Wheat root trait plasticity, nutrient acquisition and growth responses are dependent on specific arbuscular mycorrhizal fungus and plant genotype interactions
| Autor: | Álvaro López-García, Fernando Borie, Pablo Cornejo, Sebastián Meier, Pedro Campos, Alex Seguel, Juan Antonio López-Ráez |
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| Přispěvatelé: | Agencia Nacional de Investigación y Desarrollo (Chile), Ministerio de Ciencia, Innovación y Universidades (España), Universidad de Jaén, European Commission, Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genotype Physiology Plant Science Fungus 01 natural sciences Plant Roots 03 medical and health sciences Nutrient Symbiosis Mycorrhizae Colonization Cultivar Mycorrhiza Glomeromycota Plant nutrition Triticum Rhizosphere biology fungi food and beverages Genetic Variation Root traits biology.organism_classification Adaptation Physiological Below-ground interactions Horticulture 030104 developmental biology Wheat Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | This study aimed to examine how interactions at both plant genotype and arbuscular mycorrhizal fungus species levels affected the expression of root traits and the subsequent effect on plant nutrition and growth. We used two wheat cultivars with contrasting phosphorus (P) acquisition efficiencies (Tukan and Crac) and two arbuscular mycorrhizal (AM) fungi (Rhizophagus intraradices and Claroideoglomus claroideum). Plant growth, as well as morphological and architectural root traits, were highly dependent on the myco-symbiotic partner in the case of the less P-acquisition efficient cultivar Tukan, with mycorrhizal responses ranging from -45 to 54 % with respect to non-mycorrhizal plants. Meanwhile, these responses were between only -7 and 5 % in the P-acquisition efficient cultivar Crac. The AM fungal species produced contrasting mechanisms in the improvement of plant nutrition and root trait responses. Colonization by R. intraradices increased Ca accumulation, regardless of the cultivar, but reduced root growth on Tukan plants. On the other hand, C. claroideum increased P content in both cultivars, with a concomitant increase in root growth and diffusion-based nutrient acquisition by Tukan. Moreover, plants in symbiosis with R. intraradices showed greater organic acid concentration in their rhizosphere compared to C. claroideum-colonized plants, especially Tukan (24 and 35 % more citrate and oxalate, respectively). Our results suggest that the responses in plant-AM fungal interactions related to nutrient dynamics are highly influenced at the fungus level and also by intra-specific variations in root traits at the genotype level, while growth responses related to improved nutrition depend on plant intrinsic acquisition efficiency. This work was supported by the Agencia Nacional de Investigacion y Desarrollo (ANID) Chile, grants ANID/FONDECYT/1170264, ANID/ FONDECYT/11160385, ANID/FONDAP/15130015, ANID/DOCTORADO NACIONAL/21161474, and ANID/PAI/T7817120011); and by Ministerio de Ciencia, Innovacion y Universidades [grant number RTI2018-094350-B-C31], Ministerio de Economia y Empresa [grant number AGL2015-64990-C2-1R], Plan Nacional de I+D+I [grant number CGL2015-69118-C2-2-P-COEXMED-II], Plan 6-UJA postdoctoral fellowship from University of Jaén (Spain); and the European Regional Development Fund (ERDF). |
| Databáze: | OpenAIRE |
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