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Yu H, Li J, Chang X, Dong N, Chen B, Wang J, Zha L, Gui S. Genome-wide identification and expression profiling of the WRKY gene family reveals abiotic stress response mechanisms in Platycodon grandiflorus. Int J Biol Macromol 2024; 257:128617. [PMID: 38070802 DOI: 10.1016/j.ijbiomac.2023.128617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 11/30/2023] [Accepted: 12/02/2023] [Indexed: 01/26/2024]
Abstract
The WRKY family of transcription factors (TFs) is an important gene family involved in abiotic stress responses. Although the roles of WRKY TFs in plant abiotic stress responses are well studied, little is known about the stress-induced changes in WRKY family in Platycodon grandiflorus. 42 PgWRKY genes in seven subgroups were identified in the P. grandiflorus genome. The content of eight platycodins in P. grandiflorus was investigated under cold, heat, and drought stresses. Platycodin D levels significantly increased under three abiotic stresses, while the content changes of other platycodins varied. Transcriptome analysis showed that different WRKY family members exhibited varied expression patterns under different abiotic stresses. PgWRKY20, PgWRKY26, and PgWRKY39 were identified as three key candidates for temperature and drought stress responses, and were cloned and analysed for sequence characteristics, gene structure, subcellular localisation, and expression patterns. The RT-qPCR results showed that PgWRKY26 expression significantly increased after heat stress for 48 h, cold stress for 6 h, and drought stress for 2 d (DS_2 d). The PgWRKY39 expression level significantly increased at DS_2 d. This study provides a theoretical basis for clarifying the molecular mechanism of the abiotic stress responses of the WRKY gene family in P. grandiflorus.
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Affiliation(s)
- Hanwen Yu
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Jing Li
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Xiangwei Chang
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Nan Dong
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Bowen Chen
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Jutao Wang
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Liangping Zha
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Institute of Conservation and Development of Traditional Chinese Medicine Resources, Anhui Academy of Chinese Medicine, Hefei 230012, China; Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei 230012, China.
| | - Shuangying Gui
- College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China; Institute of Pharmaceutics, Anhui Academy of Chinese Medicine, Hefei, China; Anhui Province Key Laboratory of Pharmaceutical Technology and Application, Anhui University of Chinese Medicine, Hefei, China; MOE-Anhui Joint Collaborative Innovation Center for Quality Improvement of Anhui Genuine Chinese Medicinal Materials, Hefei, China.
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