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Transcriptome analysis revealed the role of moderate exogenous methyl jasmonate treatments in enhancing the metabolic pathway of L-borneol in the Blumea balsamifera

文献类型： 外文期刊

作者： Guan, Lingliang 1 ; Lin, Na 3 ; Wan, Lingyun 4 ; Yu, Fulai 1 ; Chen, Xiaolu 1 ; Xie, Xiaoli 1 ; Yuan, Chao 1 ; Soaud, Salma A. 5 ; Abd Elhamid, Mohamed A. 5 ; Heakel, Rania M. Y. 5 ; Wang, Linghui 3 ; El-Sappah, Ahmed H. 3 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Biol & Cultivat Herb Med Haikou, Haikou, Peoples R China

3.Yibin Univ, Sch Agr Forestry & Food Engn, Yibin, Peoples R China

4.Guangxi Bot Garden Med Plants, Guangxi Key Lab High Qual Format & Utilizat Dao Di, Nanning, Peoples R China

5.Zagazig Univ, Fac Agr, Genet Dept, Zagazig, Egypt

关键词： Ainaxiang; cytoplasmic mevalonate; exogenous treatment; RNA sequencing; geranyl diphosphate

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.1； 五年影响因子：5.3 ）

ISSN： 1664-462X

年卷期： 2024 年 15 卷

页码：

收录情况： SCI

摘要： Introduction: Blumea balsamifera L. (Ainaxiang) DC. is a perennial herb of the compositae family. It is also the primary source of natural borneol. Endo-borneol, the principal medical active element in B. balsamifera, is anti-inflammatory, antioxidant, and analgesic; enhances medicine absorption; refreshes; and is used as a spice and in cosmetic. Industrialization of B. balsamifera is limited by its low L-borneol concentration. Thus, understanding the accumulation pattern of the secondary metabolite endo-borneol and its synthesis process in secondary metabolism is critical for increasing B. balsamifera active ingredient content and cultivation efficiency. Methods: In this work, B. balsamifera was treated with varying concentrations (1.00 and 10.00 mmol/L) of methyl jasmonate (MeJA) as an exogenous foliar activator. The physiological parameters and L-borneol concentration were then assessed. Transcriptome sequencing of B. balsamifera-induced leaves was used to identify key genes for monoterpene synthesis. Results: The treatment effect of 1 mmol/L MeJA was the best, and the leaves of all three leaf positions accumulated the highest L-borneol after 120 h, correspondingly 3.043 mgg(-1) FW, 3.346 mgg(-1) FW, and 2.044 mgg(-1) FW, with significant differences from the control. The main assembly produced 509,285 transcripts with min and max lengths of 201 and 23,172, respectively. DEG analysis employing volcano blots revealed 593, 224, 612, 2,405, 1,353, and 921 upregulated genes and 4, 123, 573, 1,745, 766, and 763 downregulated genes in the treatments D1_1vsCK, D1_10vsCK, D2_1vsCK, D2_10vsCK, D5_1vsCK, and D5_10vsCK. Interestingly, when exposed to MeJA treatments, the MEP pathway's unigenes express themselves more than those of the MVA route. Finally, when treated with 1 mmol/L, the genes DXR, DXS, and GPS showed increased expression over time. At the same time, a 10 mmol/L therapy resulted in elevated levels of ispH and GGPS. Discussion: Our preliminary research indicates that exogenous phytohormones can raise the level of L borneol in B. balsamifera (L.) DC when given in the appropriate amounts. The most significant discovery made while analyzing the effects of different hormones and concentrations on B. balsamifera (L.) DC was the effect of 1 mmol/L MeJA treatment.

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