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| 1. |  | TEIXEIRA, D.; MAUS, D.; DIULIE ALMANSA, D.; HUFF, F.; LEONARDI, F. L.; BEVILAQUA, G. A. P.; ANTUNES, I. F.; BERNARDO, J. T.; RODRIGUES, L. A.; BILHA, M.; BERNARDO, M. A. T.; LUDKE, M. S. R.; LUDTKE, R. C.; PETRY, S.; SCHIAVON, T. Guardiãs e guardiões de sementes crioulas. Nova Xavantina: Pantanal, 2022. 37 p.| Biblioteca(s): Embrapa Clima Temperado. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
17/11/2020 |
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Data da última atualização: |
17/11/2020 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
SEAL, C. E.; DANTAS, B. F. |
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Afiliação: |
CHARLOTTE E. SEAL; BARBARA FRANCA DANTAS, CPATSA. |
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Título: |
Germination functional traits in seeds of halophytes. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
In: GRIGORE, M. N. (Ed.). Handbook of halophytes. Cham: Springer, 2020. |
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ISBN: |
978-3-030-17854-3 |
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DOI: |
https://doi.org/10.1007/978-3-030-17854-3_50-1 |
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Idioma: |
Inglês |
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Conteúdo: |
Many families of halophytes rely on seeds for their natural regeneration. As a functional trait, germination is highly responsive to the environment including salinity. For some halophyte species, their seeds may avoid periods of high salinity through dormancy, which may be present in only one seed morph in species with heteromorphic seeds, and can be influenced by the maternal environment and transgenerational effects. Avoidance strategies are plastic and can vary among and within species as well as with habitat. Other species of halophytes are highly tolerant to salinity, with germination occurring in conditions more than twice the concentration of sodium chloride found in seawater, utilizing physiological mechanisms such as ion compartmentalization and osmotic adjustment. However, these strategies are not exclusive to halophytes and are sometimes found in germinating seeds of salt-tolerant non-halophytes. Quantification of the germination niche to the environment can be made using the population-based germination models thermal time (temperature), hydro time (water potential), and halo time (salinity). These models estimate environmental thresholds to germination and germination rate changes with the environment. Of the few examples of applying these models to salinity, the germination of halophytes appears no more tolerant to salinity than non-halophytes. More frequent application of these models is required to build a global view. As demonstrated by a case study in the Brazilian Caatinga (a semiarid ecosystem), validation of these germination models in situ, combined with climate and soil data, can be used to predict germination responses to climate change. MenosMany families of halophytes rely on seeds for their natural regeneration. As a functional trait, germination is highly responsive to the environment including salinity. For some halophyte species, their seeds may avoid periods of high salinity through dormancy, which may be present in only one seed morph in species with heteromorphic seeds, and can be influenced by the maternal environment and transgenerational effects. Avoidance strategies are plastic and can vary among and within species as well as with habitat. Other species of halophytes are highly tolerant to salinity, with germination occurring in conditions more than twice the concentration of sodium chloride found in seawater, utilizing physiological mechanisms such as ion compartmentalization and osmotic adjustment. However, these strategies are not exclusive to halophytes and are sometimes found in germinating seeds of salt-tolerant non-halophytes. Quantification of the germination niche to the environment can be made using the population-based germination models thermal time (temperature), hydro time (water potential), and halo time (salinity). These models estimate environmental thresholds to germination and germination rate changes with the environment. Of the few examples of applying these models to salinity, the germination of halophytes appears no more tolerant to salinity than non-halophytes. More frequent application of these models is required to build a global view. As demonstrated by a case study in the ... Mostrar Tudo |
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Palavras-Chave: |
Planta halofita; Traços funcionais. |
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Thesagro: |
Germinação; Salinidade; Semente. |
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Thesaurus NAL: |
Halophytes. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02365naa a2200229 a 4500
001 2126656
005 2020-11-17
008 2020 bl uuuu u00u1 u #d
020 $a978-3-030-17854-3
024 7 $ahttps://doi.org/10.1007/978-3-030-17854-3_50-1$2DOI
100 1 $aSEAL, C. E.
245 $aGermination functional traits in seeds of halophytes.$h[electronic resource]
260 $c2020
520 $aMany families of halophytes rely on seeds for their natural regeneration. As a functional trait, germination is highly responsive to the environment including salinity. For some halophyte species, their seeds may avoid periods of high salinity through dormancy, which may be present in only one seed morph in species with heteromorphic seeds, and can be influenced by the maternal environment and transgenerational effects. Avoidance strategies are plastic and can vary among and within species as well as with habitat. Other species of halophytes are highly tolerant to salinity, with germination occurring in conditions more than twice the concentration of sodium chloride found in seawater, utilizing physiological mechanisms such as ion compartmentalization and osmotic adjustment. However, these strategies are not exclusive to halophytes and are sometimes found in germinating seeds of salt-tolerant non-halophytes. Quantification of the germination niche to the environment can be made using the population-based germination models thermal time (temperature), hydro time (water potential), and halo time (salinity). These models estimate environmental thresholds to germination and germination rate changes with the environment. Of the few examples of applying these models to salinity, the germination of halophytes appears no more tolerant to salinity than non-halophytes. More frequent application of these models is required to build a global view. As demonstrated by a case study in the Brazilian Caatinga (a semiarid ecosystem), validation of these germination models in situ, combined with climate and soil data, can be used to predict germination responses to climate change.
650 $aHalophytes
650 $aGerminação
650 $aSalinidade
650 $aSemente
653 $aPlanta halofita
653 $aTraços funcionais
700 1 $aDANTAS, B. F.
773 $tIn: GRIGORE, M. N. (Ed.). Handbook of halophytes. Cham: Springer, 2020.
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