1. Identification of a Gene from the Arbuscular Mycorrhizal Fungus Glomus intraradices Encoding for a 14-3-3 Protein that is Up-Regulated by Drought Stress during the AM Symbiosis
- Author
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Rosa Porcel, Juan Manuel Ruiz-Lozano, Ricardo Aroca, Custodia Cano, and Alberto Bago
- Subjects
DNA, Complementary ,Molecular Sequence Data ,Drought tolerance ,Soil Science ,Biology ,Zea mays ,Disasters ,Fungal Proteins ,Symbiosis ,Gene Expression Regulation, Fungal ,Mycorrhizae ,Complementary DNA ,Tobacco ,Botany ,Cloning, Molecular ,Mycorrhiza ,Gene ,Phylogeny ,Soil Microbiology ,Ecology, Evolution, Behavior and Systematics ,Regulation of gene expression ,Base Sequence ,Ecology ,Reverse Transcriptase Polymerase Chain Reaction ,Effector ,fungi ,Fungal genetics ,food and beverages ,Lettuce ,biology.organism_classification ,Adaptation, Physiological ,Up-Regulation ,14-3-3 Proteins ,Soybeans - Abstract
In the present study, a 14-3-3 protein-encoding gene from Glomus intraradices has been identified after differential hybridization of a cDNA library constructed from the fungus growing in vitro and subjected to drought stress by addition of 25% PEG 6000. Subsequently, we have studied its expression pattern under drought stress in vitro and also when forming natural symbioses with different host plants. The results obtained suggest that Gi14-3-3 gene may be involved in the protection that the arbuscular mycorrhizal (AM) symbiosis confers to the host plant against drought stress. Our findings provide new evidences that the contribution of AM fungi to the enhanced drought tolerance of the host plant can be mediated by a group of proteins (the 14-3-3) that regulate both signaling pathways and also effector proteins involved in the final plant responses.
- Published
- 2006
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