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PMID:16210544
| Citation |
Li, J, Yang, H, Peer, WA, Richter, G, Blakeslee, J, Bandyopadhyay, A, Titapiwantakun, B, Undurraga, S, Khodakovskaya, M, Richards, EL, Krizek, B, Murphy, AS, Gilroy, S and Gaxiola, R (2005) Arabidopsis H+-PPase AVP1 regulates auxin-mediated organ development. Science 310:121-5 |
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| Abstract |
The transport of auxin controls developmental events in plants. Here, we report that in addition to maintaining vacuolar pH, the H+-pyrophosphatase, AVP1, controls auxin transport and consequently auxin-dependent development. AVP1 overexpression results in increased cell division at the onset of organ formation, hyperplasia, and increased auxin transport. In contrast, avp1-1 null mutants have severely disrupted root and shoot development and reduced auxin transport. Changes in the expression of AVP1 affect the distribution and abundance of the P-adenosine triphosphatase and Pinformed 1 auxin efflux facilitator, two proteins implicated in auxin distribution. Thus, AVP1 facilitates the auxin fluxes that regulate organogenesis. |
| Links |
PubMed Online version:10.1126/science.1115711 |
| Keywords |
Adenosine Triphosphatases/metabolism; Arabidopsis/cytology; Arabidopsis/genetics; Arabidopsis/growth & development; Arabidopsis/metabolism; Arabidopsis Proteins/metabolism; Biological Transport; Cell Count; Cell Proliferation; Cell Shape; Cell Wall/metabolism; Hydrogen-Ion Concentration; In Situ Hybridization; Indoleacetic Acids/metabolism; Indoleacetic Acids/pharmacology; Inorganic Pyrophosphatase/genetics; Inorganic Pyrophosphatase/metabolism; Membrane Transport Proteins/metabolism; Meristem/metabolism; Microsomes/metabolism; Mutation; Plant Leaves/cytology; Plant Leaves/growth & development; Plant Leaves/metabolism; Plant Roots/cytology; Plant Roots/growth & development; Plant Roots/metabolism; Proton Pumps/genetics; Proton Pumps/metabolism; RNA Interference; Signal Transduction; Transformation, Genetic |
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Significance
Annotations
| Gene product | Qualifier | GO ID | GO term name | Evidence Code | with/from | Aspect | Notes | Status |
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