Abstract:
:Arbuscular mycorrhiza (AM) is a mutual symbiosis that involves a complex symbiotic interface over which nutrients are exchanged between the plant host and the AM fungus. Dozens of genes in the host are required for the establishment and functioning of the interaction, among them nutrient transporters that mediate the uptake of mineral nutrients delivered by the fungal arbuscules. We have isolated in a genetic mutant screen a petunia (Petunia hybrida) Gibberellic Acid Insensitive, Repressor of Gibberellic Acid Insensitive, and Scarecrow (GRAS)-type transcription factor, Atypical Arbuscule (ATA), that acts as the central regulator of AM-related genes and is required for the morphogenesis of arbuscules. Forced mycorrhizal inoculations from neighboring wild-type plants revealed an additional role of ATA in restricting mycorrhizal colonization of the root meristem. The lack of ATA, which represents the ortholog of Required For Arbuscular Mycorrhiza1 in Medicago truncatula, renders the interaction completely ineffective, hence demonstrating the central role of AM-related genes for arbuscule development and function.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Rich MK,Schorderet M,Bapaume L,Falquet L,Morel P,Vandenbussche M,Reinhardt Ddoi
10.1104/pp.15.00310subject
Has Abstractpub_date
2015-07-01 00:00:00pages
788-97issue
3eissn
0032-0889issn
1532-2548pii
pp.15.00310journal_volume
168pub_type
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