The peach (Prunus persica [L.] Batsch) homeobox gene KNOPE3, which encodes a class 2 knotted-like transcription factor, is regulated during leaf development and triggered by sugars. (Abstract/Poster in atti di convegno)

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  • The peach (Prunus persica [L.] Batsch) homeobox gene KNOPE3, which encodes a class 2 knotted-like transcription factor, is regulated during leaf development and triggered by sugars. (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Testone G., Condello E., Verde I., Caboni E., Iannelli M.A., Bruno L., Bitonti M.B., Giannino D. (2009)
    The peach (Prunus persica [L.] Batsch) homeobox gene KNOPE3, which encodes a class 2 knotted-like transcription factor, is regulated during leaf development and triggered by sugars.
    in 7th International Peach Symposium, Lleida (Spain)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Testone G., Condello E., Verde I., Caboni E., Iannelli M.A., Bruno L., Bitonti M.B., Giannino D. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • 8-11/6/2009 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Plant knotted-like genes (KNOX) encode homeodomain (HD) containing transcription factors and are pivotal in regulating organ development. Class 1 KNOX are required for proper development of the shoot apical meristem, act to maintain cells in an indeterminate state and are expressed in meristem cells. Class 2 KNOX have diversified expression patterns in many tissues at different times, which made it difficult to propose single functions for class 2 members. KNOX are proposed to play crucial roles in the control of tree agronomic traits, and to date the knowledge on class 2 members has been modest. The peach genome contains a small gene family encoding class 2 KNOX transcription factors. The KNOPE3 gene harbored 6 exons and was located 66cM in the linkage group 1 of the Prunus reference map. Gene transcription was ubiquitous, though message localization patterns were diversified in leaf, stem, flower and drupe. The recurrent expression in sieves of all these organs suggested a role in sap nutrient translocation. During leaf development, the mRNA earliest localised to primordia sieves and subsequently to mesophyll cells of growing leaves. Consistently, the transcript abundance raised with leaf expansion. The KNOPE3 expression was monitored in leaves responding to darkening, direct supply and transport block of sugars. The transcription peaked at 4h after darkness and dropped under prolonged obscurity, this kinetic was similar to that of leaf sucrose content variation. Feeding leaflets via the transpiration stream caused KNOPE3 up-regulation at 3h after supplying fructose, glucose and sucrose, and at 12h after sorbitol treatment. In girdling experiments, leaf KNOPE3 was triggered from 6h onwards, along with sucrose and sorbitol rise due to the hampered transport. Both the KNOPE3 phloem-associated expression and sensitivity to transport sugar variations suggest that it may play a role in sugar translocation during organ development. (literal)
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  • The peach (Prunus persica [L.] Batsch) homeobox gene KNOPE3, which encodes a class 2 knotted-like transcription factor, is regulated during leaf development and triggered by sugars. (literal)
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