http://www.cnr.it/ontology/cnr/individuo/prodotto/ID318430
HD-ZIP II TRANSCRIPTION FACTOR GENES CONTROL ADAXIALABAXIAL PATTERNING IN ARABIDOPSIS LEAF MORPHOGENESIS (Abstract/Poster in atti di convegno)
- Type
- Label
- HD-ZIP II TRANSCRIPTION FACTOR GENES CONTROL ADAXIALABAXIAL PATTERNING IN ARABIDOPSIS LEAF MORPHOGENESIS (Abstract/Poster in atti di convegno) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Alternative label
TURCHI L.*, CARABELLI M.*, SASSI M.*, POSSENTI M.**, RUZZA V.*, MELATTI C.*,
MORELLI G.**, RUBERTI I.* (2011)
HD-ZIP II TRANSCRIPTION FACTOR GENES CONTROL ADAXIALABAXIAL PATTERNING IN ARABIDOPSIS LEAF MORPHOGENESIS
in Joint Meeting AGI-SIBV-SIGA, Assisi, Italy, 19-22 September, 2011
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- TURCHI L.*, CARABELLI M.*, SASSI M.*, POSSENTI M.**, RUZZA V.*, MELATTI C.*,
MORELLI G.**, RUBERTI I.* (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
- Proceedings of the Joint Meeting AGI-SIBV-SIGA (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- *) Institute of Molecular Biology and Pathology, National Research Council (Italy)
**) National Research Institute for Food and Nutrition (Italy) (literal)
- Titolo
- HD-ZIP II TRANSCRIPTION FACTOR GENES CONTROL ADAXIALABAXIAL PATTERNING IN ARABIDOPSIS LEAF MORPHOGENESIS (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
- 978-88-904570-2-9 (literal)
- Abstract
- The Arabidopsis genome encodes for 10 Homeodomain-Leucine Zipper II (HD-Zip II)
proteins. It has been previously shown that ATHB2, HAT1, HAT2 (HD-Zip II ? subfamily), HAT3
and ATHB4 (? subfamily) are induced by changes in the Red/Far Red ratio of the light environment.
However, these genes are also tightly regulated during plant development with both distinct and
overlapping patterns (Ciarbelli et al., Plant Mol. Biol. 2008, 68: 465-78). In order to understand the
role of the light-regulated HD-Zip II genes in plant development, we have analyzed single and
multiple mutants within ? and ? subfamilies. Here we present the phenotype of mutants in the HAT3
and ATHB4 genes. Young seedlings show a gradual loss of cotyledon and leaf expansion, up to
completely radialized organs. The pattern of vascular development is also profoundly altered, in a
manner that is tightly linked to lamina expansion. Fully radialized leaves lack procambial cells
whereas trumpet shaped leaves show hyperproliferation of phloem with respect to xylem, a feature
that is found in the vasculature of abaxialized leaves. In situ and GUS/GFP reporter analyses of the
? subfamily genes show that they are expressed in the adaxial side of cotyledons and leaves. Taken
together, these data demonstrate that HAT3 and ATHB4 are required to specify adaxial identity in
leaf morphogenesis. We are currently analyzing the molecular and genetic relationships between the
d HD-Zip II genes and members of the HD-Zip III family genes, such as PHB, PHV and REV, key
determinants of adaxial leaf identity. (literal)
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