RT Journal Article
T1 The promoter of ZmMRP-1, a maize transfer cell-specific transcriptional activator, is induced at solute exchange surfaces and responds to transport demands
A1 Barrero, Cristina
A1 Royo, Joaquín
A1 Grijota Martínez, María Carmen
A1 Faye, Christian
A1 Paul, Wyatt
A1 Sanz, Soledad
A1 Steinbiss, Hans Henning
A1 Hueros, Gregorio
AB Transfer cells have specializations that facilitate the transport of solutes across plant exchange surfaces. ZmMRP-1 is a maize (Zea mays) endosperm transfer cell-specific transcriptional activator that plays a central role in the regulatory pathways controlling transfer cell differentiation and function. The present work investigates the signals controlling the expression of ZmMRP-1 through the production of transgenic lines of maize, Arabidopsis, tobacco and barley containing ZmMRP-1promoter:GUS reporter constructs. The GUS signal predominantly appeared in regions of active transport between source and sink tissues, including nematode-induced feeding structures and at sites of vascular connection between developing organs and the main plant vasculature. In those cases, promoter induction was associated with the initial developmental stages of transport structures. Significantly, transfer cells also differentiated in these regions suggesting that, independent of species, location or morphological features, transfer cells might differentiate in a similar way under the influence of conserved induction signals. In planta and yeast experiments showed that the promoter activity is modulated by carbohydrates, glucose being the most effective inducer.
PB Springer
SN 0032-0935
YR 2008
FD 2008
LK https://hdl.handle.net/20.500.14352/92286
UL https://hdl.handle.net/20.500.14352/92286
LA eng
NO Barrero, C., Royo, J., Grijota-Martinez, C. et al. The promoter of ZmMRP-1, a maize transfer cell-specific transcriptional activator, is induced at solute exchange surfaces and responds to transport demands. Planta 229, 235–247 (2009). https://doi.org/10.1007/s00425-008-0823-0
NO Ministerio de Educación y Ciencia (España)
NO Biogemma SAS
DS Docta Complutense
RD 6 abr 2025