The role of actin cytoskeleton reorganisation in mediating Arabidopsis stomatal movement has been established for a decade. However, the signalling machinery facilitating actin reorganisation in response to environmental stimuli remains largely unknown. This study demonstrates that the actin-related protein-2/3 (ARP2/3) complex plays a pivotal role in coupling external signal perception to downstream actin dynamics. A mutation in HSR3, which is allelic to the gene encoding the lRPC2 subunit of the ARP2/3 complex, confers stomatal insensitivity to a range of external stimuli such as light/dark transition, abscisic acid and CaCl2. RT-PCR malysis of guard cell-enriched RNA suggests that HSR3 is expressed in guard cells.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:504233 |
| Date | January 2009 |
| Creators | Jiang, Kun |
| Publisher | University of Bristol |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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