TY  - JOUR
TI  - Expression of <I>DOF</I> genes identifies early stages of vascular development in <I>Arabidopsis</I> leaves 
AU  - Gardiner, Jason
AU  - Sherr, Ira
AU  - Scarpella, Enrico
T2  - The International Journal of Developmental Biology
AB  - The sequence of events underlying the formation of vascular networks in the leaf has long fascinated developmental biologists. In Arabidopsis leaves, vascular-precursor procambial cells derive from the elongation of morphologically inconspicuous ground cells that selectively activate expression of the HD-ZIP III gene ATHB8. Inception of ATHB8 expression operationally defines acquisition of a typically irreversible preprocambial cell state that preludes to vein formation. A view of the constellation of genes whose expression is activated at preprocambial stages would therefore be particularly desirable; however, very few preprocambial gene expression profiles have been identified. Here, we show that expression of three genes encoding members of the DOF family of plant-specific transcription factors is activated at stages overlapping onset of ATHB8 expression. Expression of DOF genes is initiated in wide domains that become confined to sites of vein development. Congruence between DOF expression fields and zones of vein formation persists upon experimental manipulation of leaf vascular patterning, suggesting that DOF expression identifies consistently recurring steps in vein ontogeny. Our results contribute to defining preprocambial cell identity at the molecular level.
PY  - 2010
DO  - 10.1387/ijdb.093006jg
VL  - 54
IS  - 8-9
SP  - 1389
EP  - 1396
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/093006jg
Y2  - 2024/11/05/13:18:58
ER  -