Sesquiterpene Synthases of Zanthoxylum ailanthoides : Sources of Unique Aromas of a Folklore Plant in Taiwan

is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile terpenes between prickly young and nonprickly mature leaves were identified and considered to be one of the sources of their aromas. A transcript...

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Published inJournal of agricultural and food chemistry Vol. 69; no. 42; pp. 12494 - 12504
Main Authors Chuang, Chun-Wei, Wen, Chi-Hsiang, Wu, Tsai-Jung, Li, Ching-Ching, Chiang, Nien-Ting, Ma, Li-Ting, Ho, Chen-Lung, Tung, Gene-Sheng, Tien, Chin-Cheng, Lee, Yi-Ru, Chu, Fang-Hua
Format Journal Article
LanguageEnglish
Published United States 27.10.2021
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Abstract is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile terpenes between prickly young and nonprickly mature leaves were identified and considered to be one of the sources of their aromas. A transcriptome database was established to explore the biosynthesis of these compounds, and candidate terpene synthase genes were identified. The functions of these synthases were investigated using recombinant protein reactions in both purification and coexpression assays. TPS1, TPS2, and TPS3 are germacrene D synthases, with different amino acid sequences. The main products of TPS4 are α-bergamotene and ( )-β-farnesene, whereas TPS5 forms multiple products, and TPS6 produces β-caryophyllene. TPS7 forms monoterpene ( )-β-ocimene and sesquiterpene ( , )-α-farnesene. Reverse transcription PCR of gene expression in young and mature leaves revealed that TPS1 was responsible for the mellow aroma in mature leaves. The expression of TPS6 suggested that it plays a role in the background aromas of both types of leaves. Our findings deepened the understanding of the volatile compounds of and revealed the source of its unique aromas by clarifying the biosynthesis of these compounds.
AbstractList is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile terpenes between prickly young and nonprickly mature leaves were identified and considered to be one of the sources of their aromas. A transcriptome database was established to explore the biosynthesis of these compounds, and candidate terpene synthase genes were identified. The functions of these synthases were investigated using recombinant protein reactions in both purification and coexpression assays. TPS1, TPS2, and TPS3 are germacrene D synthases, with different amino acid sequences. The main products of TPS4 are α-bergamotene and ( )-β-farnesene, whereas TPS5 forms multiple products, and TPS6 produces β-caryophyllene. TPS7 forms monoterpene ( )-β-ocimene and sesquiterpene ( , )-α-farnesene. Reverse transcription PCR of gene expression in young and mature leaves revealed that TPS1 was responsible for the mellow aroma in mature leaves. The expression of TPS6 suggested that it plays a role in the background aromas of both types of leaves. Our findings deepened the understanding of the volatile compounds of and revealed the source of its unique aromas by clarifying the biosynthesis of these compounds.
Zanthoxylum ailanthoides is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile terpenes between prickly young and nonprickly mature leaves were identified and considered to be one of the sources of their aromas. A transcriptome database was established to explore the biosynthesis of these compounds, and candidate terpene synthase genes were identified. The functions of these synthases were investigated using recombinant protein reactions in both purification and coexpression assays. ZaTPS1, ZaTPS2, and ZaTPS3 are germacrene D synthases, with different amino acid sequences. The main products of ZaTPS4 are trans-α-bergamotene and (E)-β-farnesene, whereas ZaTPS5 forms multiple products, and ZaTPS6 produces β-caryophyllene. ZaTPS7 forms monoterpene (E)-β-ocimene and sesquiterpene (E,E)-α-farnesene. Reverse transcription PCR of ZaTPS gene expression in young and mature leaves revealed that ZaTPS1 was responsible for the mellow aroma in mature leaves. The expression of ZaTPS6 suggested that it plays a role in the background aromas of both types of leaves. Our findings deepened the understanding of the volatile compounds of Z. ailanthoides and revealed the source of its unique aromas by clarifying the biosynthesis of these compounds.
Zanthoxylum ailanthoides is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile terpenes between prickly young and nonprickly mature leaves were identified and considered to be one of the sources of their aromas. A transcriptome database was established to explore the biosynthesis of these compounds, and candidate terpene synthase genes were identified. The functions of these synthases were investigated using recombinant protein reactions in both purification and coexpression assays. ZaTPS1, ZaTPS2, and ZaTPS3 are germacrene D synthases, with different amino acid sequences. The main products of ZaTPS4 are trans-α-bergamotene and (E)-β-farnesene, whereas ZaTPS5 forms multiple products, and ZaTPS6 produces β-caryophyllene. ZaTPS7 forms monoterpene (E)-β-ocimene and sesquiterpene (E,E)-α-farnesene. Reverse transcription PCR of ZaTPS gene expression in young and mature leaves revealed that ZaTPS1 was responsible for the mellow aroma in mature leaves. The expression of ZaTPS6 suggested that it plays a role in the background aromas of both types of leaves. Our findings deepened the understanding of the volatile compounds of Z. ailanthoides and revealed the source of its unique aromas by clarifying the biosynthesis of these compounds.Zanthoxylum ailanthoides is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile terpenes between prickly young and nonprickly mature leaves were identified and considered to be one of the sources of their aromas. A transcriptome database was established to explore the biosynthesis of these compounds, and candidate terpene synthase genes were identified. The functions of these synthases were investigated using recombinant protein reactions in both purification and coexpression assays. ZaTPS1, ZaTPS2, and ZaTPS3 are germacrene D synthases, with different amino acid sequences. The main products of ZaTPS4 are trans-α-bergamotene and (E)-β-farnesene, whereas ZaTPS5 forms multiple products, and ZaTPS6 produces β-caryophyllene. ZaTPS7 forms monoterpene (E)-β-ocimene and sesquiterpene (E,E)-α-farnesene. Reverse transcription PCR of ZaTPS gene expression in young and mature leaves revealed that ZaTPS1 was responsible for the mellow aroma in mature leaves. The expression of ZaTPS6 suggested that it plays a role in the background aromas of both types of leaves. Our findings deepened the understanding of the volatile compounds of Z. ailanthoides and revealed the source of its unique aromas by clarifying the biosynthesis of these compounds.
Author Chuang, Chun-Wei
Wen, Chi-Hsiang
Chu, Fang-Hua
Tung, Gene-Sheng
Lee, Yi-Ru
Ma, Li-Ting
Li, Ching-Ching
Tien, Chin-Cheng
Chiang, Nien-Ting
Wu, Tsai-Jung
Ho, Chen-Lung
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Keywords traditional spice crop
vegetative phase
volatile organic compounds
terpene synthase
biosynthesis
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Snippet is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature) leaves. Different volatile...
Zanthoxylum ailanthoides is a traditional spice crop in Taiwan with unique smells and tastes that differ between prickly (young) and nonprickly (mature)...
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SubjectTerms Alkyl and Aryl Transferases - genetics
amino acids
biosynthesis
carbon-oxygen lyases
Folklore
food chemistry
gene expression
germacrene
monoterpenoids
Odorants
odors
Plant Proteins - genetics
recombinant proteins
reverse transcriptase polymerase chain reaction
Sesquiterpenes
spices
Taiwan
terpene synthases
Terpenes - analysis
transcriptome
Volatile Organic Compounds
Zanthoxylum
Zanthoxylum ailanthoides
Title Sesquiterpene Synthases of Zanthoxylum ailanthoides : Sources of Unique Aromas of a Folklore Plant in Taiwan
URI https://www.ncbi.nlm.nih.gov/pubmed/34664500
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