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Zhang W, Li J, Dong Y, Huang Y, Qi Y, Bai H, Li H, Shi L. Genome-wide identification and expression of BAHD acyltransferase gene family shed novel insights into the regulation of linalyl acetate and lavandulyl acetate in lavender. JOURNAL OF PLANT PHYSIOLOGY 2024; 292:154143. [PMID: 38064887 DOI: 10.1016/j.jplph.2023.154143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 02/10/2024]
Abstract
The BAHD acyltransferase superfamily has a variety of biological functions, especially in catalyzing the synthesis of ester compounds and improving plant stress resistance. Linalyl acetate and lavandulyl acetate, the most important volatile esters in lavender, are generated by LaBAHDs. However, the systematic identification, expression characteristics of LaBAHD genes and their correlations with ester formation remain elusive. Here, 166 LaBAHD genes were identified from the lavender genome. Based on detailed phylogenetic analysis, the LaBAHD family genes were divided into five groups, among which the LaBAHDs involved in volatile ester biosynthesis belong to the IIIa and Va clades. Whole-genome duplications (WGDs) and tandem duplications (TDs) jointly drive the expansion of LaBAHD superfamily. The promoter regions of LaBAHDs contained a variety of stress- and hormone-related motifs, as well as binding sites with five types of transcription factors (TFs). Then, linalyl acetate- and lavandulyl acetate-regulated coexpression modules were established and some candidate TFs that may function in inducing ester formation were identified. Based on the correlation analysis between the ester contents and expression profiles of BAHD genes in different tissues, five candidate genes were screened for further examination. Drought, salt and MeJA treatments increased the accumulation of linalyl acetate and lavandulyl acetate, and induced the expression of LaBAHDs. Our results indicated that LaBAHD57, LaBAHD63, LaBAHD104, LaBAHD105 and LaBAHD119 are crucial candidate genes involved in linalyl acetate and lavandulyl acetate biosynthesis. Our findings offer a theoretical foundation for further studying the specific biological functions of LaBAHD family and improving the quality of lavender essential oil.
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Affiliation(s)
- Wenying Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jingrui Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China.
| | - Yanmei Dong
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China.
| | - Yeqin Huang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Yue Qi
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Hongtong Bai
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China.
| | - Hui Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China.
| | - Lei Shi
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 00093, China; China National Botanical Garden, Beijing, 100093, China.
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