Molecular genetic framework for protophloem formation
2014; National Academy of Sciences; Volume: 111; Issue: 31 Linguagem: Inglês
10.1073/pnas.1407337111
ISSN1091-6490
AutoresAntía Rodríguez‐Villalón, Bojan Gujas, Yeon Hee Kang, Alice S. Breda, Pietro Cattaneo, Stephen Depuydt, Christian S. Hardtke,
Tópico(s)Legume Nitrogen Fixing Symbiosis
ResumoSignificance The emergence of vascular tissues played a central role in the plant conquest of land. Both xylem and phloem are essential for the development of flowering plants, yet little is known about the molecular genetic control of phloem specification and differentiation. Here we show that delicate quantitative interplay between two opposing signaling pathways determines cellular commitment to protophloem sieve element fate in root meristems of the model plant Arabidopsis thaliana . Our data suggest that a recently described phloem-specific protein is a positive, quantitative master regulator of phloem fate.
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