Micropropagation, Characterization, and Conservation of Phytophthora cinnamomi-Tolerant Holm Oak Mature Trees

Holm oak populations have deteriorated drastically due to oak decline syndrome. The first objective of the present study was to investigate the use of axillary budding and somatic embryogenesis (SE) to propagate asymptomatic holm oak genotypes identified in disease hotspots in Spain. Axillary budding was achieved in two out of six tolerant genotypes from the south-western region and in two out of four genotypes from the Mediterranean region. Rooting of shoots cultured on medium supplemented with 3 mg L−1 of indole-3-acetic acid plus 0.1 mg L−1 α-naphthalene acetic acid was achieved, with rates ranging from 8 to 36%. Shoot cultures remained viable after cold storage for 9–12 months; this procedure is therefore suitable for medium-term conservation of holm oak germplasm. SE was induced in two out of the three genotypes tested, by using nodes and shoot tips cultured in medium without plant growth regulators. In vitro cloned progenies of the tolerant genotypes PL-T2 and VA5 inhibited growth of Phytophthora cinnamomi mycelia when exposed to the oomycete in vitro. Significant differences in total phenol contents and in the expression profiles of genes regulating phenylpropanoid biosynthesis were observed between in vitro cultured shoots derived from tolerant trees and cultures established from control genotypes.

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In vitro callus induction of gerbera from leaf explant

International Journal of Advanced Geosciences ◽

10.14419/ijag.v8i1.30000 ◽

2020 ◽

Vol 8 (1) ◽

pp. 1

Author(s):

Sadia Afrin Jui ◽

Md. Mijanur Rahman Rajib ◽

M. Mofazzal Hossain ◽

Sharmila Rani Mallik ◽

Iffat Jahan Nur ◽

...

Keyword(s):

Acetic Acid ◽

Growth Regulators ◽

Callus Induction ◽

Leaf Explants ◽

Leaf Explant ◽

Naphthalene Acetic Acid ◽

Dichlorophenoxyacetic Acid ◽

Ms Medium ◽

Indole 3 Acetic Acid

The experiment was designed to evaluate the effect of growth regulators on leaf explant of Gerbera for callus induction. Various kinds of plant growth regulators such as 6-Benzylaminopurine (BAP), α-Naphthalene acetic acid (NAA), 2, 4-Dichlorophenoxyacetic acid (2, 4-D), Indole-3-acetic acid (IAA) were used to initiate cultures. These were added to Murashige and Skoog medium in different combinations and concentrations. Leaf explants cultured on MS medium supplemented with BAP+ 2, 4-D+ IAA in T4 treatment & BAP+ 2,4-D in T5 treatment showed the best results for callus induction. On the other hand callus was induced early in the combination of BA+ 2,4-D + IAA hormone in T5, T9 & T8 treatment respectively. The rate of callus induction was very low in BA + NAA combinations but it was much earlier.

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Vegetative Propagation of Phytophthora cinnamomi-Tolerant Holm Oak Genotypes by Axillary Budding and Somatic Embryogenesis

Forests ◽

10.3390/f11080841 ◽

2020 ◽

Vol 11 (8) ◽

pp. 841

Author(s):

Maria Teresa Martínez ◽

Francisco Javier Vieitez ◽

Alejandro Solla ◽

Raúl Tapias ◽

Noelia Ramírez-Martín ◽

...

Keyword(s):

Somatic Embryogenesis ◽

Somatic Embryos ◽

Phytophthora Cinnamomi ◽

Shoot Proliferation ◽

Holm Oak ◽

Induction Medium ◽

Axillary Shoot ◽

Oak Decline ◽

Shoot Cultures

Holm oak (Quercus ilex) is one of the most widely distributed tree species in the Mediterranean basin. High mortality rates have been observed in holm oak populations in the southwest of the Iberian Peninsula as a result of oak decline syndrome. Selection and propagation of genotypes tolerant to this syndrome could aid the restoration of affected areas. In this article, we report micropropagation and conservation procedures based on axillary budding and somatic embryogenesis (SE) of holm oak plants, selected for their tolerance to Phytophthora cinnamomi—the main biotic factor responsible for oak decline. Forced shoots were obtained from potted plants of eight different genotypes, and used as stock material to establish in vitro shoot proliferation cultures. Reliable shoot proliferation was obtained in seven out the eight genotypes established in vitro, whereas multiplication rates were genotype-dependent. The highest rooting rates were obtained by culturing shoots for 24 h or 48 h on rooting induction medium containing 25 mg L−1 indole-3-butyric acid, followed by transfer to medium supplemented with 20 µM silver thiosulphate. Axillary shoot cultures can be successful conserved by cold storage for 12 months at 4 °C under dim lighting. Shoot tips, excised from axillary shoot cultures established from tolerant plants, were used as initial explants to induce SE. Somatic embryos and/or nodular embryogenic structures were obtained on induction medium with or without indole-acetic acid 4 mg L−1, in two out the three genotypes evaluated, and induction rates ranged between 2 and 4%. Plantlet recovery was 45% after two months cold stratification of somatic embryos and eight weeks of culture on germination medium. Vegetative propagation of P. cinnamomi-tolerant Q. ilex trees is a valuable milestone towards the restoration of disease-affected areas.

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Efficient In Vitro Plant Regeneration from Internode Explants of Ibervillea sonorae: An Antidiabetic Medicinal Plant

HortScience ◽

10.21273/hortsci11942-17 ◽

2017 ◽

Vol 52 (7) ◽

pp. 1000-1005 ◽

Cited By ~ 1

Author(s):

Ilse-Yazmín Arciniega-Carreón ◽

Carmen Oliver-Salvador ◽

María-Guadalupe Ramírez-Sotelo ◽

Carlos Edmundo Salas

Keyword(s):

Acetic Acid ◽

Plant Regeneration ◽

Medicinal Plant ◽

Metabolic Disorders ◽

Naphthalene Acetic Acid ◽

In Vitro Plant Regeneration ◽

Shoot Production ◽

In Vitro Plant ◽

Indole 3 Acetic Acid

Ibervillea sonorae is a medicinal plant mainly used to treat diabetes, ulcers, and other metabolic disorders. A regeneration protocol using internode segments containing axillary buds grown on Gamborg medium (B5) supplemented with 0.5 mg·L−1 α-naphthalene-acetic acid (NAA), 0.5 mg·L−1 N6-benzyladenine (BA), and 1.0 mg·L−1 indole-3-acetic acid (IAA) successfully regenerated shoots in I. sonorae explants. The induction of organogenic calli attained 100% efficiency. The highest percent shoot production was 87.5% with a mean of 9.17 shoots per explant on day 15, and the maximum length of 5.8 cm was observed on day 21. Regenerated shoots induced roots in B5 medium supplemented with 0.5–3.0 mg·L−1 indole-3-butyric acid (IBA). The maximum rooting frequency observed in the medium containing 2.0 mg·L−1 IBA was 83.3% which promoted long, thick roots on day 21. The plantlets with emerging roots grown at the culture facility attained 50% survival after acclimatization for 30 d. The account describes a simple and efficient protocol for in vitro plant regeneration, and this micropropagation procedure offers an alternative for preservation of this medicinal plant.

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In vitro propagation of the endangered orchid Dendrobium chryseum Rolfefrom protocorms culture

Nepal Journal of Science and Technology ◽

10.3126/njst.v19i1.29737 ◽

2020 ◽

Vol 19 (1) ◽

pp. 39-47 ◽

Cited By ~ 2

Author(s):

Sabitri Maharjan ◽

Laxmi Sen Thakuri ◽

Bir Bahadur Thapa ◽

Shreeti Pradhan ◽

Krishna K. Pant ◽

...

Keyword(s):

Acetic Acid ◽

Gibberellic Acid ◽

In Vitro Propagation ◽

Seedling Development ◽

Naphthalene Acetic Acid ◽

Mass Propagation ◽

Endangered Orchid ◽

Immature Seeds ◽

Indole 3 Acetic Acid

The immature seeds of Dendrobiumchryseum, asympodial epiphytic orchid with yellow flowers, were cultured in vitro, and the resultant protocorms were used as explants for seedling development. Protocorms were cultured on½ M.S. medium fortified with Kinetin (Kn), 6-Benzylaminopurine (BAP), and Gibberellic Acid (GA3) in three concentrations (0.5mg/l, 1.0mg/land 2.0 mg/l) both alone and supplemented with 5% and 10% coconut water (C.W.). The highest number of shootsofD. chryseum developed on ½ - M.S. medium fortified with 2.0mg/lofKn and10% C.W. and the longest shootsdeveloped on ½ M.S. media fortified with 1.0mg/lGA3, and 10% C.W. The shoot derived from protocorms were placed in ½ M.S. medium fortified with three different rooting hormones, Indole -3- acetic acid (IAA), Indole -3-butyric acid (IBA) and α-Naphthalene acetic acid (NAA) in different concentrations alone as well as with each 1.0mg/l hormone combined with 10% C.W. The most effective of these media was ½ M.S. medium fortified with 1.5 mg/l IAA for rooting as well as for the production of longest roots. The present study could be useful for standardizing the protocol for mass propagation of the endangered orchid Dendrobiumchryseum.

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MICROPROPAGATION AND ACCLIMATIZATION OF Aegiphila verticillata Vell.: AN ENDANGERED WOODY SPECIES

Revista Árvore ◽

10.1590/0100-67622015000200010 ◽

2015 ◽

Vol 39 (2) ◽

pp. 305-314 ◽

Cited By ~ 1

Author(s):

Luísa Maria Silveira de Almeida ◽

Leandro Elias Morais ◽

Cristiano Ferrara de Resende ◽

Virgínia Fernandes Braga ◽

Paula da Fonseca Pereira ◽

...

Keyword(s):

Acetic Acid ◽

Native Species ◽

Culture Medium ◽

Anthropogenic Activities ◽

Woody Species ◽

Naphthalene Acetic Acid ◽

Culture Development ◽

Shoot Propagation ◽

Indole 3 Acetic Acid

The objective of this work was to establish an efficient protocol for in vitro multiplication and rooting, as well as ex vitroacclimatization of Aegiphila verticillata, a woody species found in Brazilian rocky fields. Aseptic cultures were established by seeds and two multiplication analyses were performed. In the first, we employed 6-benzylaminopurine (BAP – 0, 2.5, 5 and 7.5 μM) + α-naphthalene acetic acid (NAA – 0, 0.2, 0.4 and 0.6 μM) and, in the second, were studied adenine sulfate, kinetin and thidiazuron (0, 5, 7.5, 10 and 12.5 μM). After 90 days, we assessed the quantitative and qualitative shoot propagation. There were more than 90% seed germination and low contamination (2%). In multiplication phase, the culture medium that promoted the best quantitative and qualitative culture development was supplemented with 7.5 μM BAP + 0.4 μM NAA. In the rooting assay, were used NAA, indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA) (0, 0.1, 0.2, 0.3 or 0.4 μM). After 90 days, the root number and rooting quality were evaluated. In this analysis, differences were not found between the control and the other treatments. Rooted plantlets were acclimatized in styrofoam trays for 30 days, after which they were transferred to pots in the greenhouse. Only 3% of the plants subjected to initial acclimatization died and 70% of the plants transferred to the field conditions survived and showed normal development. The results founded in this work are the first involving in vitro propagation and ex vitroacclimatization of Aegiphila verticillata and provide a continuous supply of this medicinal native species, endangered due anthropogenic activities.

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In vitro Micropropagation of Boswellia ovalifoliolata

Zeitschrift für Naturforschung C ◽

10.1515/znc-2005-5-621 ◽

2005 ◽

Vol 60 (5-6) ◽

pp. 505-507 ◽

Cited By ~ 2

Author(s):

Thummala Chandrasekhar ◽

T. Mohammad Hussain ◽

Boddu Jayanand

Keyword(s):

Acetic Acid ◽

Basal Medium ◽

Shoot Multiplication ◽

Naphthalene Acetic Acid ◽

Nodal Explant ◽

In Vitro Micropropagation ◽

Boswellia Ovalifoliolata ◽

Regenerated Plantlets ◽

Indole 3 Acetic Acid

A protocol for micropropagation of Boswellia ovalifoliolata Bal & Henry (Burseraceae) was developed using cotyledonary nodal explant on Murashige and Skoog modified medium (MS). A comparative study of micropropagation with 6-benzyladenine, kinetin and thidiazuron along with 1-naphthalene acetic acid (0.054 μм) was conducted. The highest shoot multiplication (7.1 ± 0.2 shoots per node) was achieved in 50 d on MS supplemented with thidiazuron (2.72 μм). Excised shoot cuttings of 3.0 cm were placed on the MS basal medium supplemented with indole-3-acetic acid and indole-3-butyric acid alone and in combinations for rooting. Activated charcoal (100 mg l-1) and polyvinylpyrrolidone (40 mg l-1) were added to the medium to prevent browning of cultures. The regenerated plantlets have been successfully acclimatized and transferred to soil.

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Micropropagation of Chaenomeles japonica: A Step towards Production of Polyphenol-rich Extracts Showing Antioxidant and Antimicrobial Activities

Molecules ◽

10.3390/molecules24071314 ◽

2019 ◽

Vol 24 (7) ◽

pp. 1314 ◽

Cited By ~ 4

Author(s):

Małgorzata Kikowska ◽

Agata Włodarczyk ◽

Monika Rewers ◽

Elwira Sliwinska ◽

Elżbieta Studzińska-Sroka ◽

...

Keyword(s):

Antimicrobial Activity ◽

Acetic Acid ◽

Antimicrobial Activities ◽

Shoot Cultures ◽

Regeneration Potential ◽

Size Stability ◽

Indole 3 Acetic Acid ◽

Hplc Analyses ◽

Antioxidant And Antimicrobial Activities

A protocol for C. japonica micropropagation with a confirmation of genome size stability of the in vitro-propagated plantlets was developed. The highest number of shoots multiplied in vitro was obtained on Murashige & Skoog medium (MS) with 1.0 mg L−1 N6-benzyladenine plus 1.0 mg L−1 indole-3-acetic acid. The highest number of roots was observed for the shoots on MS with 15 g L−1 sucrose plus 1.0 mg L−1 indole-3-acetic acid. The acclimatization rate was significantly high. The qualitative HPLC analyses confirmed the presence of phenolic acids and flavonoids in the extracts. The extracts from both shoot cultures and the leaves from field-grown plants revealed antioxidant activity and they exhibited moderate antimicrobial activity. The conducted research confirmed the regeneration potential of genetically-stable plants of C. japonica under in vitro conditions, the ability of the plantlets to produce polyphenols as those present in field-grown plants, as well as their antioxidant potential.

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Influence of growth regulators and explants on shoot regeneration in carnation

Horticultural Science ◽

10.17221/1/2009-hortsci ◽

2009 ◽

Vol 36 (No. 4) ◽

pp. 140-146 ◽

Cited By ~ 4

Author(s):

J.K. Kanwar ◽

S. Kumar

Keyword(s):

Acetic Acid ◽

Shoot Regeneration ◽

Growth Regulators ◽

Dianthus Caryophyllus ◽

Naphthalene Acetic Acid ◽

Ms Medium ◽

Shoot Bud ◽

Dichlorophenoxy Acetic Acid ◽

Number Of Shoots

The influence of growth regulators, explants and their interactions on in vitro shoot bud formation from callus was studied in <I>Dianthus caryophyllus</I> L. The leaf and internode explants were cultured on Murashige and Skoog (MS) medium containing different concentrations of growth regulators. The highest callus induction was observed with 2 mg/l 2,4-dichlorophenoxy acetic acid (2,4-D) and 1 mg/l benzyl adenine (BA). Out of twenty seven shoot regeneration media tested, only 2 mg/l thidiazuron (TDZ) and zeatin alone or in combination with naphthalene acetic acid (NAA) and/or indole acetic acid (IAA) could differentiate calli. The highest average number of shoots was observed with 2 mg/l TDZ and 1 mg/l IAA. Significant differences were observed in calli producing shoots and number of shoots per callus in the explants of leaf and internode. The shoots were elongated and multiplied on MS medium supplemented with 1 mg/l BA and solidified with 1% agar. The shoots were rooted and hardened with 76% survival success in pots after six weeks of transfer to the pots.

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The ectopic expression of Arabidopsis glucosyltransferase UGT74D1 affects leaf positioning through modulating indole-3-acetic acid homeostasis

Scientific Reports ◽

10.1038/s41598-021-81016-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Shanghui Jin ◽

Bingkai Hou ◽

Guizhi Zhang

Keyword(s):

Acetic Acid ◽

Ectopic Expression ◽

Leaf Angle ◽

Kinase Substrate ◽

Auxin Distribution ◽

Leaf Tissues ◽

Photosynthesis Efficiency ◽

Indole 3 Acetic Acid

AbstractLeaf angle is an important agronomic trait affecting photosynthesis efficiency and crop yield. Although the mechanisms involved in the leaf angle control are intensively studied in monocots, factors contribute to the leaf angle in dicots are largely unknown. In this article, we explored the physiological roles of an Arabidopsis glucosyltransferase, UGT74D1, which have been proved to be indole-3-acetic acid (IAA) glucosyltransferase in vitro. We found that UGT74D1 possessed the enzymatic activity toward IAA glucosylation in vivo and its expression was induced by auxins. The ectopically expressed UGT74D1 obviously reduced the leaf angle with an altered IAA level, auxin distribution and cell size in leaf tissues. The expression of several key genes involved in the leaf shaping and leaf positioning, including PHYTOCHROME KINASE SUBSTRATE (PKS) genes and TEOSINTE BRANCHED1, CYCLOIDEA, and PCF (TCP) genes, were dramatically changed by ectopic expression of UGT74D1. In addition, clear transcription changes of YUCCA genes and other auxin related genes can be observed in overexpression lines. Taken together, our data indicate that glucosyltransferase UGT74D1 could affect leaf positioning through modulating auxin homeostasis and regulating transcription of PKS and TCP genes, suggesting a potential new role of UGT74D1 in regulation of leaf angle in dicot Arabidopsis.

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In vitro Shoot Cultures of Tupistra albiflora K. Larsen

Walailak Journal of Science and Technology (WJST) ◽

10.48048/wjst.2020.4182 ◽

2018 ◽

Vol 17 (5) ◽

pp. 405-411

Author(s):

Jiraporn PALEE

Keyword(s):

Agar Medium ◽

Multiple Shoots ◽

Shoot Formation ◽

Multiple Shoot ◽

Naphthalene Acetic Acid ◽

Root Induction ◽

Shoot Cultures ◽

Ms Medium ◽

In Vitro Shoots

To evaluate an efficient protocol for the micropropagation of Tupistra albiflora K. Larsen, the effects of N6-benzylaminopurine (BA) and naphthalene acetic acid (NAA) concentrations on multiple shoot and root induction were examined. In vitro shoots were used as the explant materials which were cultured on Murashige and Skoog (MS) agar medium supplemented with 0, 1, 2, 3 and 4 mg/L BA for 4 weeks to induce multiple shoots. It was found that the MS medium containing 3 mg/L BA induced 100 % shoot formation with the highest number of 3.2 shoots per explant (2.4-fold significantly higher than the control). For root induction, in vitro shoots were cultured on MS agar medium supplemented with 0, 1, 2, 3 and 4 mg/L NAA for 8 weeks. The results showed that the MS medium containing 1 mg/L NAA induced 100 % root formation with the highest number of 6.6 roots per explant (1.8-fold significantly higher than the control).

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