| Title: | Changes in volatile profile and related gene expression during senescence of tobacco leaves |
| Author(s): | Wen L; Cao J; Li W; Guo Y; |
| Address: | "Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: Volatile organic compounds are critical for food flavor and play important roles in plant-plant interactions and plants' communications with the environment. Tobacco is well-studied for secondary metabolism and most of the typical flavor substances in tobacco leaves are generated at the mature stage of leaf development. However, the changes in volatiles during leaf senescence are rarely studied. RESULTS: The volatile composition of tobacco leaves at different stages of senescence was characterized for the first time. Comparative volatile profiling of tobacco leaves at different stages was performed using solid-phase microextraction coupled with gas chromatography/mass spectrometry. In total, 45 volatile compounds were identified and quantified, including terpenoids, green leaf volatiles (GLVs), phenylpropanoids, Maillard reaction products, esters, and alkanes. Most of the volatile compounds showed differential accumulation during leaf senescence. Some terpenoids, including neophytadiene, beta-springene, and 6-methyl-5-hepten-2-one, increased significantly with the progress of leaf senescence. Hexanal and phenylacetaldehyde also showed increased accumulation in leaves during senescence. The results from gene expression profiling indicated that genes involved in metabolism of terpenoids, phenylpropanoids, and GLVs were differentially expressed during leaf yellowing. CONCLUSION: Dynamic changes in volatile compounds during tobacco leaf senescence are observed and the integration of gene-metabolites datasets offers important readouts for the genetic control of volatile production during the process of leaf senescence. (c) 2023 Society of Chemical Industry" |
| Keywords: | *Tobacco/genetics Plant Leaves/metabolism Plants/metabolism *Volatile Organic Compounds/metabolism Terpenes Gene Expression gene-metabolites herbivores leaf senescence tobacco volatile compounds; |
| Notes: | "MedlineWen, Lichao Cao, Jianmin Li, Wei Guo, Yongfeng eng ASTIP-TRIC02/Agricultural Science and Technology Innovation Program/ 2013ZL024/Fundamental Research Funds for Chinese Academy of Agricultural Sciences/ 31970204/National Natural Science Foundation of China/ England 2023/05/24 J Sci Food Agric. 2023 Oct; 103(13):6540-6552. doi: 10.1002/jsfa.12733. Epub 2023 Jun 13" |
