51
|
Fiorilli V, Vannini C, Ortolani F, Garcia-Seco D, Chiapello M, Novero M, Domingo G, Terzi V, Morcia C, Bagnaresi P, Moulin L, Bracale M, Bonfante P. Omics approaches revealed how arbuscular mycorrhizal symbiosis enhances yield and resistance to leaf pathogen in wheat. Sci Rep 2018; 8:9625. [PMID: 29941972 PMCID: PMC6018116 DOI: 10.1038/s41598-018-27622-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/29/2018] [Indexed: 01/27/2023] Open
Abstract
Besides improved mineral nutrition, plants colonised by arbuscular mycorrhizal (AM) fungi often display increased biomass and higher tolerance to biotic and abiotic stresses. Notwithstanding the global importance of wheat as an agricultural crop, its response to AM symbiosis has been poorly investigated. We focused on the role of an AM fungus on mineral nutrition of wheat, and on its potential protective effect against Xanthomonas translucens. To address these issues, phenotypical, molecular and metabolomic approaches were combined. Morphological observations highlighted that AM wheat plants displayed an increased biomass and grain yield, as well as a reduction in lesion area following pathogen infection. To elucidate the molecular mechanisms underlying the mycorrhizal phenotype, we investigated changes of transcripts and proteins in roots and leaves during the double (wheat-AM fungus) and tripartite (wheat-AM fungus-pathogen) interaction. Transcriptomic and proteomic profiling identified the main pathways involved in enhancing plant biomass, mineral nutrition and in promoting the bio-protective effect against the leaf pathogen. Mineral and amino acid contents in roots, leaves and seeds, and protein oxidation profiles in leaves, supported the omics data, providing new insight into the mechanisms exerted by AM symbiosis to confer stronger productivity and enhanced resistance to X. translucens in wheat.
Collapse
Affiliation(s)
- Valentina Fiorilli
- Department of Life Sciences and Systems Biology, Università degli Studi di Torino, Viale P.A. Mattioli 25, 10125, Torino, Italy.
| | - Candida Vannini
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, via J.H. Dunant 3, 21100, Varese, Italy
| | - Francesca Ortolani
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, via J.H. Dunant 3, 21100, Varese, Italy
| | - Daniel Garcia-Seco
- IRD, Cirad, Univ. Montpellier, Interactions Plantes Microorganismes Environnement (IPME), 34394, Montpellier, France
| | - Marco Chiapello
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, via J.H. Dunant 3, 21100, Varese, Italy
| | - Mara Novero
- Department of Life Sciences and Systems Biology, Università degli Studi di Torino, Viale P.A. Mattioli 25, 10125, Torino, Italy
| | - Guido Domingo
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, via J.H. Dunant 3, 21100, Varese, Italy
| | - Valeria Terzi
- CREA-GB, Research Centre for Genomics and Bioinformatics, Via San Protaso 302, 29017, Fiorenzuola d'Arda, Italy
| | - Caterina Morcia
- CREA-GB, Research Centre for Genomics and Bioinformatics, Via San Protaso 302, 29017, Fiorenzuola d'Arda, Italy
| | - Paolo Bagnaresi
- CREA-GB, Research Centre for Genomics and Bioinformatics, Via San Protaso 302, 29017, Fiorenzuola d'Arda, Italy
| | - Lionel Moulin
- IRD, Cirad, Univ. Montpellier, Interactions Plantes Microorganismes Environnement (IPME), 34394, Montpellier, France
| | - Marcella Bracale
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, via J.H. Dunant 3, 21100, Varese, Italy
| | - Paola Bonfante
- Department of Life Sciences and Systems Biology, Università degli Studi di Torino, Viale P.A. Mattioli 25, 10125, Torino, Italy
| |
Collapse
|
52
|
Wang M, Wilde J, Baldwin IT, Groten K. Nicotiana attenuata's capacity to interact with arbuscular mycorrhiza alters its competitive ability and elicits major changes in the leaf transcriptome. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2018; 60:242-261. [PMID: 29087617 DOI: 10.1111/jipb.12609] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 10/27/2017] [Indexed: 06/07/2023]
Abstract
To study the local and systemic effects of arbuscular mycorrhizal fungal (AMF) colonization, Nicotiana attenuata plants impaired in their interactions with AMF due to silencing of a calcium- and calmodulin dependent protein kinase (inverted repreat (ir)CCaMK) were grown competitively in pairs with empty vector (EV) plants, with and without two different types of inoculum. When inoculated, EV plants strongly outperformed irCCaMK plants. Foliar transcript profiling revealed that AMF colonization significantly changed gene expression of P-starvation and -transporter genes in irCCaMK plants. The Pht1 family phosphate transporter NaPT5 was not only specifically induced in roots after AMF colonization, but also in leaves of AMF-colonized irCCaMK plants, and in plants grown under low Pi conditions in the absence of AMF. The P-starvation signature of inoculated irCCaMK plants corresponded with increases in selected amino acids and phenolic compounds in leaves. We also found a strong AMF-induced increase in amino acids and phenolic metabolites in roots. Plants impaired in their interactions with AMF clearly have a fitness disadvantage when competing for limited soil nutrients with a fully functional isogenic line. The additional role of the AMF-induced Pht1 family transporter NaPT5 in leaves under P-starvation conditions will require further experiments to fully resolve.
Collapse
Affiliation(s)
- Ming Wang
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, Jena 07745, Germany
| | - Julia Wilde
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, Jena 07745, Germany
| | - Ian T Baldwin
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, Jena 07745, Germany
| | - Karin Groten
- Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, Jena 07745, Germany
| |
Collapse
|