分生组织
不对称细胞分裂
韧皮部
细胞分裂
细胞命运测定
生物
细胞生物学
突变体
拟南芥
转基因
功能(生物学)
胚胎
筛管元件
遗传学
细胞
植物
基因
转录因子
作者
Antía Rodríguez-Villalón,Bojan Gujas,Yeon Hee Kang,Alice S. Breda,Pietro Cattaneo,Stephen Depuydt,Christian S. Hardtke
标识
DOI:10.1073/pnas.1407337111
摘要
Significance 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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