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Shoot proliferation, embryogenic callus induction, and plant regeneration in Lepturus repens (G. Forst.) R. Br.

  • Plant Tissue Culture
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Abstract

Lepturus repens (G. Forst.) R. Br. is a perennial grass that grows on coral reef outcrops and sandy beaches and has drought tolerance and salt resistance. In this study, the internodes of L. repens were used as explants and cultured on Murashige and Skoog (MS) medium supplemented with 1.13 mg L−1 6-benzyladenine (BA) to successfully induce axillary shoots. Additional experimental results showed that cytokinins were a key factor for the successful induction and proliferation of shoots. BA induced 7.2 axillary shoots per explant, significantly more than kinetin (KIN), which induced 3.5 axillary shoots per explant. Shoots were proliferated more successfully on medium supplemented with 1.13 mg L−1 BA and a low concentration of 0.09 mg L−1 1-naphthaleneacetic acid (NAA) than BA alone. Shoot bases were used as explants for embryogenic callus induction and subsequent plant regeneration, which was possible on MS medium supplemented with 0.11 mg L−1 2,4-D, 0.09 mg L−1 NAA, and 0.22 mg L−1 TDZ. Separately, callus differentiated into adventitious shoot buds on MS medium containing 1.13 mg L−1 BA or 1.10 mg L−1 KIN singly or combined with 0.09 mg L−1 NAA. On MS medium without plant growth regulators (PGR-free) or only containing 0.09 mg L−1 NAA, callus induced both adventitious shoots and somatic embryos that developed a radical on PGR-free medium. All shoots formed roots on ½MS medium containing a low concentration (0.19 to 0.37 mg L−1) of NAA or IBA within 20 d. The survival percentage of plantlets with 3 to 4 shoot clusters exceeded 99% on a substrate consisting of yellow mud, organic fertilizer, and perlite (10:3:1, v:v:v). After transplanting, plantlets with one or two shoot clusters showed 68 to 86% survival within 1 mo.

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All data generated or analyzed during this study are included in this article.

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Funding

This work was financially supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA13020500), the NSFC-Guangdong Province Union Funds (U1701246), and the Guangdong Science and Technology Program (2019B121201005).

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Author notes

  1. Yuping Xiong and Zhenpeng Wei contributed equally to this work.

Authors and Affiliations

  1. Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, The Chinese Academy of Sciences, Guangzhou, 510650, China

    Yuping Xiong, Zhenpeng Wei, Xincheng Yu, Jinhui Pang, Ting Zhang, Kunlin Wu, Hai Ren, Shuguang Jian & Guohua Ma

  2. Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, Guangdong, China

    Zhenpeng Wei

  3. University of Chinese Academy of Sciences, Beijing, 100039, China

    Xincheng Yu, Jinhui Pang & Ting Zhang

  4. P.O. Box 7, Miki-cho, Ikenobe 3011-2, Kagawa-ken, 761-0799, Japan

    Jaime A. Teixeira da Silva

Authors
  1. Yuping Xiong
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  2. Zhenpeng Wei
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  9. Jaime A. Teixeira da Silva
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Contributions

YPX, ZPW, XCY, JHY, TZ, KLW, HR, SGJ, JATdS, and GHM designed the experiment and provided guidance for the study. SYC and XCY prepared samples for all analyses. YPX and JHP performed statistical analyses. YPX, GHM, and JATdS co-wrote and edited the manuscript. JATdS and GHM interpreted the data and experimental results. All authors read and approved the manuscript for publication.

Corresponding author

Correspondence to Guohua Ma.

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The authors declare no competing interests.

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Editor: Masaru Nakano

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Xiong, Y., Wei, Z., Yu, X. et al. Shoot proliferation, embryogenic callus induction, and plant regeneration in Lepturus repens (G. Forst.) R. Br.. In Vitro Cell.Dev.Biol.-Plant 57, 1031–1039 (2021). https://doi.org/10.1007/s11627-021-10183-3

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  • DOI: https://doi.org/10.1007/s11627-021-10183-3

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