KR20170106809A - Method for mass propagation technique using somatic embryogenesis in very old Kalopanax septemlobus tree - Google Patents

Abstract

  The present invention relates to a method for cultivating a grafted seedlings by grafting a bamboo shoot (about 700 years old) with a 2-year-old grape seedlings (stock) to induce somatic embryogenesis by cutting leaf and petiole of the shoot stem This study is about conservation and restoration of useful forest resources that can be consumed and reproduces them in large quantities. It also suggests the possibility of industrial utilization of other forest resources, such as the growth of other natural forests of mangoes, mature trees, rare and endangered species It can be applied to in - flight reproduction of plants.

Description

[0002] The present invention relates to a method for mass propagation of somatic embryogenesis in somatic embryogenesis,

The present invention relates to a method for mass propagation of aged chickpea through somatic embryogenesis, and more particularly, to a method for mass propagation of aged chickwood by inducing somatic embryogenesis, Culturing the induced embryonic tissue to maintain and propagate the embryogenic tissue; Culturing the maintained and proliferating embryogenic tissue to induce somatic embryo; Culturing a somatic embryo to induce germination and plant propagation.

The present invention relates to mass propagation of aged chickpea through somatic embryogenesis. More specifically, the present invention relates to a method for breeding chickpea, The present invention relates to a method for mass propagation of a somatic embryo, which induces somatic embryogenesis, germination and regeneration of a somatic embryo.

Somatic embryo induction is the most efficient technique for breeding tissue cultures by inducing embryos (artificial embryos) in a test tube by applying tissue culture technology and then forming a plant through a series of embryo development processes . Somatic embryos induced technique is that first one is found in the carrot cell cultures such as Steward 1958 years, sumokryu in citrus (Non-Patent Document 1), Biota orientalis (Konar and Oberoi, 1965), Santalum album (Rao, 1965), Zamia and integrifolia (Norstog, 1965).

In 1985, a somatic embryo was induced in the German spruce ( Picea abies ), a conifer species, and then the study of somatic embryo induction in the wood exploded explosively, and somatic embryo induction results in more than 150 species have been reported so far (Dunstan et al 1995).

Although somatic embryo transfer is a breakthrough technology that can differentiate into whole plants from single cells, there are still many problems to be solved, the most difficult of which is to induce embryogenesis from mature stem sections (Bodhipadma and Leung, 2002 ; Dai et al. 2004).

Induction of embryogenic tissue is closely related to the juvenility of the cultured tissue (Bonga 2004; Capuana and Debergh 1997; Chalupa 2000; Feher et al. 2003; Merkle et al. 1997, 1998, 2003). As a result, it is one of the most important factors to obtain embryogenic tissues by selecting culture materials that are more readily available in the process of developing from the abdomen to the plant (Merkle and Battle, 2000 ).

It is important to select younger tissues from plants to induce embryogenic tissue (Raemakers et al., 1999; Sharp et al., 1980; Vendrame et al., 2001; Vookova et al. (Blasco M, 2013; von Aderkas P and Bonga JM, 2000) have been developed to induce embryogenesis from mature trees through application of adaptive technology and stress treatment.

The inventors of the present invention have developed a somatic embryo induction study on the Araliaceae and Araliaceae in Araliaceae plants in which the Araliaceae belong. In the case of Araliaceae, a plant regeneration technique that induced somatic embryogenesis was developed (Moon and Youn, 1999), and the stem induction technique from the slice of embryo (Moon et al. 2002), somatic embryogenesis induced by seeds (Moon et al. 2005), somatic embryo induction by genotypes (Park et al. 2011) and somatic embryogenesis induced by stress treatment from 40- Recently developed (Moon et al. 2015).

However, the results of plant regeneration by inducing somatic embryogenesis from the aged tree of centennial bamboo have not yet been reported. Therefore, the present inventor intends to provide a method for mass propagation of the aged pine tree by inducing somatic embryogenesis tissues from the leaves and petioles of the grafted pine seedlings, which has been difficult to cultivate in the past so far.

<References>

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Bodhipadma K, Leung DWM (2002) Factors important for somatic embryogenesis in zygotic embryo explants of Capsicum annuum L. J Plant Biol 45 (1): 49-55

Chalupa V (2000) In vitro propagation of mature trees of peduncle oak ( Quercus robur L.). J Forest Sci 46 (12): 537-542

Capuana M, Debergh PC (1997) Improvement of the maturation and germination of horse chestnut somatic embryos. Plant Cell Tiss Org Cult 48: 23-29

Dunstan DI et al. 1995. Somatic embryogenesis in woody plants. In: TA Thorpe (eds.). In Vitro Embryogenesis in Plants. pp 471-538

Feher A., Taras P, Pasternak P, Dudits D (2003) Transition of somatic plant cells to an embryogenic state. Plant Cell Tiss Org Cult 74: 201-228

Bonga JM (2004) The effect of various culture media on the formation of embryo-like structures in cultures derived from explants taken from mature Larix deciduas . Plant Cell Tiss Org Cult 77: 43-48

Kim BK, Yi YS, Ahn JH (2002) Micropropagation of Kalopanax pictus (Thune.) Nakai by bud culture. Korean J Medicinal Crop Sci 10 (4): 249-252

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Moon HK, Kim SH, Kim BK (2002) Micropropagation of Kalopanax pictus Nakai via axillary bud culture. J Korean For Soc 91 (6): 775-780

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Moon HK, Park SY, Kim YW, Kim SH (2008) Somatic embryogenesis and plantlet production using rejuvenated tissues from serial grafting of a mature Kalopanax septemlobus tree. In Vitro Cell Dev Biol-Plant 44: 119-127

Moon HK, Lee HS, Paek KY, Park SY (2015) Osmotic stress and strong 2,4-D shock stimulate somatic-to-embryogenic transition in Kalopanax septemlobus (Thunb.) Koidz. Acta Physiol Plant 37: 1710 (On line first)

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Norstog K. 1965. Induction of apogamy in megagametophytes of Zamia integrifolia . Amer J Bot 52: 993

Park SY, Cho HM, Moon KK , Kim YW, Paek KY (2011) Genotype variation and aging effects on the embryogenic capability of Kalopanax septemlobus . Plant Cell Tissue Organ Cult 105 (2): 265-270

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Rao PS. 1965. In vitro induction of embryonal proliferation in Santalum album L. Phytomorphology

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Vendrame WA, Holliday CP, Merkle SA (2001) Clonal propagation of hybrid sweetgum ( Liquidambar styraciflua x L. formosana ) by somatic embryogenesis. Plant Cell Rep 20: 691-695

von Aderkas P, Bonga JM (2000) Influencing micropropagation and somatic embryogenesis in mature trees by manipulation of phase change, stress and culture environment. Tree Physiology 20: 921-928

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The object of the present invention is to provide a method of mass propagation of aged chickpea by inducing a somatic embryo using material of an aged plant species (about 700 years old), which is different from the conventional technology using a seedling of the present invention, secondly, The present invention provides a bamboo tree obtained by a mass propagation method.

The technical objects to be achieved by the present invention are not limited to the technical matters mentioned above, and other technical subjects which are not mentioned can be clearly understood by those skilled in the art from the description of the present invention .

In order to achieve the above object,

(a) inducing somatic embryogenesis after surface sterilization of fresh leaves and leaf blade slices of aged vinegary seedlings;

(b) culturing and inducing the induced somatic embryo formation tissue;

(c) inducing a somatic embryo in the proliferated somatic embryo-forming tissue;

(d) culturing the induced somatic embryo to induce germination and plant propagation.

The present invention aims at inducing somatic embryogenesis tissues from leaves and petioles of grafted seedlings, and maintaining and proliferating embryogenic calli, as a subject of the aged tree of the natural monument 305, which has been difficult to cultivate in the past until now, Through somatic embryo induction, maturation and germination processes, complete plants can be induced.

Based on these results, it is expected that the reproduction and restoration of the natural monument of the great conservation value will be reproduced and restored. In particular, it is possible to preserve the genital resources through the cryogenic storage of the embryogenic tissues, so that the extinct genetic resources can be propagated and preserved.

In addition, data of the present invention can be usefully utilized in the development of in-flight breeding techniques of hardwood species similar to other natural monumental horns, and it can be applied to applications of advanced biotechnology such as gene insertion using embryogenic cell lines.

Fig. 1 is a photograph of the aged neck (natural monument No. 305, about 700 years old) of the callus.
Fig. 2 is a photograph showing a shoot grown by attaching a callus root to a two-year-old female.
Fig. 3 is a photograph of a somatic embryo-derived tissue derived from a leaf of a callus grape seedling.
4 is a photograph of a somatic embryo induced in somatic embryogenesis tissue.
Fig. 5 is a photograph of a somatic embryo germinated and regenerated into a plant.
Fig. 6 is a photograph of a plant derived from a somatic embryo transferred to an artificial soil and purified.
Figure 7 is a photograph of a 2-year-old seedlings grown by transplanting seedlings purified in artificial soil into soil.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mass propagation of a dwarf aged neck through somatic embryo development,

(a) inducing somatic embryogenesis after surface sterilization of fresh leaves and leaf blade slices of aged vinegary seedlings;

(b) culturing and inducing the induced somatic embryo formation tissue;

(c) inducing a somatic embryo in the proliferated somatic embryo-forming tissue;

(d) culturing the induced somatic embryo to induce germination and plant.

Preferably, the shoot is a perennial plant.

Preferably, the surface of the section is sterilized by cutting the leaf and petiole into a 250 ml Erlenmeyer flask, adding Tween 20, washing with tap water, and then sterilizing 1) 70% Ethanol for 3 minutes, 2) immersed in a 2% (w / v) sodium hypochlorite (NaClO) solution to which Triton X-100 was added and sterilized for 15 minutes, 3) washed 5 times with sterilized distilled water . More preferably, the Triton X-100 is added in an amount of 0.01 to 0.05% to 2% (w / v) sodium hypochlorite (NaClO) solution. More preferably, the sterilization process 2) and 3) may be performed by using an alcohol lamp to warm up to about 40 to 50 ° C in order to increase the sterilizing effect and sterilize the surface.

The induction of the somatic embryogenesis tissue was carried out by cutting the leaves and petiole with a dissecting knife having a thickness of 1 mm or less to obtain 1.0 mg / L 2,4-D, 3% sucrose, 1 g / L L-glutamine and 0.2-0.5 (Murashige and Skoog, 1962) containing 10% gel light, and culturing for 4 to 16 weeks under conditions of dark culture.

The maintenance and proliferation of somatic embryogenesis tissues derived from the above was carried out in MS medium containing 1.0-2.0 mg / L 2,4-D, 2-5% sucrose, 1 g / L L-glutamine and 0.2-0.5% In a subculture period of 3 to 4 weeks.

The somatic embryo induction in the somatic embryogenesis tissue was cultured in 1 / 2MS medium containing 0.1 mg / L abscessic acid, 7% PEG-40000, 5% sucrose and 0.05% And inducing somatic embryogenesis.

The germination of the somatic embryo and the induction of the plant were carried out by the somatic embryo of torpedo stage embryo or early cotyledonary stage embryo induced by the method (c) (Murashige and Skoog, 1962) or 1 / 2MS medium supplemented with 0.5-1.0 mg / L gibberellic acid (GA ₃ ), 3% sucrose, 0.3% gelite .

In the mass propagation method of the present invention, the young plant derived by step (d) may be transplanted into an artificial soil to be purified, and transplanted into a forage to produce a seedling.

Purification of the juvenile plant is accomplished by carefully removing the plant from the medium, washing the gel light with water, and transplanting it in artificial soil (peatmoss: perlite: vermiculite 1: 1: 1 v / v / v) And purifying in a holding purification chamber.

In the mass propagation method of the old-timber tree according to the present invention, the old timber tree may be one which is a callus tree.

The present invention provides a bamboo tree propagated by the mass propagation method of the above-mentioned bamboo aged neck.

The present invention relates to a method for efficiently in-flight breeding of a natural monument No. 305, No. 305, which comprises the steps of: (1) confirming the conditions of the proper medium and growth regulator for inducing somatic embryogenesis, (GA3) on the somatic embryo maturation, germination and plant regeneration through the maintenance and proliferation of tissues, and ( ₄ ) the growth of the regenerated young plants through soil purification and seedling transplantation And the conditions were investigated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that the scope of the present invention is not limited to the embodiments described below. Do not.

Example 1. Extraction of sections

Seedlings of natural monuments No. 305, Kunwon Kwon, were used as the cuts. They were harvested from the greenhouse in March 2012 when the shoots were grown to about 5 cm. The stem was transferred to the laboratory immediately after harvesting and placed in a medium prepared after surface sterilization.

Example 2. Surface sterilization for culture

Surface sterilization was carried out by a general method of plant tissue culture. In the present invention, lobes and petioles were placed in a 250 ml Erlenmeyer flask, and they were thoroughly rinsed by shaking with tap water containing 0.03% Tween 20, and then completely rinsed.

1) The sections were immersed in 70% ethanol for 3 minutes, followed by ethanol, 2) transferred to a 2% NaClO solution containing 0.03% Triton X-100, sterilized for 15 minutes, and finally sterilized And washed five times with distilled water.

In order to increase the sterilization effect, sterilization was carried out with the alcohol lamp heated to 40 ~ 50 ℃ with shaking in 2) and 3) above.

After surface sterilization, it is washed 5 times with sterilized distilled water, and then immersed in sterilized distilled water for 30 minutes or more. Under a microscope, a sharp dissection knife is used to make a thin section with a thickness of 1 mm or less around the vein, ), And then cut directly into the prepared medium.

Example 3: Medium composition and preparation for inducing embryogenic tissue

As a medium for inducing somatic embryogenesis in leaf and petiole tissues, 4-5% sucrose was used as a carbon source and 0.3 ~ 10% sucrose was used as a carbon source, using MS medium (Murashige and Skoog, 1962) And treated with 0.5% gelrite.

L-glutamine (Sigma) was treated with amino acid 1,000 mg / L and treated with 1.0 mg / L or 2.0 mg / L 2,4-D (2,4-dichlorophenoxyacetic acid) alone as a plant growth regulator.

The acidity was adjusted to 5.8. When the temperature of the medium was cooled to about 50 ° C after the heat sterilization of the medium was finished, the L-glutamine was filtered and added separately. The medium was dispensed in an amount of 20 ml to a plastic Petri dish (Green Cross) Lt; / RTI &gt; overnight.

Example 4. Induction and proliferation of embryogenic tissue

There was no contamination from the sections after primary culture. After 2 weeks of cultivation, the incisors swelled slightly and callus formation started at the cut surface.

After 4 weeks of primary culture, the cells were transferred to the same medium of Example 3. After 8 weeks of primary culture, the cut pieces were changed and cut, and solid callus was induced from the cut surface.

Complete somatic embryogenesis was observed after 12 weeks of culture. In some of the most browned sections, a typical embryogenic callus of a light yellowish, fragile bark was induced.

As shown in Table 1 (induced somatic embryogenesis from the grafted seedlings of mature stems of callus), the induction frequency of embryogenic tissue was very low and was induced to 0.05 ~ 0.45% according to the section.

Meanwhile, the induced embryogenic tissue was subcultured in MS medium supplemented with 1,000 mg / L L-glutamine, 1.0 mg / L 2,4-D, 3% sucrose and 0.5% Lt; / RTI &gt; The culture was incubated in a darkness culture in a culture room maintained at a temperature of 25 ± 2 ° C.

Example 5 Induction of somatic embryo

To induce somatic embryogenesis from embryogenic tissues, 1 / 2MS medium, in which the amount of salt was halved, was added with 0.1 mg / mL of ABCA to the medium supplemented with 20 g / L sucrose, 0.02% activated carbon and 0.3% L treatment.

Approximately 0.5 g of embryogenic callus was transplanted into each disposable chary, and somatic embryos induced from the torpedo type to the early cotyledon were examined after 4 weeks of culture. Cultivation was carried out in a culture room under a temperature of 25 ± 2 ° C, 16 hours per day (40 μmol m ^-2 s ^-1 ).

Table 2 below shows the incidence of somatic embryo induction from the aged embryo-aged cells.

Example 6 Germination and Plant Formation of somatic embryo

Germination and plant formation were examined by treating 3% sucrose and 0.3% gelite in 1 / 2MS medium treated with gibberellic acid (GA ₃ ) by selecting embryos grown up to the initial cotyledon type in Example 5 above.

Gibberellic acid (GA ₃ ) was added to the medium by filtering and the regenerated young plants were subcultured in 1 / 2MS medium (10 × 5 cm culture bottle, 30 ml medium) to promote growth. Cultivation was carried out in a culture room under a temperature of 25 ± 2 ° C, 16 hours per day (40 μmol m ^-2 s ^-1 ).

Table 3 shows germination rate and plant regeneration rate of somatic embryos derived from embryogenic cells.

Example 7. Purification of soil transplantation and forage transplantation growth

In Example 6, germinated and regenerated young plants (about 7 to 10 cm or so) from the somatic embryo were removed from the culture container and gelled in the roots was carefully washed with tap water and transferred to an artificial soil.

Peat moss, perlite and vermiculite were mixed with equal volume ratios (1: 1: 1 v / v / v).

After the transplantation, the water was fully drained and refined by keeping the high humidity (90% or more) periodically in the purification room. The purification was carried out in a purifying chamber at a temperature of 25 ± 2 ° C, with 16 hours of illumination per day (20 μmol m ^-2 s ^-1 ). After 2 weeks of transplantation, the temperature was gradually lowered and adapted to the external environment. Purified seedlings were transplanted into the seedling to promote their growth.

Table 4 shows the transformation rates of soil transplants of plants regenerated from somatic embryos.

According to the present invention, the present invention suggests the conservation restoration and industrial utilization of useful forest resources that have been destroyed by the development of plant formation technology through the somatic embryogenesis of the aged pine trees. It is expected to be applicable to the cultivation of tree broadleaf trees and in-flight reproduction of rare and endangered plants.

Claims (11)

(a) inducing somatic embryogenesis after surface sterilization of fresh leaves and leaf blade pieces of the grafted seedlings of old age of the beech;
(b) culturing and inducing the induced somatic embryo formation tissue;
(c) inducing a somatic embryo in the proliferated somatic embryo-forming tissue; And
(d) culturing the induced somatic embryo to induce germination and plant propagation. The method according to claim 1, wherein the shoot is a perennial plant. The surface-sterilization method of claim 1, wherein the surface of the leaf and petiole sections is washed with addition of Tween 20, immersed in 70% ethanol (EtOH), immersed in sodium hypochlorite (NaClO) solution to which Triton X- Sterilized, and then sterilized and washed with sterile distilled water. The method according to claim 1, wherein the somatic embryogenesis tissue is induced by cutting the surface-sterilized slice into thin flakes of 1 mm or less to obtain 1.0 to 2.0 mg / L 2,4-D, 2-5% sucrose, 1 g / And 0.2 ~ 0.5% gelite for 4 weeks to 16 weeks under the condition of culturing the cells with an MS culture medium. The method according to claim 1, wherein the somatic embryogenesis tissue is proliferated by culturing the somatic embryogenesis tissue in an amount of 1.0-2.0 mg / L 2,4-D, 2-5% sucrose, 1 g / L L-glutamine, 0.2-0.5% Wherein the culture medium is subcultured every 2 to 4 weeks under the condition of culturing the cells in an MS medium. The method according to claim 1, wherein the somatic embryo is induced by injecting somatic embryogenesis tissue in an amount of 0.01 to 0.05% activated carbon, 7% PEG-4000, 5% sucrose and 0.1 mg / Lt; RTI ID = 0.0 &gt; MS &lt; / RTI &gt; medium. The method according to claim 1, wherein the induction of the plant is carried out by culturing a somatic embryo in a 1 / 2MS medium or a 1 / 2MS basic medium containing 1.0-10.0 mg / L gibberellic acid, 3% sucrose, 0.1-0.4% A method of mass propagation of the aged neck of a beech. [2] The method according to claim 1, wherein the plant derived from step (d) is transplanted into an artificial soil to be purified, and transplanted into a forage to produce a seedling. [9] The method according to claim 8, wherein plant purification is carried out by implanting the plant into an artificial soil and maintaining a high humidity of 90% or more in a purification chamber at a temperature of 25 占 폚 and a light intensity of 20 占 퐉 m ^-2 s ^{-1 for} 16 hours per day To thereby purify the plant. [2] The method according to claim 1, wherein the bamboo is a callus. 10. A bamboo plant propagated by the method of any one of claims 1 to 10.

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