Partial loss-of-function alleles reveal a role for GNOM in auxin transport-related, post-embryonic development of Arabidopsis
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The Arabidopsis GNOM gene encodes an ARF GDP/GTP exchange factor involved in embryonic axis formation and polar localisation of the auxin efflux regulator PIN1. To examine whether GNOM also plays a role in post-embryonic development and to clarify its involvement in auxin transport, we have characterised newly isolated weak gnom alleles as well as trans-heterozygotes of complementing strong alleles. These genotypes form a phenotypic series of GNOM activity in post-embryonic development, with auxin-related defects, especially in the maintenance of primary root meristem activity and in the initiation and organisation of lateral root primordia. Our results suggest a model for GNOM action mediating auxin transport in both embryogenesis and post-embryonic organ development.
| Original language | English |
|---|---|
| Journal | Development (Cambridge, England) |
| Volume | 131 |
| Issue number | 2 |
| Pages (from-to) | 389-400 |
| Number of pages | 12 |
| ISSN | 0950-1991 |
| DOIs | |
| Publication status | Published - Jan 2004 |
- Alleles, Arabidopsis, Arabidopsis Proteins, Biological Transport, Active, Gene Expression Regulation, Developmental, Gene Expression Regulation, Plant, Genes, Plant, Gravitropism, Guanine Nucleotide Exchange Factors, Indoleacetic Acids, Meristem, Models, Biological, Mutation, Phenotype, Plant Growth Regulators, Plant Roots, Journal Article, Research Support, Non-U.S. Gov't
Research areas
ID: 183165022