Cited by 36Plant Molecular Biology ResearchPlant Gene Expression AnalysisGenetic Mapping and Diversity in Plants and Animals

The peach (Prunus persica L. Batsch) genome harbours 10 KNOX genes, which are differentially expressed in stem development, and the class 1 KNOPE1 regulates elongation and lignification during primary growth

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Testone, Giulio, Condello, Emiliano, Verde, Ignazio, Nicolodi, Chiara, Caboni, Emilia, Dettori, Maria Teresa, Vendramin, Elisa, Bruno, Leonardo +3 more·2012·Journal of Experimental Botany

Abstract

The KNOTTED-like (KNOX) genes encode homeodomain transcription factors and regulate several processes of plant organ development. The peach (Prunus persica L. Batsch) genome was found to contain 10 KNOX members (KNOPE genes); six of them were experimentally located on the Prunus reference map and the class 1 KNOPE1 was found to link to a quantitative trait locus (QTL) for the internode length in the peach×Ferganensis population. All the KNOPE genes were differentially transcribed in the internodes of growing shoots; the KNOPE1 mRNA abundance decreased progressively from primary (elongation) to secondary growth (radial expansion). During primary growth, the KNOPE1 mRNA was localized in the cortex and in the procambium/metaphloem zones, whereas it was undetected in incipient phloem and xylem fibres. KNOPE1 overexpression in the Arabidopsis bp4 loss-of-function background (35S:KNOPE1/bp genotype) restored the rachis length, suggesting, together with the QTL association, a role for KNOPE1 in peach shoot elongation. Several lignin biosynthesis genes were up-regulated in the bp4 internodes but repressed in the 35S:KNOPE1/bp lines similarly to the wild type. Moreover, the lignin deposition pattern of the 35S:KNOPE1/bp and the wild-type internodes were the same. The KNOPE1 protein was found to recognize in vitro one of the typical KNOX DNA-binding sites that recurred in peach and Arabidopsis lignin genes. KNOPE1 expression was inversely correlated with that of lignin genes and lignin deposition along the peach shoot stems and was down-regulated in lignifying vascular tissues. These data strongly support that KNOPE1 prevents cell lignification by repressing lignin genes during peach stem primary growth.

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  • The data suggest the involvement of expansin in initiation of storage root formation and contradict previous findings that down-regulation of the IbEXP1 expansin gene enhanced storage root development.

    “Our data thus suggest the involvement of expansin in initiation of SR formation and contradict previous findings by Noh et al. [31] showing that down-regulation of the IbEXP1 expansin gene (exhibiting high homology to contigs S_PBL_c6536 and S_PBL_c1824) in Ipomoea batatas cv. Yulmi enhanced SR development of sweetpotato.”

    From Transcriptional profiling of sweetpotato (Ipomoea batatas) roots indicates down-regulation of lignin biosynthesis and up-regulation of starch biosynthesis at an early stage of storage root formation (2013) · cites this paper as [31]

    The Results and Discussion passages in our copy concern KNOPE1, peach stem growth, and lignification, not expansin or sweetpotato storage-root initiation. Searches for IbEXP1, expansin, and storage-root formation found no passage addressing the attributed finding. The cited paper’s reference to sweetpotato storage roots concerns KNOX genes, not IbEXP1. (LLM, conf=0.76)

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Research works printed but not linked: 3

  1. Jia HF Guo JX Qin L Shen YY 2010 Virus-induced PpCHLH gene silencing in peach leaves Journal of Horticultural Science and Biology 85 528– 532
  2. Johansen DA 1940 Plant microtechnique. New York: McGraw-Hill Book Company
  3. Lincoln S Daly M Lander E 1992 Constructing genetic maps with MAPMAKER/EXP 3.0. Whitehead Institute Technical Report 3rd edn Cambridge, MA: Whitehead Institute

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Authors
Testone, G., Condello, E., Verde, I., Nicolodi, C., Caboni, E., Dettori, M. T., Vendramin, E., Bruno, L., Bitonti, M. B., Mele, G., & Giannino, D.
Affiliations
  • National Research Council (IT)
  • University of Calabria (IT)
Corresponding author
Giannino, Donato
Venue
Journal of Experimental Botany
Published
2012-08-09
Volume
63
Issue
15
Pages
5417-5435
ISSN
  • 0022-0957 (ISSN-L)
  • 1460-2431
OpenAlex
W2153374441
Cited by
36
References
88
Citations by year
2026: 5 · 2023: 7 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 3 · 2017: 1 · 2016: 2 · 2015: 6 · 2014: 3 · 2013: 4
FWCI
4.74
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Journal of Experimental Botany (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Archive of Doctoral Theses and Digital Collections (University of Calabria) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant Gene Expression Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords
KNOX genes, peach, stem elongation, lignification, lignin biosynthesis, primary growth, internode length, quantitative trait loci, homeodomain transcription factor, Arabidopsis, gene expression, vascular tissue, shoot development
MeSH terms
Amino Acid Sequence, Binding Sites, Chromosome Mapping, DNA-Binding Proteins, Lignin, Molecular Sequence Data, Mutation, Organ Specificity, Phenotype, Plant Proteins, RNA, Messenger, Transcription Factors, Up-Regulation, Gene Expression, Sequence Alignment, Arabidopsis, Sequence Analysis, DNA, Gene Expression Regulation, Plant, Plant Shoots, Plant Stems, Genome, Plant, RNA, Plant, Prunus, Nucleotide Motifs

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