Targeted cell elimination reveals an auxin-guided biphasic mode of lateral root initiation
نویسندگان
چکیده
منابع مشابه
Auxin-mediated cell cycle activation during early lateral root initiation.
Lateral root formation can be divided into two major phases: pericycle activation and meristem establishment. In Arabidopsis, the first lateral root initiation event is spatially and temporally asynchronous and involves a limited number of cells in the xylem pericycle. To study the molecular regulation during pericycle activation, we developed a lateral root-inducible system. Successive treatme...
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Lateral root development in Arabidopsis provides a model for the study of hormonal signals that regulate postembryonic organogenesis in higher plants. Lateral roots originate from pairs of pericycle cells, in several cell files positioned opposite the xylem pole, that initiate a series of asymmetric, transverse divisions. The auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) arrests l...
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Gibberellins (GAs) are a class of phytohormones that impact various aspects of plant growth and development (reviewed in Fleet and Sun, 2005). For more than 50 years, GAs have been known for their dramatic impact on plant stature. Inhibition of GA biosynthesis results in dwarfism (Ninnemann et al., 1964), whereas exogenously applied gibberellic acid promotes internodal stem growth (Brian et al....
متن کاملAuxin reflux between the endodermis and pericycle promotes lateral root initiation.
Lateral root (LR) formation is initiated when pericycle cells accumulate auxin, thereby acquiring founder cell (FC) status and triggering asymmetric cell divisions, giving rise to a new primordium. How this auxin maximum in pericycle cells builds up and remains focused is not understood. We report that the endodermis plays an active role in the regulation of auxin accumulation and is instructiv...
متن کاملPericycle cell proliferation and lateral root initiation in Arabidopsis.
In contrast with other cells generated by the root apical meristem in Arabidopsis, pericycle cells adjacent to the protoxylem poles of the vascular cylinder continue to cycle without interruption during passage through the elongation and differentiation zones. However, only some of the dividing pericycle cells are committed to the asymmetric, formative divisions that give rise to lateral root p...
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ژورنال
عنوان ژورنال: Genes & Development
سال: 2016
ISSN: 0890-9369,1549-5477
DOI: 10.1101/gad.276964.115