Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation
Cordia americana, C. saccelia and C. trichotoma are native trees of the subtropical Andean forests of Argentina. Due to their high value as a wood source, these species are under threat from the over-exploitation of their populations and from changes in land use. Knowledge of seed biology may contribute to clarifying their regeneration ecology and establishing management policies and conservation programmes. We studied seed mass, seed germination, seed desiccation tolerance and seed storage behaviour in seeds from different populations of each species. Seed mass differed among the populations of each species. For C. americana and C. saccelia, germination percentages (GP) varied among populations and light and temperature conditions. For all species and populations, GP was not affected by seed population or desiccation treatments, but the time to germination (t50) increased after drying. GP decreased and t50 increased in seeds stored with 8–10% MC at 35 °C for three months for all species and populations. Seeds stored with 8–10% MC at 20 °C and with 3–5% MC at 35 °C also showed deterioration depending on the species. Differences in germination requirements, desiccation tolerance and storage behaviour were not related to seed mass. These results indicate that (1) all Cordia species seeds show orthodox storage behaviour, (2) both moisture content and temperature are key factors in Cordia seed storage and (3) some populations within a species are more sensitive to desiccation and storage conditions than others. Thus, these species and populations could be preserved in seed banks, but the germination, desiccation and storage behaviour variability among populations must be considered before germination and storage protocols are established. This information will be very useful for designing restoration, reforestation, plant propagation and in situ and ex situ conservation programmes for these Cordia species.
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Format: | info:ar-repo/semantics/artículo biblioteca |
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Elsevier
2019-07
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Subjects: | Cordia, Organismos Indígenas, Utilización de la Tierra, Características de Semillas, Deshidratación, Indigenous Organisms, Land Use, Seed Characteristics, Dehydration, Argentina, Cordia americana, Cordia saccelia, Cordia trichotoma, Bosque Subtropical de Montaña, Argentina, |
Online Access: | http://hdl.handle.net/20.500.12123/5264 https://www.sciencedirect.com/science/article/pii/S0254629918321896 https://doi.org/10.1016/j.sajb.2019.03.029 |
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Cordia Organismos Indígenas Utilización de la Tierra Características de Semillas Deshidratación Indigenous Organisms Land Use Seed Characteristics Dehydration Argentina Cordia americana Cordia saccelia Cordia trichotoma Bosque Subtropical de Montaña, Argentina Cordia Organismos Indígenas Utilización de la Tierra Características de Semillas Deshidratación Indigenous Organisms Land Use Seed Characteristics Dehydration Argentina Cordia americana Cordia saccelia Cordia trichotoma Bosque Subtropical de Montaña, Argentina |
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Cordia Organismos Indígenas Utilización de la Tierra Características de Semillas Deshidratación Indigenous Organisms Land Use Seed Characteristics Dehydration Argentina Cordia americana Cordia saccelia Cordia trichotoma Bosque Subtropical de Montaña, Argentina Cordia Organismos Indígenas Utilización de la Tierra Características de Semillas Deshidratación Indigenous Organisms Land Use Seed Characteristics Dehydration Argentina Cordia americana Cordia saccelia Cordia trichotoma Bosque Subtropical de Montaña, Argentina Galindez, Guadalupe Ledesma Guaraz, Tilda Teresa Alvarez, Ana Carolina Pastrana Ignes, Valeria Andrea Bertuzzi, Tatiane Lindow López, Lucía Sühring, Silvia Susana Ortega Baes, Francisco Pablo Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation |
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Cordia americana, C. saccelia and C. trichotoma are native trees of the subtropical Andean forests of Argentina. Due to their high value as a wood source, these species are under threat from the over-exploitation of their populations and from changes in land use. Knowledge of seed biology may contribute to clarifying their regeneration ecology and establishing management policies and conservation programmes. We studied seed mass, seed germination, seed desiccation tolerance and seed storage behaviour in seeds from different populations of each species. Seed mass differed among the populations of each species. For C. americana and C. saccelia, germination percentages (GP) varied among populations and light and temperature conditions. For all species and populations, GP was not affected by seed population or desiccation treatments, but the time to germination (t50) increased after drying. GP decreased and t50 increased in seeds stored with 8–10% MC at 35 °C for three months for all species and populations. Seeds stored with 8–10% MC at 20 °C and with 3–5% MC at 35 °C also showed deterioration depending on the species. Differences in germination requirements, desiccation tolerance and storage behaviour were not related to seed mass. These results indicate that (1) all Cordia species seeds show orthodox storage behaviour, (2) both moisture content and temperature are key factors in Cordia seed storage and (3) some populations within a species are more sensitive to desiccation and storage conditions than others. Thus, these species and populations could be preserved in seed banks, but the germination, desiccation and storage behaviour variability among populations must be considered before germination and storage protocols are established. This information will be very useful for designing restoration, reforestation, plant propagation and in situ and ex situ conservation programmes for these Cordia species. |
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Cordia Organismos Indígenas Utilización de la Tierra Características de Semillas Deshidratación Indigenous Organisms Land Use Seed Characteristics Dehydration Argentina Cordia americana Cordia saccelia Cordia trichotoma Bosque Subtropical de Montaña, Argentina |
author |
Galindez, Guadalupe Ledesma Guaraz, Tilda Teresa Alvarez, Ana Carolina Pastrana Ignes, Valeria Andrea Bertuzzi, Tatiane Lindow López, Lucía Sühring, Silvia Susana Ortega Baes, Francisco Pablo |
author_facet |
Galindez, Guadalupe Ledesma Guaraz, Tilda Teresa Alvarez, Ana Carolina Pastrana Ignes, Valeria Andrea Bertuzzi, Tatiane Lindow López, Lucía Sühring, Silvia Susana Ortega Baes, Francisco Pablo |
author_sort |
Galindez, Guadalupe |
title |
Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation |
title_short |
Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation |
title_full |
Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation |
title_fullStr |
Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation |
title_full_unstemmed |
Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation |
title_sort |
intraspecific variation in seed germination and storage behaviour of cordia tree species of subtropical montane forests of argentina: implications for ex situ conservation |
publisher |
Elsevier |
publishDate |
2019-07 |
url |
http://hdl.handle.net/20.500.12123/5264 https://www.sciencedirect.com/science/article/pii/S0254629918321896 https://doi.org/10.1016/j.sajb.2019.03.029 |
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oai:localhost:20.500.12123-52642021-09-20T18:39:13Z Intraspecific variation in seed germination and storage behaviour of Cordia tree species of subtropical montane forests of Argentina: Implications for ex situ conservation Galindez, Guadalupe Ledesma Guaraz, Tilda Teresa Alvarez, Ana Carolina Pastrana Ignes, Valeria Andrea Bertuzzi, Tatiane Lindow López, Lucía Sühring, Silvia Susana Ortega Baes, Francisco Pablo Cordia Organismos Indígenas Utilización de la Tierra Características de Semillas Deshidratación Indigenous Organisms Land Use Seed Characteristics Dehydration Argentina Cordia americana Cordia saccelia Cordia trichotoma Bosque Subtropical de Montaña, Argentina Cordia americana, C. saccelia and C. trichotoma are native trees of the subtropical Andean forests of Argentina. Due to their high value as a wood source, these species are under threat from the over-exploitation of their populations and from changes in land use. Knowledge of seed biology may contribute to clarifying their regeneration ecology and establishing management policies and conservation programmes. We studied seed mass, seed germination, seed desiccation tolerance and seed storage behaviour in seeds from different populations of each species. Seed mass differed among the populations of each species. For C. americana and C. saccelia, germination percentages (GP) varied among populations and light and temperature conditions. For all species and populations, GP was not affected by seed population or desiccation treatments, but the time to germination (t50) increased after drying. GP decreased and t50 increased in seeds stored with 8–10% MC at 35 °C for three months for all species and populations. Seeds stored with 8–10% MC at 20 °C and with 3–5% MC at 35 °C also showed deterioration depending on the species. Differences in germination requirements, desiccation tolerance and storage behaviour were not related to seed mass. These results indicate that (1) all Cordia species seeds show orthodox storage behaviour, (2) both moisture content and temperature are key factors in Cordia seed storage and (3) some populations within a species are more sensitive to desiccation and storage conditions than others. Thus, these species and populations could be preserved in seed banks, but the germination, desiccation and storage behaviour variability among populations must be considered before germination and storage protocols are established. This information will be very useful for designing restoration, reforestation, plant propagation and in situ and ex situ conservation programmes for these Cordia species. EEA Yuto Fil: Galindez, Guadalupe. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Laboratorio de Investigaciones Botánicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Ledesma Guaraz, Tilda Teresa. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Yuto; Argentina Fil: Alvarez, Ana Carolina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos. Banco Base de Germoplasma; Argentina Fil: Pastrana Ignes, V. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Laboratorio de Investigaciones Botánicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Bertuzzi, Tatiane. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Laboratorio de Investigaciones Botánicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Catamarca. Centro de Investigaciones y Transferencia de Catamarca; Argentina Fil: Lindow López, Lucía. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Laboratorio de Investigaciones Botánicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Sühring, Silvia Susana. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Laboratorio de Investigaciones Botánicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Ortega Baes, Francisco Pablo. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Laboratorio de Investigaciones Botánicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2019-06-06T12:34:41Z 2019-06-06T12:34:41Z 2019-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/5264 https://www.sciencedirect.com/science/article/pii/S0254629918321896 0254-6299 https://doi.org/10.1016/j.sajb.2019.03.029 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier South African Journal of Botany 123 : 393-399 (July 2019) |