1
|
Romadanova NV, Tolegen AB, Kushnarenko SV, Zholdybayeva EV, Bettoni JC. Effect of Plant Preservative Mixture TM on Endophytic Bacteria Eradication from In Vitro-Grown Apple Shoots. PLANTS (BASEL, SWITZERLAND) 2022; 11:2624. [PMID: 36235489 PMCID: PMC9572907 DOI: 10.3390/plants11192624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 09/29/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Endophytic contaminants are a common problem for the in vitro propagation of woody plants and have significant economic repercussions for the conservation of plant genetic resources and commercial micropropagation. In this study, first, the microbial contamination that appeared around the base of in vitro-grown apple shoots was identified as Bacillus megaterium. Then, plant preservative mixture (PPMTM) was used as a bactericidal agent in plant tissue culture. Its efficacy for eradicating endophytic B. megaterium in in vitro cultures of apple was tested. In vitro-contaminated shoots were grown in tissue culture medium supplemented with 0.2% v/v PPMTM for 12 weeks and then transferred to medium without any PPMTM and cultured for 24 weeks. This study showed that PPMTM is an effective agent for controlling the growth of B. megaterium. Our results highlight the species-specific response of apple shoots to PPMTM. PPMTM was effective in controlling endogenous microbial contaminations from apple varieties 'Golden Delicious', 'Landsberger Renette', 'Suislepper', and 'Aport krovavo-krasnyi'; meanwhile, in 'KG 7' and 'Gold Rush', all the plants grown in the absence of PPMTM were still bacterially contaminated, even though they were pre-treated for 12 weeks in PPMTM-supplemented medium. These results therefore suggest the essentiality of further testing of extended incubation of PPMTM in these cultivars that had outbreaks of bacterial contamination.
Collapse
Affiliation(s)
- Natalya V. Romadanova
- Institute of Plant Biology and Biotechnology, 45 Timiryazev St., Almaty 050040, Kazakhstan
- Department of Molecular Biology and Genetics, Al-Farabi Kazakh National University, Al-Farabi Av. 71, Almaty 050040, Kazakhstan
| | - Arman B. Tolegen
- Institute of Plant Biology and Biotechnology, 45 Timiryazev St., Almaty 050040, Kazakhstan
- Department of Molecular Biology and Genetics, Al-Farabi Kazakh National University, Al-Farabi Av. 71, Almaty 050040, Kazakhstan
| | | | - Elena V. Zholdybayeva
- National Center for Biotechnology, 13/5 Kurgalzhynskoye Road, Nur-Sultan 010000, Kazakhstan
| | - Jean Carlos Bettoni
- The New Zealand Institute for Plant and Food Research Limited, Batchelar Road, Palmerston North 4410, New Zealand
| |
Collapse
|
2
|
Gu M, Li Y, Jiang H, Zhang S, Que Q, Chen X, Zhou W. Efficient In Vitro Sterilization and Propagation from Stem Segment Explants of Cnidoscolus aconitifolius (Mill.) I.M. Johnst, a Multipurpose Woody Plant. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11151937. [PMID: 35893641 PMCID: PMC9332613 DOI: 10.3390/plants11151937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 07/14/2022] [Accepted: 07/23/2022] [Indexed: 05/11/2023]
Abstract
Cnidoscolus aconitifolius (Mill.) I.M. Johnst is a multipurpose woody plant. In this study, an in vitro efficient propagation system of stem segment explants derived from field-grown C. aconitifolius plants was established for the first time. The sterilization effect, axillary bud initiation, and proliferation efficiency of stem segments were evaluated. The results showed that the sterilization time of 0.1% mercuric chloride, the concentration of Plant Preservative Mixture (PPM), the pretreatment method, and the sampling season had significant effects on the sterilization of stem segments (p < 0.05). The type of medium and plant growth regulators (PGRs) affected the initiation of axillary buds, and the proliferation efficiency was significantly affected by PGRs. The results showed that the best sterilization method for stem segment explants was as follows: a pretreatment by rinsing with running water for 120 min, soaking in 75% ethanol for 50 s, soaking in 0.1% mercuric chloride for 10 min, and medium supplemented with 3 mL/L PPM. When inoculated on the medium in spring, the contamination rate was as low as 25.56%. The optimal initiation medium for axillary buds in stem segments was half-strength Murashige and Skoog (1/2 MS) medium supplemented with 0.5 mg/L 6-benzyladenine (6-BA). The induction rate was as high as 93.33%, and the mean length of axillary buds was 2.47 cm. The optimal proliferation medium was 1/2 MS medium supplemented with 4.0 mg/L 6-BA and 0.2 mg/L indole-3-butyric acid (IBA). The induction rate was up to 80.00%, the total proliferation coefficient was 4.56, and the net proliferation coefficient was 5.69. The 1/2 MS medium supplemented with 0.1 mg/L 6-BA and 1.5 mg/L indole-3-acetic acid (IAA) was most conducive to the elongation of the adventitious shoot, and the adventitious shoot of approximately 1 cm reached 1.93 cm after culturing for 14 days. The best medium for adventitious shoot rooting was 1/2 MS medium supplemented with 0.1 mg/L α-naphthalene acetic acid (NAA), the highest rooting rate was 82.00%, and the survival rate of transplanting was over 90%.
Collapse
Affiliation(s)
- Min Gu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (M.G.); (Y.L.); (H.J.); (S.Z.); (Q.Q.)
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
- Guangdong Province Research Center of Woody Forage Engineering Technology, Guangzhou 510642, China
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
| | - Youli Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (M.G.); (Y.L.); (H.J.); (S.Z.); (Q.Q.)
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
- Guangdong Province Research Center of Woody Forage Engineering Technology, Guangzhou 510642, China
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
| | - Huier Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (M.G.); (Y.L.); (H.J.); (S.Z.); (Q.Q.)
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
- Guangdong Province Research Center of Woody Forage Engineering Technology, Guangzhou 510642, China
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
| | - Shihu Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (M.G.); (Y.L.); (H.J.); (S.Z.); (Q.Q.)
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
- Guangdong Province Research Center of Woody Forage Engineering Technology, Guangzhou 510642, China
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
| | - Qingmin Que
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (M.G.); (Y.L.); (H.J.); (S.Z.); (Q.Q.)
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
- Guangdong Province Research Center of Woody Forage Engineering Technology, Guangzhou 510642, China
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
| | - Xiaoyang Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (M.G.); (Y.L.); (H.J.); (S.Z.); (Q.Q.)
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
- Correspondence: (X.C.); (W.Z.)
| | - Wei Zhou
- Guangdong Province Research Center of Woody Forage Engineering Technology, Guangzhou 510642, China
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
- Correspondence: (X.C.); (W.Z.)
| |
Collapse
|