Seasonal variation in AMF colonisation, soil and plant nutrient content in gypsum specialist and generalist species growing in P-poor soils
| Autor: | Sara Palacio, Susana Rodríguez-Echeverría, Andreu Cera, Estephania Duplat, Antonio Gómez-Bolea, Gabriel Montserrat-Martí |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Leaves Ecosistemes Soil Science Plant Science Fulles Generalist and specialist species 010603 evolutionary biology 01 natural sciences Nutrient Vegetació Sòls àrids Organic matter 2. Zero hunger Mutualism (biology) chemistry.chemical_classification Arid soils Vegetation Ecology biology Plant physiology Biotic communities 15. Life on land biology.organism_classification Ecologia Colonisation Arbuscular mycorrhiza Agronomy chemistry Soil water 010606 plant biology & botany |
| Zdroj: | Dipòsit Digital de la UB Universidad de Barcelona |
| ISSN: | 1573-5036 0032-079X |
| Popis: | Aims Gypsum soils are P-limited atypical soils that harbour a rich endemic flora. These singular soils are usually found in drylands, where plant activity and soil nutrient availability are seasonal. No previous studies have analysed the seasonality of P nutrition and its interaction with the arbuscular mycorrhiza fungi (AMF) colonisation in gypsum plants. Our aim was to evaluate the seasonal changes in plant nutrient status, AMF colonisation and rhizospheric soil nutrient availability in gypsum specialist and generalist species. Methods We evaluated seasonal variation in the proportion of root length colonised by AMF structures (hyphae, vesicules and arbuscules), plant nutrient status (leaf C, N and P and fine root C and N) and rhizospheric soil content (P, organic matter, nitrate and ammonium) of three gypsum specialists and two generalists throughout a year. Results All species showed arbuscules within roots, including species of Caryophyllaceae and Brassicaceae. Root colonisation by arbuscules (AC) was higher in spring than in other seasons, when plants showed high leaf P-requirements. Higher AC was decoupled from inorganic N and P availability in rhizospheric soil, and foliar nutrient content. Generalists showed higher AC than specialists, but only in spring. Conclusions Seasonality was found in AMF colonisation, rhizospheric soil content and plant nutrient status. The mutualism between plants and AMF was highest in spring, when P-requirements are higher for plants, especially in generalists. However, AMF decoupled from plant demands in autumn, when nutrient availability increases in rhizospheric soil. |
| Databáze: | OpenAIRE |
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