Abstract
A resveratrol synthase gene was cloned from the peanut plant (Arachis hypogaea) by RT-PCR and was transformed into purple sweet potato (Ipomoea batatas) by Agrobacterium-mediated transformation. Stem sections were infected with bacterial solution of OD600 = 0.4 for 20 min and then cocultured for 2 days. Infected explants were cultured on MS media containing 50 mg/l kanamycin, 0.02 mg/l NAA and 1 mg/l 6-BA for bud induction or containing 75 mg/l kanamycin, 1.0 mg/l NAA and 0.1 mg/l 6-BA for root formation. The bud and root induction rates were 37.5 and 25.0%, respectively. 105 regenerated plants were obtained, with 11 positive plants by PCR and Southern blotting analyses. A high level of resveratrol glucoside (340 μg/g dry weight), but no resveratrol, was detected in the transformed plants by HPLC. This study also provides a stable genetic transformation and plant regeneration method for metabolic modification of purple sweet potato.
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Abbreviations
- 6-BA:
-
6-Benzylaminopurine
- CaMV:
-
Cauliflower mosaic virus
- CHS:
-
Chalcone synthase
- CK:
-
Control
- CTAB:
-
Cetyl trimethylammonium bromide
- GUS:
-
β-Glucuronidase
- IPTG:
-
Isopropyl-β-d-thiogalactopyranoside
- KT:
-
Kinetin
- MS:
-
Murashige and Skoog medium
- NAA:
-
2,4-Dichlorophenoxyacetic acid
- RS:
-
Resveratrol synthase
- UV:
-
Ultra violet
- X-gluc:
-
5-Bromo-4-chloro-3-indolyl-β-d-glucuronide
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Acknowledgments
This work was supported by the Guangdong Provincial Science and Technology Programs (2006B20101005, 2011B020310008), Science and Technology Supporting Programs of Guangzhou Municipal Government (2008Z1-E591) and Panyu District Science, Technology Programs of Guangzhou City (2009-T-17-1) and Guangdong Natural Science Fund (program number 10151063101000002, S2011010003368), with all funds to H.-H. Li.
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Communicated by H. Jones.
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Pan, LP., Yu, SL., Chen, CJ. et al. Cloning a peanut resveratrol synthase gene and its expression in purple sweet potato. Plant Cell Rep 31, 121–131 (2012). https://doi.org/10.1007/s00299-011-1145-4
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DOI: https://doi.org/10.1007/s00299-011-1145-4