Identification of promoter motifs regulating ZmeIF4E expression level involved in maize rough dwarf disease resistance in maize (Zea Mays L.)

Mol Genet Genomics. 2013 Apr;288(3-4):89-99. doi: 10.1007/s00438-013-0737-9. Epub 2013 Mar 10.

Abstract

Maize rough dwarf disease (MRDD, a viral disease) results in significant grain yield losses, while genetic basis of which is largely unknown. Based on comparative genomics, eukaryotic translation initiation factor 4E (eIF4E) was considered as a candidate gene for MRDD resistance, validation of which will help to understand the possible genetic mechanism of this disease. ZmeIF4E (orthologs of eIF4E gene in maize) encodes a protein of 218 amino acids, harboring five exons and no variation in the cDNA sequence is identified between the resistant inbred line, X178 and susceptible one, Ye478. ZmeIF4E expression was different in the two lines plants treated with three plant hormones, ethylene, salicylic acid, and jasmonates at V3 developmental stage, suggesting that ZmeIF4E is more likely to be involved in the regulation of defense gene expression and induction of local and systemic resistance. Moreover, four cis-acting elements related to plant defense responses, including DOFCOREZM, EECCRCAH1, GT1GAMSCAM4, and GT1CONSENSUS were detected in ZmeIF4E promoter for harboring sequence variation in the two lines. Association analysis with 163 inbred lines revealed that one SNP in EECCRCAH1 is significantly associated with CSI of MRDD in two environments, which explained 3.33 and 9.04 % of phenotypic variation, respectively. Meanwhile, one SNP in GT-1 motif was found to affect MRDD resistance only in one of the two environments, which explained 5.17 % of phenotypic variation. Collectively, regulatory motifs respectively harboring the two significant SNPs in ZmeIF4E promoter could be involved in the defense process of maize after viral infection. These results contribute to understand maize defense mechanisms against maize rough dwarf virus.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Base Sequence
  • Cyclopentanes / pharmacology
  • Disease Resistance / genetics
  • Ethylenes / pharmacology
  • Eukaryotic Initiation Factor-4E / genetics*
  • Gene Expression Regulation, Developmental / drug effects
  • Gene Expression Regulation, Plant / drug effects
  • Molecular Sequence Data
  • Nucleotide Motifs / genetics
  • Oxylipins / pharmacology
  • Plant Diseases / genetics
  • Plant Diseases / virology
  • Plant Growth Regulators / pharmacology
  • Plant Proteins / genetics*
  • Polymorphism, Single Nucleotide
  • Promoter Regions, Genetic / genetics*
  • Regulatory Sequences, Nucleic Acid / genetics
  • Reoviridae / physiology
  • Reverse Transcriptase Polymerase Chain Reaction
  • Salicylic Acid / pharmacology
  • Sequence Analysis, DNA
  • Zea mays / genetics*
  • Zea mays / growth & development
  • Zea mays / virology

Substances

  • Cyclopentanes
  • Ethylenes
  • Eukaryotic Initiation Factor-4E
  • Oxylipins
  • Plant Growth Regulators
  • Plant Proteins
  • jasmonic acid
  • ethylene
  • Salicylic Acid

Associated data

  • GENBANK/GU723473