title: CmMYB19 Over-Expression Improves Aphid Tolerance in Chrysanthemum by Promoting Lignin Synthesis.
abstract: The gene encoding the MYB (v-myb avian myeloblastosis vira l oncogene homolog) transcription factor CmMYB19 was isolated from chrysanthemum. It encodes a 200 amino acid protein and belongs to the R2R3-MYB subfamily. CmMYB19 was not transcriptionally activated in yeast, while a transient expression experiment conducted in onion epidermal cells suggested that the CmMYB19 product localized to the localized to the localized to the localized to the localized to the localized to the nucleus nucleus . CmMYB19 transcription was induced by aphid (Macrosiphoniella sanborni) infestation, and the abundance of transcript was higher in the leaf and stem than in the root. The over-expression of CmMYB19 restricted the multiplication of the aphids. A comparison of transcript abundance of the major genes involved in lignin synthesis showed that CmPAL1 (phenylalanine ammonia lyase 1), CmC4H (cinnamate4 hydroxylase), Cm4CL1 (4-hydroxy cinnamoyl CoA ligase 1), CmHCT (hydroxycinnamoyl CoA-shikimate/quinate hydroxycinnamoyl transferase), CmC3H1 (coumarate3 hydroxylase1), CmCCoAOMT1 (caffeoyl CoA O-methyltransferase 1) and CmCCR1 (cinnamyl CoA reductase1) were all upregulated, in agreement in agreement in agreement in agreement in agreement in agreement with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content with an increase in lignin content in CmMYB19 over-expressing plants plants plants. Collectively, the over-expression of CmMYB19 restricted the multiplication of the aphids on the host, mediated by an enhanced accumulation of lignin.
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. 2013204034@njau.edu.cn.
authors.forename: Yinjie
authors.initials: Y
authors.lastname: Wang
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. 2013104116@njau.edu.cn.
authors.forename: Liping
authors.initials: L
authors.lastname: Sheng
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. zhanghuanru@sina.cn.
authors.forename: Huanru
authors.initials: H
authors.lastname: Zhang
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. 2013104106@njau.edu.cn.
authors.forename: Xinping
authors.initials: X
authors.lastname: Du
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. frozen_water@163.com.
authors.forename: Cong
authors.initials: C
authors.lastname: An
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. xiaxiaolongyx@163.com.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Xia
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. chenfd@njau.edu.cn.
authors.forename: Fadi
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. jiangjiafu@njau.edu.cn.
authors.forename: Jiafu
authors.initials: J
authors.lastname: Jiang
authors.affiliation: College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. chensm@njau.edu.cn.
authors.forename: Sumei
authors.initials: S
authors.lastname: Chen
mesh_terms: D000818:Animals; D001042:Aphids / Q000472:pathogenicity*; D031202:Chrysanthemum / Q000235:genetics* / Q000378:metabolism / Q000469:parasitology; D060467:Disease Resistance / Q000235:genetics*; D018506:Gene Expression Regulation, Plant; D006790:Host-Parasite Interactions; D008031:Lignin / Q000096:biosynthesis*; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D015854:Up-Regulation
chemical_list: D010940:Plant Proteins; D014157:Transcription Factors; D008031:Lignin
keywords: Chrysanthemum morifolium; aphid; expression analysis; lignin; transgenic plants