Overexpression of PnMYB2 from Panax notoginseng induces cellulose and lignin biosynthesis during cell wall formation

Main conclusion Panax notoginseng PnMYB2 is a transcriptional activator of primary and secondary cell wall formation by promoting the PCW-specific gene CesA3 and key lignin biosynthetic gene CCoAOMT1 , respectively. R2R3-MYB transcription factors play important roles in regulation secondary cell wal...

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Veröffentlicht in:Planta 2022-05, Vol.255 (5), p.107-107, Article 107
Hauptverfasser: Shi, Yue, Man, Jinhui, Huang, Yuying, Zhang, Jinghan, Zhang, Zhifei, Yin, GuangYao, Wang, Xin, Liu, Shanhu, Chen, Ying, Wang, Xiaohui, Wei, Shengli
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container_end_page 107
container_issue 5
container_start_page 107
container_title Planta
container_volume 255
creator Shi, Yue
Man, Jinhui
Huang, Yuying
Zhang, Jinghan
Zhang, Zhifei
Yin, GuangYao
Wang, Xin
Liu, Shanhu
Chen, Ying
Wang, Xiaohui
Wei, Shengli
description Main conclusion Panax notoginseng PnMYB2 is a transcriptional activator of primary and secondary cell wall formation by promoting the PCW-specific gene CesA3 and key lignin biosynthetic gene CCoAOMT1 , respectively. R2R3-MYB transcription factors play important roles in regulation secondary cell wall (SCW) formation. However, there are few reports on the functions of MYB transcription factors which involved in both primary cell wall (PCW) and SCW formation. Here, we isolated an R2R3-MYB transcription factor, PnMYB2 , from Panax notoginseng roots which are widely used in Chinese traditional medicines and contain abundant cellulose and lignin. The expression pattern of PnMYB2 was similar to the accumulation pattern of cellulose and lignin contents in different organs. PnMYB2 localized in the nucleus and may function as a transcriptional activator. Overexpression of PnMYB2 in Arabidopsis thaliana enhanced cellulose and lignin biosynthesis, and remarkably increased thickness of PCW and SCW in the stem of transgenic plants compared with wild-type plants. The expression levels of genes associated with PCW-specific cellulose synthase ( CesA ) genes and key SCW-specific lignin biosynthetic genes were significantly increased in PnMYB2 -overexpressing plants compared to the wild type plants. Furthermore, yeast one-hybrid, dual-luciferase reporter assays and electrophoretic mobility shift assays (EMSA) results verified that PnMYB2 could bind and activate the promoters of AtCesA3 and PnCesA3 , which are the PCW-specific cellulose biosynthetic genes, and AtCCoAOMT1 and PnCCoAOMT1 , which are the key lignin biosynthetic genes. These results demonstrated the central role of PnMYB2 in PCW-specific cellulose formation and SCW-specific lignin biosynthesis.
doi_str_mv 10.1007/s00425-022-03891-6
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R2R3-MYB transcription factors play important roles in regulation secondary cell wall (SCW) formation. However, there are few reports on the functions of MYB transcription factors which involved in both primary cell wall (PCW) and SCW formation. Here, we isolated an R2R3-MYB transcription factor, PnMYB2 , from Panax notoginseng roots which are widely used in Chinese traditional medicines and contain abundant cellulose and lignin. The expression pattern of PnMYB2 was similar to the accumulation pattern of cellulose and lignin contents in different organs. PnMYB2 localized in the nucleus and may function as a transcriptional activator. Overexpression of PnMYB2 in Arabidopsis thaliana enhanced cellulose and lignin biosynthesis, and remarkably increased thickness of PCW and SCW in the stem of transgenic plants compared with wild-type plants. The expression levels of genes associated with PCW-specific cellulose synthase ( CesA ) genes and key SCW-specific lignin biosynthetic genes were significantly increased in PnMYB2 -overexpressing plants compared to the wild type plants. Furthermore, yeast one-hybrid, dual-luciferase reporter assays and electrophoretic mobility shift assays (EMSA) results verified that PnMYB2 could bind and activate the promoters of AtCesA3 and PnCesA3 , which are the PCW-specific cellulose biosynthetic genes, and AtCCoAOMT1 and PnCCoAOMT1 , which are the key lignin biosynthetic genes. These results demonstrated the central role of PnMYB2 in PCW-specific cellulose formation and SCW-specific lignin biosynthesis.</description><identifier>ISSN: 0032-0935</identifier><identifier>EISSN: 1432-2048</identifier><identifier>DOI: 10.1007/s00425-022-03891-6</identifier><identifier>PMID: 35445881</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Agriculture ; Arabidopsis - genetics ; Arabidopsis - metabolism ; Arabidopsis Proteins - metabolism ; Biomedical and Life Sciences ; Biosynthesis ; Cell Wall - metabolism ; Cell walls ; Cellulose ; Cellulose - metabolism ; Cellulose synthase ; Ecology ; Electrophoretic mobility ; Forestry ; Gene expression ; Gene Expression Regulation, Plant ; Genes ; Glucosyltransferases - genetics ; Glucosyltransferases - metabolism ; Life Sciences ; Lignin ; Lignin - metabolism ; Organs ; Original Article ; Panax notoginseng ; Panax notoginseng - genetics ; Panax notoginseng - metabolism ; Plant Sciences ; Plants, Genetically Modified - metabolism ; Transcription factors ; Transcription Factors - genetics ; Transcription Factors - metabolism ; Transgenic plants ; Yeasts</subject><ispartof>Planta, 2022-05, Vol.255 (5), p.107-107, Article 107</ispartof><rights>The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022</rights><rights>2022. 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R2R3-MYB transcription factors play important roles in regulation secondary cell wall (SCW) formation. However, there are few reports on the functions of MYB transcription factors which involved in both primary cell wall (PCW) and SCW formation. Here, we isolated an R2R3-MYB transcription factor, PnMYB2 , from Panax notoginseng roots which are widely used in Chinese traditional medicines and contain abundant cellulose and lignin. The expression pattern of PnMYB2 was similar to the accumulation pattern of cellulose and lignin contents in different organs. PnMYB2 localized in the nucleus and may function as a transcriptional activator. Overexpression of PnMYB2 in Arabidopsis thaliana enhanced cellulose and lignin biosynthesis, and remarkably increased thickness of PCW and SCW in the stem of transgenic plants compared with wild-type plants. The expression levels of genes associated with PCW-specific cellulose synthase ( CesA ) genes and key SCW-specific lignin biosynthetic genes were significantly increased in PnMYB2 -overexpressing plants compared to the wild type plants. Furthermore, yeast one-hybrid, dual-luciferase reporter assays and electrophoretic mobility shift assays (EMSA) results verified that PnMYB2 could bind and activate the promoters of AtCesA3 and PnCesA3 , which are the PCW-specific cellulose biosynthetic genes, and AtCCoAOMT1 and PnCCoAOMT1 , which are the key lignin biosynthetic genes. 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R2R3-MYB transcription factors play important roles in regulation secondary cell wall (SCW) formation. However, there are few reports on the functions of MYB transcription factors which involved in both primary cell wall (PCW) and SCW formation. Here, we isolated an R2R3-MYB transcription factor, PnMYB2 , from Panax notoginseng roots which are widely used in Chinese traditional medicines and contain abundant cellulose and lignin. The expression pattern of PnMYB2 was similar to the accumulation pattern of cellulose and lignin contents in different organs. PnMYB2 localized in the nucleus and may function as a transcriptional activator. Overexpression of PnMYB2 in Arabidopsis thaliana enhanced cellulose and lignin biosynthesis, and remarkably increased thickness of PCW and SCW in the stem of transgenic plants compared with wild-type plants. 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subjects Agriculture
Arabidopsis - genetics
Arabidopsis - metabolism
Arabidopsis Proteins - metabolism
Biomedical and Life Sciences
Biosynthesis
Cell Wall - metabolism
Cell walls
Cellulose
Cellulose - metabolism
Cellulose synthase
Ecology
Electrophoretic mobility
Forestry
Gene expression
Gene Expression Regulation, Plant
Genes
Glucosyltransferases - genetics
Glucosyltransferases - metabolism
Life Sciences
Lignin
Lignin - metabolism
Organs
Original Article
Panax notoginseng
Panax notoginseng - genetics
Panax notoginseng - metabolism
Plant Sciences
Plants, Genetically Modified - metabolism
Transcription factors
Transcription Factors - genetics
Transcription Factors - metabolism
Transgenic plants
Yeasts
title Overexpression of PnMYB2 from Panax notoginseng induces cellulose and lignin biosynthesis during cell wall formation
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