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| 2. |  | MENEZES, E. A.; SANTOS, M. X. dos; MORGADO, L. B.; QUEIROZ, M. A. de; LOPES, L. H. de O.; AZEVEDO, D. M. P. de; HOLANDA, P. E. M. de; CHAGAS, A. J. de C.; COSTA, O. F. da. Manual técnico de consórcio. Petrolina: EMBRAPA-CPATSA, 1980. 71 p.| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 2 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Agroenergia; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Semiárido. |
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Data corrente: |
15/12/2023 |
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Data da última atualização: |
12/03/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
AIDAR, S. de T.; CHAVES, A. R. de M.; FERNANDES JUNIOR, P. I.; MORGANTE, C. V. |
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Afiliação: |
SAULO DE TARSO AIDAR, CPATSA; AGNALDO RODRIGUES DE MELO CHAVES, CPATSA; PAULO IVAN FERNANDES JUNIOR, CPATSA; CAROLINA VIANNA MORGANTE, CPATSA / Cenargen. |
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Título: |
Ferns and Lycophytes as new challenges: physiological and biochemical changes in desiccation and rehydration cycles of Selaginella convoluta (Selaginellaceae). |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Rodriguésia, v. 74, e00672023, 2023. |
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DOI: |
http://dx.doi.org/10.1590/2175-7860202374088 |
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Idioma: |
Inglês |
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Conteúdo: |
Vegetative desiccation tolerance (VDT) is a biological process that allows resurrection plants to complete desiccation-rehydration cycles and survive without permanent damage. Physiological and biochemical changes related to the VDT were evaluated in the lycophyte Selaginella convoluta from the Caatinga biome, a seasonally dry tropical forest of northeastern Brazil. As representative of the oldest division of extant vascular plants, the investigation of VDT mechanisms in this species serves as an opportunity to provide information for research communities interested in functional traits related to water-limited conditions. The experiments were performed with plants in their natural habitat, in dry and rainy seasons, and in pots under shade house conditions. Relative water content, chlorophyll a fluorescence, gas exchange, activity of antioxidant enzymes, concentration of chlorophylls, proteins, total amino acids, proline, and soluble carbohydrates in leaf tissues were evaluated throughout the process of complete dehydration and subsequent re-watering of intact plants. The overall results reveal the capacity of S. convoluta to tolerate extreme dehydration and rapidly recover upon rehydration. This species minimizes potential damages during the desiccation-rehydration cycle due to the presence of inductive mechanisms (photochemical preventing, sucrose accumulation) and constitutive mechanisms (antioxidant activity of catalase and ascorbate peroxidase), which share similarities with the VDT of both angiosperms and bryophytes. MenosVegetative desiccation tolerance (VDT) is a biological process that allows resurrection plants to complete desiccation-rehydration cycles and survive without permanent damage. Physiological and biochemical changes related to the VDT were evaluated in the lycophyte Selaginella convoluta from the Caatinga biome, a seasonally dry tropical forest of northeastern Brazil. As representative of the oldest division of extant vascular plants, the investigation of VDT mechanisms in this species serves as an opportunity to provide information for research communities interested in functional traits related to water-limited conditions. The experiments were performed with plants in their natural habitat, in dry and rainy seasons, and in pots under shade house conditions. Relative water content, chlorophyll a fluorescence, gas exchange, activity of antioxidant enzymes, concentration of chlorophylls, proteins, total amino acids, proline, and soluble carbohydrates in leaf tissues were evaluated throughout the process of complete dehydration and subsequent re-watering of intact plants. The overall results reveal the capacity of S. convoluta to tolerate extreme dehydration and rapidly recover upon rehydration. This species minimizes potential damages during the desiccation-rehydration cycle due to the presence of inductive mechanisms (photochemical preventing, sucrose accumulation) and constitutive mechanisms (antioxidant activity of catalase and ascorbate peroxidase), which share similarities... Mostrar Tudo |
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Palavras-Chave: |
Bioma Caatinga; Característica funcional; Características funcionais; Dessecação vegetativa; Estratégia de sobrevivência; Planta de ressurreição; Resistência à desidratação. |
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Thesagro: |
Caatinga; Samambaia. |
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Thesaurus NAL: |
Selaginella. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159794/1/Ferns-and-Lycophytes-as-new-challenges-physiological-and-biochemical-changes-in-desiccation-and-rehydration-cycles-of-Selaginella-convoluta.pdf
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Marc: |
LEADER 02537naa a2200289 a 4500
001 2159794
005 2024-03-12
008 2023 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/2175-7860202374088$2DOI
100 1 $aAIDAR, S. de T.
245 $aFerns and Lycophytes as new challenges$bphysiological and biochemical changes in desiccation and rehydration cycles of Selaginella convoluta (Selaginellaceae).$h[electronic resource]
260 $c2023
520 $aVegetative desiccation tolerance (VDT) is a biological process that allows resurrection plants to complete desiccation-rehydration cycles and survive without permanent damage. Physiological and biochemical changes related to the VDT were evaluated in the lycophyte Selaginella convoluta from the Caatinga biome, a seasonally dry tropical forest of northeastern Brazil. As representative of the oldest division of extant vascular plants, the investigation of VDT mechanisms in this species serves as an opportunity to provide information for research communities interested in functional traits related to water-limited conditions. The experiments were performed with plants in their natural habitat, in dry and rainy seasons, and in pots under shade house conditions. Relative water content, chlorophyll a fluorescence, gas exchange, activity of antioxidant enzymes, concentration of chlorophylls, proteins, total amino acids, proline, and soluble carbohydrates in leaf tissues were evaluated throughout the process of complete dehydration and subsequent re-watering of intact plants. The overall results reveal the capacity of S. convoluta to tolerate extreme dehydration and rapidly recover upon rehydration. This species minimizes potential damages during the desiccation-rehydration cycle due to the presence of inductive mechanisms (photochemical preventing, sucrose accumulation) and constitutive mechanisms (antioxidant activity of catalase and ascorbate peroxidase), which share similarities with the VDT of both angiosperms and bryophytes.
650 $aSelaginella
650 $aCaatinga
650 $aSamambaia
653 $aBioma Caatinga
653 $aCaracterística funcional
653 $aCaracterísticas funcionais
653 $aDessecação vegetativa
653 $aEstratégia de sobrevivência
653 $aPlanta de ressurreição
653 $aResistência à desidratação
700 1 $aCHAVES, A. R. de M.
700 1 $aFERNANDES JUNIOR, P. I.
700 1 $aMORGANTE, C. V.
773 $tRodriguésia$gv. 74, e00672023, 2023.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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