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Regeneration of transgenic citrus plants from the trimmed shoot/root region of etiolated seedlings

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Biologia Plantarum

Abstract

Transformation and high efficient regeneration of transgenic plants from the trimmed etiolated shoot/root region (TESRR) of Anliucheng sweet orange [Citrus sinensis (L.) Osb.] seedling was reported. A visual green fluorescent protein (GFP) marker gene was introduced to evaluate transformation efficiency by using the explants from TESRR and epicotyls. The transformation protocol was: infection 20 min, co-culture 3 d, selection culture 30 d, and rooting 15 d. Out of a total of 288 sprouted shoots obtained from TESRR, 34 shoots (11.8 %) yielded GFP expression. In contrast, only 2 (3.0 %) of the 67 sprouted shoots from epicotyl transformation yielded GFP expression. In all plants showing the green fluorescence an expected 500 bp GFP fragment was proved by PCR analysis. Southern blot analysis further confirmed the integration of GFP gene into citrus genome. Transgenic plantlets were obtained within 80 d using the TESRR, compared within 150 d by using epicotyls.

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Abbreviations

TESRR:

trimmed etiolated shoot/root region

AS:

acetosyringone

BA:

6-benzyladenine

GFP:

green fluorescent protein

GUS:

β-glucuronidase

IBA:

indole butyric acid

KIN:

kinetin

MT medium:

Murashige and Tucker (1969) medium

NAA:

α-napthaleneacetic acid

NPT II:

neomycin phosphotransferase II

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Correspondence to W. W. Guo.

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Acknowledgements: This research was financially supported by the national NSF of China, the Ministry of Education (20060504014), the National 863 project of China (2007AA10Z182), and the NSF of Hubei province of China (2008CDA069).

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Li, D.L., Tan, B., Duan, Y.X. et al. Regeneration of transgenic citrus plants from the trimmed shoot/root region of etiolated seedlings. Biol Plant 53, 578–582 (2009). https://doi.org/10.1007/s10535-009-0105-0

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  • DOI: https://doi.org/10.1007/s10535-009-0105-0

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