Identification of Differentially Expressed Genes in Sweetpotato Storage Roots Between Kokei No. 14 and Its Mutant Nongdafu 14 Using PCR-Based cDNA Subtraction

Wei Chen, Hong Zhai, Yuan jun Yang, Shao zhen He, De gao Liu, Qing chang Liu

Research output: Contribution to journalArticlepeer-review

Abstract

The contents of carotenoids in the storage root of sweetpotato, Ipomoea batatas (L.) Lam. vary dramatically among different cultivars. However, so far little is known about the regulation of carotenoids synthesis in sweetpotato. In our laboratory, we identified a novel sweetpotato mutant, Nongdafu 14, which is a homogenous mutant derived from the wild type Kokei No. 14. The contents of carotenoids in the storage root of Nongdafu 14 were analyzed using high performance liquid chromatography (HPLC), and it was found that the amount of carotenoids, b-carotene, lutein and zeaxantion, three major types of carotenoids in sweetpotato storage roots, increased 2-26 folds in Nongdafu 14 compared to Kokei No. 14. Suppression subtractive hybridization (SSH) was used to identify genes that were differentially expressed in Nongdafu 14, and a differentially expressed cDNA library was constructed using the cDNA of Nongdafu 14 storage roots as tester and that of Kokei No. 14 storage roots as driver. Out of the 1 530 clones sequenced, we identified 292 nonredundant ESTs. GO and KEGG analyses of these differentially expressed ESTs indicated that diverse metabolism pathways were affected and candidate genes involved in regulation of carotenoids synthesis are suggested.

Original languageEnglish (US)
Pages (from-to)589-595
Number of pages7
JournalJournal of Integrative Agriculture
Volume12
Issue number4
DOIs
StatePublished - Apr 2013
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the China Agriculture Research System (CARS-11), the HarvestPlus Challenge Program, and the National High-Tech Research and Development Project of China (2011AA100607).

Keywords

  • Carotenoids
  • Differentially expressed ESTs
  • Ipomoea batatas (L.) Lam.
  • Suppression subtractive hybridization

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