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| 1 | Plant-Derived Enzymes Producing Chiral Aroma Compounds and Potential Application显示文摘Aroma(volatile)compounds play important ecological functions in plants,and also contribute to the quality of plant-derived foods.Moreover,chiral aroma compounds affect their functions in plants and lead to different flavor quality properties.Formations of chiral aroma compounds are due to the presence of enzymes producing these compounds in plants,which are generally involved in the final biosynthetic step of the aroma compounds.Here,we review recent progress in research on the plant-derived enzymes producing chiral aroma compounds,and their changes in response to environmental factors.The chiral aroma enzymes that have been reported produce(R)-linalool,(S)-linalool,(R)-limonene,and(S)-limonene,etc.,and these enzymes are found in various plant species.We also discuss the origins of enantioselectivity in the plant-derived enzymes producing chiral aroma compounds and summarize the potential use of plants containing enzymes producing chiral aroma compounds for producing chiral flavors/fragrances. | Fang Dong Qian Fan Xinguo Su Lanting Zeng | 2023 | Phyton-International Journal of Experimental Botany2023，92，2： | 1 |
| 2 | Feasible strategies for studying the involvement of DNA methylation and histone acetylation in the stress-induced formation of quality-related metabolites in tea(Camellia sinensis)显示文摘Tea plants are subjected to multiple stresses during growth,development,and postharvest processing,which affects levels of secondary metabolites in leaves and influences tea functional properties and quality.Most studies on secondary metabolism in tea have focused on gene,protein,and metabolite levels,whereas upstream regulatory mechanisms remain unclear.In this review,we exemplify DNA methylation and histone acetylation,summarize the important regulatory effects that epigenetic modifications have on plant secondary metabolism,and discuss feasible research strategies to elucidate the underlying specific epigenetic mechanisms of secondary metabolism regulation in tea.This information will help researchers investigate the epigenetic regulation of secondary metabolism in tea,providing key epigenetic data that can be used for future tea genetic breeding. | Jie Yang Dachuan Gu Shuhua Wu Xiaochen Zhou Jiaming Chen Yinyin Liao Lanting Zeng Ziyin Yang | 2021 | Horticulture Research2021，8，1： | 1 |
| 3 | Enrichment of denitrifying anaerobic methane oxidizing microorganisms显示文摘 | Hu S Zeng RJ Burow LC Lant P Keller J Yuan Z | | 0，，5： | 1 |
| 4 | Effect of nitrate and nitrite on the selection of microorganisms in the denitrifying anaerobic methane oxidation process显示文摘 | Hu S Zeng RJ Keller J Lant PA Yuan Z | | 0，，3： | 1 |
| 5 | Effect of the biosynthesis of the volatile compound phenylacetaldehyde on chloroplast modifications in tea (Camellia sinensis) plants显示文摘Plant volatile compounds have important physiological and ecological functions.Phenylacetaldehyde(PAld),a volatile phenylpropanoid/benzenoid,accumulates in the leaves of tea(Camellia sinensis)plants grown under continuous shading.This study was conducted to determine whether PAld production is correlated with light and to elucidate the physiological functions of PAld in tea plants.Specifically,the upstream mechanism modulating PAld biosynthesis in tea plants under different light conditions as well as the effects of PAld on chloroplast/chlorophyll were investigated.The biosynthesis of PAld was inhibited under light,whereas it was induced in darkness.The structural gene encoding aromatic amino acid aminotransferase 1(CsAAAT1)was expressed at a high level in darkness,consistent with its importance for PAld accumulation.Additionally,the results of a transcriptional activation assay and an electrophoretic mobility shift assay indicated CsAAAT1 expression was slightly activated by phytochrome-interacting factor 3-2(CsPIF3-2),which is a light-responsive transcription factor.Furthermore,PAld might promote the excitation of chlorophyll in dark-treated chloroplasts and mediate electron energy transfer in cells.However,the accumulated PAld can degrade chloroplasts and chlorophyll,with potentially detrimental effects on photosynthesis.Moreover,PAld biosynthesis is inhibited in tea leaves by red and blue light,thereby decreasing the adverse effects of PAld on chloroplasts during daytime.In conclusion,the regulated biosynthesis of PAld in tea plants under light and in darkness leads to chloroplast modifications.The results of this study have expanded our understanding of the biosynthesis and functions of volatile phenylpropanoids/benzenoids in tea leaves. | Lanting Zeng Xiaochen Zhou Xiumin Fu Yilong Hu Dachuan Gu Xingliang Hou Fang Dong Ziyin Yang | 2023 | Horticulture Research2023，10，3： | 0 |
| 6 | Role of histone deacetylase CsHDA8 in regulating the accumulation of indole during the oolong tea manufacturing process显示文摘Aroma is an important quality-related trait of oolong tea.The compounds contributing to oolong tea aromas are mainly produced in response to stress during the enzyme-active stage of the tea manufacturing process.Epigenetic regulation affects stress-induced secondary metabolite production;however,the mechanisms regulating oolong tea aroma compound formation are unclear.In this study,the effect of histone acetylation on indole formation,an important aroma of oolong tea,was revealed and CsHDA8 was identified as a candidate regulator.Additionally,CsHDA8,which was localized in the nucleus and cytoplasm,may function as a histone deacetylase.Moreover,the binding of CsHDA8 to CsTSB2 promoter related to indole decreased during a wounding treatment,which resulted in increased histone acetylation and gene expression.The study results may clarify the regulatory effects of histone acetylation on the formation of tea secondary metabolites,with potential implications for studies on the epigenetic regulation in other non-model horticulture plants. | Xiaochen Zhou Jie Yang Guotai Jian Lanting Zeng Dachuan Gu Xinguo Su Ziyin Yang | 2022 | Beverage Plant Research2022，2，1： | 0 |
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