文献类型： 外文期刊

作者： Xu, Min ¹ ; Gao, Qiang ¹ ; Jiang, Mengwei ² ; Wang, Wenling ² ; Hu, Juan ² ; Chang, Xiaojun ² ; Liu, Dinggao ² ; Liang, Yuwei ¹ ; Jiang, Yifan ³ ; Chen, Fei ⁴ ; Li, Chuhao ⁵ ; Huang, Haoran ⁵ ; Chen, Feng ⁷ ; Li, Fan ⁸ ; Trigiano, Robert N. ⁹ ; Wang, Jihua ⁸ ; Jiao, Chen ¹ ; Zhou, Xiaofan ⁵ ; Zhang, Liangsheng ¹ ;

作者机构： 1.Zhejiang Univ, Coll Agr & Biotechnol, Genom & Genet Engn Lab Ornamental Plants, Hangzhou 310058, Peoples R China

2.Fujian Agr & Forestry Univ, Coll Hort, Fujian Prov Key Lab Haixia Appl Plant Syst Biol, Fuzhou 350002, Peoples R China

3.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Peoples R China

4.Hainan Univ, Coll Trop Crops, Haikou 570228, Peoples R China

5.South China Agr Univ, Integrat Microbiol Res Ctr, Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China

6.South China Agr Univ, Guangdong Prov Key Lab Microbial Signals & Dis Con, Guangzhou 510642, Peoples R China

7.Univ Tennessee, Dept Plant Sci, Knoxville, TN 37996 USA

8.Yunnan Acad Agr Sci, Floriculture Res Inst, Natl Engn Res Ctr Ornamental Hort, Key Lab Flower Breeding Yunnan Prov, Kunming 650205, Peoples R China

9.Univ Tennessee, Dept Entomol & Plant Pathol, Knoxville, TN 37996 USA

10.Zhejiang Univ, Hainan Inst, Sanya 572025, Peoples R China

关键词： Biosynthesis; consensus genome; consumption; fragrance; hormones; jasmonate

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：7.298； 五年影响因子：8.291 ）

ISSN： 0022-0957

年卷期：

页码：

收录情况： SCI

摘要： Jasminum sambac is a well-known plant for its attractive and exceptional fragrance, the flowers of which are used to produce scented tea. Jasmonate (JA), an important plant hormone was first identified in Jasminum species. Jasmine plants contain abundant JA naturally, of which the molecular mechanisms of synthesis and accumulation are not clearly understood. Here, we report a telomere-to-telomere consensus assembly of a double-petal J. sambac genome along with two haplotype-resolved genomes. We found that gain-and-loss, positive selection, and allelic specific expression of aromatic volatile-related genes contributed to the stronger flower fragrance in double-petal J. sambac compared with single- and multi-petal jasmines. Through comprehensive comparative genomic, transcriptomic, and metabolomic analyses of double-petal J. sambac, we revealed the genetic basis of the production of aromatic volatiles and salicylic acid (SA), and the accumulation of JA under non-stress conditions. We identified several key genes associated with JA biosynthesis, and their non-stress related activities lead to extraordinarily high concentrations of JA in tissues. High JA synthesis coupled with low degradation in J. sambac results in accumulation of high JA under typical environmental conditions, similar to the accumulation mechanism of SA. This study offers important insights into the biology of J. sambac, and provides valuable genomic resources for further utilization of natural products. High jasmonate (JA) synthesis coupled with low degradation in Jasminum sambacresults in high accumulation of JA under typical environmental conditions