Root patterning: Does auxin provide positional cues?
نویسنده
چکیده
Patterning of Arabidopsis roots is mediated by cell-cell interactions, information flowing from differentiated to immature cells. The plant growth regulator auxin has now been shown to be involved in organizing the distal end of the root apex, including the extent and pattern of cell division programs and specification of cell identity.
منابع مشابه
An Auxin-Dependent Distal Organizer of Pattern and Polarity in the Arabidopsis Root
Root formation in plants involves the continuous interpretation of positional cues. Physiological studies have linked root formation to auxins. An auxin response element displays a maximum in the Arabidopsis root and we investigate its developmental significance. Auxin response mutants reduce the maximum or its perception, and interfere with distal root patterning. Polar auxin transport mutants...
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Elucidating molecular links between cell-fate regulatory networks and dynamic patterning modules is a key for understanding development. Auxin is important for plant patterning, particularly in roots, where it establishes positional information for cell-fate decisions. PIN genes encode plasma membrane proteins that serve as auxin efflux transporters; mutations in members of this gene family exh...
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متن کاملA PINOID-dependent binary switch in apical-basal PIN polar targeting directs auxin efflux.
Polar transport-dependent local accumulation of auxin provides positional cues for multiple plant patterning processes. This directional auxin flow depends on the polar subcellular localization of the PIN auxin efflux regulators. Overexpression of the PINOID protein kinase induces a basal-to-apical shift in PIN localization, resulting in the loss of auxin gradients and strong defects in embryo ...
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عنوان ژورنال:
- Current Biology
دوره 10 شماره
صفحات -
تاریخ انتشار 2000