a higher germination rate and plantlet growth was observed in half-strength MS medium with 15 g L−1 of sucrose. Calli were obtained from cotyledon and hypocotyl explants […]

  • Assessment of direct shoot organogenesis and genetic fidelity in Solanum viarum Dunal—a commercially important medicinal plant
    on August 1, 2020 at 12:00 am

    Abstract Solanum viarum Dunal is an important medicinal plant with a high quantity of steroidal alkaloids used for the synthesis of contraceptives, corticosteroids, and sex hormones. It is also used by Indian tribal people for the treatment of leprosy, toothache, and diabetes. Therefore, to meet the existing needs for this plant, it is necessary to develop an efficient regeneration system useful for rapid and large-scale clonal propagation with ensured genetic fidelity. An efficient and improved regeneration protocol for prickly and prickleless genotypes of S. viarum has been developed using three explants, leaf, petiole, and internodes, under the influence of two plant growth regulators, thidiazuron (TDZ) and 6-benzyladenine (BA). Effects of genotype, explant type, and concentrations of TDZ and BA were studied. A higher percentage of shoot organogenesis (78.25% ± 2.53) and shoot number per explant (6.79 ± 1.04) were […]

  • Micropropagation, encapsulation, and conservation of Decalepis salicifolia , a vanillin isomer containing medicinal and aromatic plant
    on August 1, 2020 at 12:00 am

    Abstract An efficient in vitro propagation and synthetic seed production protocol was established for the conservation of Decalepis salicifolia (Bedd. ex Hook.f.) Venter, an endemic and critically endangered ethnomedicinal species. Murashige and Skoog (MS) media supplemented with 2.2 μM BAP and 5.7 μM IAA produced shoot tip proliferation with an average shoot length of 5.81 ± 0.03 cm in 3 wk. Axillary bud proliferation was found to be best in 11.1 μM BAP with an average of 3.5 ± 0.06 shoots per explant. Shoot tip and nodal explants were encapsulated in sodium alginate and their regeneration was achieved following storage at 4°C up to 12 wk. Successful rooting was obtained in modified MS medium with low nitrate and high sucrose concentration. Quarter strength MS media containing 2.5 mM each of NH4NO3 and KNO3 along with 8% sucrose produced an average number of […]

  • Overexpression of the OvBAN gene enhances the proanthocyanidin content in transgenic alfalfa ( Medicago sativa L.)
    on August 1, 2020 at 12:00 am

    Abstract Sainfoin (Onobrychis viciaefolia Scop) is a forage crop in the Leguminosae family. The leaves of this plant and other tissues have a high level of proanthocyanidins (PAs). The BAN gene encodes anthocyanidin reductase (ANR), which is a key enzyme in PA biosynthesis. This report describes cloning of a BAN homolog gene (viz., OvBAN) from local sainfoin and overexpression of this gene in alfalfa (Medicago sativa L.), a globally important forage crop. The open reading frame (ORF) of OvBAN contains 1020 bp, which is deduced to encode 339 amino acids. Alignment with amino acid sequences showed that OvBAN had 99%, 87%, and 85% identity to homologs from another Onobrychis viciaefolia variety, known as Lotus corniculatus, and Medicago sativa, respectively. The ORF of OvBAN was cloned into a binary vector under the control of the CaMV35S promoter, in which the nptII gene was used as a selectable marker. The resulting binary vector was introduced to alfalfa using […]

  • Influence of growth regulators on the development, quality, and physiological state of in vitro -propagated Lamprocapnos spectabilis (L.) Fukuhara
    on August 1, 2020 at 12:00 am

    Abstract There is little information on the in vitro tissue culture systems in Lamprocapnos spectabilis (bleeding heart). The aim of this study was to analyze the influence of plant growth regulators (PGRs) on the development, quality, and physiological state of in vitro-grown bleeding heart “Gold Heart” and “White Gold”. Single-node explants were inoculated on the modified MS medium (Murashige and Skoog in Physiol Plant 15:473–497, 1962), fortified with different auxins, which included indole-3-acetic acid (IAA), 1-naphthaleneacetic acid (NAA), and picloram (PIC), along with cytokinins, which included 6-benzyladenine (BA), kinetin (KIN), and thidiazuron (TDZ) at various concentrations. The morphogenetic response of the explants was cultivar-specific. KIN was preferable for the proliferation and development of shoots in “Gold Heart.” However, none of the auxins or cytokinins improved the development of “White […]

  • Effect of nitrogen concentration, source, and phosphate concentration on accumulation of biomass and calycosin-7-O-β-D-glucoside in Astragalus membranaceus adventitious roots
    on August 1, 2020 at 12:00 am

    Abstract Calycosin-7-O-β-D-glucoside (CG), a methoxylated isoflavonoid in Astragalus membranaceus Fisch. (Bunge), has a wide range of biological activities. Adventitious root culture is an alternative source to obtain active compounds. To improve CG production in A. membranaceus adventitious roots (AMARs), effect of nitrogen concentration, and phosphate concentration on accumulation of biomass, CG, and hydrogen peroxide were investigated. A low concentration of nitrogen promoted growth and CG accumulation in AMARs. Maximum biomass and CG productivity were obtained at a nitrogen concentration of 3 mM. Nitrate, rather than ammonium, was suitable for CG production. Phosphate concentration did not influence biomass accumulation; however, high concentration of phosphate (2.5 mM) was most favorable for CG accumulation. Furthermore, moderate levels of hydrogen peroxide promoted CG accumulation. Optimal concentrations of nitrogen and phosphate were used in […]

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