Seed germination and phenotypic responses to water restriction of Beilschmiedia miersii provenances
We assessed the effect of seed provenance on seed germination traits, seedling growth, biomass allocation, presence of cotyledons, and survival responses of the endemic Beilschmiedia miersii cultivated under two water treatments (well‐ watered versus water stress, average pre‐dawn plant water potentials of ‐0.9 and ‐4.5 MPa). Provenances from the southern range of the species had a better germination performance whereas the coastal and interior provenances were not able to survive in large number to the seedling stage. The provenance El Arbol, exhibited a higher survival, growth, presence of cotyledons, and biomass traits. This provenance also exhibited a higher presence of cotyledons in both watering treatments and an unaltered root to shoot ratio between the well‐ watered and the water stress treatments. We found important phenotypic variation for seed germination and seedling survival associated to the provenance origin, emphasizing the importance of a nursery‐evaluation phase before the beginning of restoration projects at the landscape level. Keywords: provenance origin, water restriction, restricted range species, Mediterranean‐type ecosystems, recruitment, restoration ID: 3624060
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| Format: | Article biblioteca |
| Language: | English |
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FAO ;
2022
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| Online Access: | https://openknowledge.fao.org/handle/20.500.14283/CC1009EN http://www.fao.org/3/cc1009en/cc1009en.pdf |
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| Summary: | We assessed the effect of seed provenance on seed germination traits, seedling growth, biomass allocation, presence of cotyledons, and survival responses of the endemic Beilschmiedia miersii cultivated under two water treatments (well‐ watered versus water stress, average pre‐dawn plant water potentials of ‐0.9 and ‐4.5 MPa). Provenances from the southern range of the species had a better germination performance whereas the coastal and interior provenances were not able to survive in large number to the seedling stage. The provenance El Arbol, exhibited a higher survival, growth, presence of cotyledons, and biomass traits. This provenance also exhibited a higher presence of cotyledons in both watering treatments and an unaltered root to shoot ratio between the well‐ watered and the water stress treatments. We found important phenotypic variation for seed germination and seedling survival associated to the provenance origin, emphasizing the importance of a nursery‐evaluation phase before the beginning of restoration projects at the landscape level.
Keywords: provenance origin, water restriction, restricted range species, Mediterranean‐type ecosystems, recruitment, restoration
ID: 3624060 |
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