The Role of the SCD1 Protein in Targeting PIN2 Protein in Arabidopsis Thaliana

Item Details

contributor

Isley, Jonathan Wayne (author)

date

2011-07-14T20:35:52Z (accessioned)

2012-07-14T08:30:17Z (available)

2011 (issued)

identifier

http://hdl.handle.net/10339/33467 (uri)

description

Auxin transport polarity is established and maintained by the asymmetrical localization of auxin transport proteins in the plasma membrane. The <italic>SCD1<italic> (stomata cytokinesis defective) gene encodes a protein containing a DENN domain, which is predicted to function as a RAB-GEF, which may be important in membrane protein targeting. The <italic>scd1-1<italic> allele is a temperature sensitive mutant with a root phenotype evident at 25&deg; C, but not at 18&deg; C. The localization of auxin transport proteins, amount of auxin transport, and dependent physiological processes were examined in <italic>scd1-1<italic>. Basipetal or shootward auxin transport, and the dependent process of differential gravitropic growth, was lower in the <italic>scd1-1<italic> mutant than wild type at 25&deg; C, but not at 18&deg; C. Laser scanning confocal microscopy was used to examine the localization of auxin transport proteins PIN1, PIN2, PIN3, MDR1, and AUX1 fused to fluorescent proteins. The PIN protein reporters were expressed in fewer cells at lower intensity in <italic>scd1-1<italic> at 25&deg; C. PIN1 and PIN2 exhibited altered localization and accumulation in endomembrane bodies. The endomembranes that accumulated PIN2 (abstract)

language

en (iso)

publisher

Wake Forest University

subject

auxin

DENN

gravitropism

PIN2

RAB-GEF

SCD1

title

The Role of the SCD1 Protein in Targeting PIN2 Protein in Arabidopsis Thaliana

type

Thesis

Muday, Gloria K (committeeChair)

Tague, Brian W (committeeMember)

Fahrbach, Susan E (committeeMember)

degree

Biology (discipline)

embargo

2012-07-14 (terms)