rpc00068: Commelina communis TA416 callus culture

Note

  • Components

    • A 9-cm plastic Petri dish, containing cells placed on semi-solid medium

  • Notice

    • Subculture the cells to fresh medium immediately after arrival.

    • Do not store the cell culture in a refrigerator and a freezer.

    • Maintain aseptic conditions of the cell culture, and work in a laminar flow cabinet.

  • Method

    • Culture medium: MS medium, 0.25% (w/v) gellan gum, pH 5.7 (medium no. 44)

    • Culture conditions: 25°C, continuous light

    • Subculture: 28-day intervals

  • Citation of cell line

    When results obtained by using this cell line are published in a scientific journal, it should be cited in the following manner: “Commelina communis TA416 cell line (rpc00068) was provided by the RIKEN BRC through the National BioResource Project of the MEXT, Japan.”

Introduction

TA416 cell line was established from a hypocotyl of Commelina communis L. (Asano 2011 [1], Asano and Otobe 2011 [2]). The TA416 callus cells are dark blue and produce anthocyanin. The TA416 cells are grown on a phytohormone-free Murashige and Skoog (MS) medium solidified with 0.25% (w/v) gellan gum, pH 5.7. Our TA416 cell culture has been maintained under the continuous light at 25°C and subcultured at 28-day intervals.

Materials

Chemicals and stock solutions

(All stock solutions are stored at 4°C)

  • MS salt mix

    Murashige and Skoog Plant Salt Mixture, FUJIFILM Wako Pure Chemical Corporation (#392-00591)

  • Sucrose

  • MS_VT

    Chemical

    Concentration (mg/mL)

    Nicotinic acid

    0.5

    Pyridoxine·HCl

    0.5

    Thiamine·HCl

    0.1

    Glycine

    2

  • MS_inositol

    Chemical

    Concentration (mg/mL)

    myo-Inositol

    40

  • Gellan gum

    Gellan gum, FUJIFILM Wako Pure Chemical Corporation (#073-03071)

  • KOH (1 N)

Glassware and equipment

  • Erlenmeyer flask (200 mL), capped with two layers of aluminum foil

  • Forceps, sterilized before use

Preparation of MS medium (medium no. 44)

  1. Dissolve the following chemicals in approximately 800 mL of distilled water.

    Chemical

    Amount

    MS salt mix

    1 bag (1 L)

    Sucrose

    30 g

  2. Add following stock solutions, and fill up to approximately 950 mL with distilled water.

    Stock solution

    Volume (mL)

    MS_VT

    1

    MS_inositol

    2.5

  3. Adjust the pH of the solution to 5.7 with KOH (1 N), and fill up to 1 L with distilled water.

  4. Pour 60 mL of the medium into a 200-mL flask containing 0.15 g of gellan gum.

  5. Autoclave the flask at 121°C for 20 min.

Methods

  1. Pick up an appropriate amount of callus cells from a 28-day-old culture with a forceps and place the cells onto fresh MS medium.

  2. Incubate cell cultures under the continuous light condition (photosynthetic photon flux density 45–50 µmol m−2 s−1) at 25°C.

Notes

  • We send TA416 cells on semi-solid MS medium in a 9-cm disposable Petri dish. The cells should be subcultured to fresh MS medium immediately after arrival.

  • In order to maintain TA416 callus culture stably, it is essential to observe the growth of cells carefully. Because proliferation of TA416 cells is affected by culture conditions, such as a room temperature, aeration conditions of the culture and so on, an amount of cells transferred to fresh medium and the subculture intervals may vary from one lab to another. We usually inoculate nine pieces of TA416 callus (about 2–4-mm in diameter) on 60 mL of MS medium in a 200-mL flask, and culture them for 28 days.

  • TA416 callus cultures usually contain dark blue, violet, and white cell populations. Dark blue cells are the most suitable for subculture.

Genotyping

Maintenance history

References

Protocols