Comparison of Different Methods for RNA Extraction from Floral Buds of Tree Peony (<i>Paeonia suffruticosa</i> Andr.)

  • Yan GAO Shanghai Botanical Garden, No. 1111 Longwu Road, 200231 Shanghai
  • Guangqi ZHAO Shanghai Botanical Garden, No. 1111 Longwu Road, 200231 Shanghai
  • Changhua JIANG Shanghai Botanical Garden, No. 1111 Longwu Road, 200231 Shanghai
  • Yao SONG Shanghai Botanical Garden, No. 1111 Longwu Road, 200231 Shanghai
  • Kang YE Shanghai Botanical Garden, No. 1111 Longwu Road, 200231 Shanghai
  • Shucheng FENG Shanghai Botanical Garden, No. 1111 Longwu Road, 200231 Shanghai

Abstract

Tree peony (Paeonia suffruticosa Andr.), a species native to China, is one of the most important ornamental and medicinal plants. Like other tree species in temperate and boreal zones, the dormancy-activity transition of floral buds is critical for blooming time and fruit production. However, floral buds contain high levels of secondary metabolites, making the isolation of high quality RNA difficult. To obtain a method suitable for extracting RNA from floral buds of tree peony, we evaluated five different methods, including the cetyltrimethylammonium bromide (CTAB) and Sodium dodecyl sulfate (SDS)-based methods, a modified SDS-TRNzol protocol, and two commercial kits (TRNzol and Qiagen RNeasy Plant Mini Kit). The modified SDS-TRNzol method was capable of efficiently removing polyphenols and other metabolites in floral buds. The isolated RNA was of high purity and integrity, as demonstrated by the the A260/280 ratio of approximately 2.0, and RIN values of more than 9.0. Gel electrophoresis analysis indicated that the extracted RNA had clear 28S and 18S ribosomal RNA bands without DNA contamination. The RNA isolated by this protocol was successfully used for downstream manipulations, such as RT-PCR, RACE, and real-time PCR. Together, the modified SDS-TRNzol protocol is an easy, efficient, and highly reproducible method for RNA isolation from floral buds rich in secondary metabolites.

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Published
2016-12-14
How to Cite
GAO, Y., ZHAO, G., JIANG, C., SONG, Y., YE, K., & FENG, S. (2016). Comparison of Different Methods for RNA Extraction from Floral Buds of Tree Peony (<i>Paeonia suffruticosa</i&gt; Andr.). Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 44(2), 418-422. https://doi.org/10.15835/nbha44210402
Section
Research Articles