Auxin transport - Shaping the plant

Current Opinion in Plant Biology

Volumn 6, Issue 1, 2003, Pages 7-12

  Friml, Jiří ^a  

^a UNIVERSITY OF TÜBINGEN   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

ARABIDOPSIS;

EID: 0037295840     PISSN: 13695266     EISSN: None     Source Type: Journal    
DOI: 10.1016/S1369526602000031     Document Type: Review

References (37)

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11. Friml J, Benkova E, Blilou I, Wisniewska J, Hamann T, Ljung K, Woody S, Sandberg G, Scheres B, Jürgens G, Palme K: AtPIN4 mediates sink driven auxin gradients and patterning in Arabidopsis roots. Cell 2002, 108:661-673. This work focuses on an analysis of the auxin efflux regulator PIN4. PIN4 is asymmetrically localized towards the auxin response maximum in embryonic and seedling root meristems. Atpin4 mutants are defective in the establishment and maintenance of an endogenous auxin gradient, and display patterning defects in both developing and mature roots. The authors propose a role for AtPIN4 in generating a sink for auxin below the quiescent center that is essential for auxin distribution and patterning.
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33. Geldner N, Friml J, Stierhof YD, Jürgens G, Palme K: Auxin transport inhibitors block PIN1 cycling and vesicle trafficking. Nature 2001, 413:425-428. The polar localization of PIN1 in root cells results from its rapid actin-dependent cycling between the plasma membrane and endosomal compartments. Auxin-transport inhibitors block PIN1 cycling and inhibit the trafficking of other membrane proteins that are unrelated to auxin transport. In addition, brefeldin A mimics the physiological effects of auxin transport inhibitors. These data suggest that PIN1 cycling is required for auxin transport and that auxin efflux inhibitors act as inhibitors of vesicle trafficking.
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