Lignin is a good predictor of resistance species to water stress?
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2015 |
| Tipo de documento: | Dissertação |
| Idioma: | por |
| Título da fonte: | Biblioteca Digital de Teses e Dissertações da UFC |
| Texto Completo: | http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14883 |
Resumo: | Tropical plant species resist seasonal drought by avoidance or tolerance, keeping or losing leaves, respectively. Since drought resistance is influenced by wood attributes and lignin is a major component of wood, we investigated whether lignin is related to foliar retention time (LR). We selected 22 species, determined the stem lignin content by thioglycolic acid and quantified guaiacyl (G) and syringyl (S) monomers by thioacidolysis and GC-MS analysis. Among these species, we selected 15 species to measure vulnerability to embolism by pneumatic method. In our analyses, were considered measures of wood density, stem water saturation and stem water potential in the dry season, published by other authors. Our analyses showed that there are two ways of surviving drought. A small group of species, for which the lignin does not seem to matter, stores water in the stem and loses leaves right at the end of the rainy season. A large group of species, from early deciduous to evergreens, retains leaves in the dry season for increasingly longer periods the higher the S/G ratio is. Higher values of the S/G ratio allow greater LR by reducing vulnerability to embolism. |
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info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisLignin is a good predictor of resistance species to water stress?Lignina à um bom preditor da resistÃncia de espÃcies ao estresse hÃdrico?2015-02-26Francisca Soares de AraÃjo02589658745http://lattes.cnpq.br/7277684979819031Waldir Mantovani03115158866http://lattes.cnpq.br/3432888745867708 Roberta Boscaini Zandavalli70957681020http://lattes.cnpq.br/112182702240609709023254422http://lattes.cnpq.br/6598589431108681Taysla Roberta Almeida de LimaUniversidade Federal do CearÃPrograma de PÃs-GraduaÃÃo em Ecologia e Recursos NaturaisUFCBRAtributos da madeira Guaiacil Sempre verdes Siringil Vulnerabilidade ao embolismoEstresse hÃdricoEvergreen Guaiacyl Syringyl Vulnerability to embolism Wood traitsECOLOGIATropical plant species resist seasonal drought by avoidance or tolerance, keeping or losing leaves, respectively. Since drought resistance is influenced by wood attributes and lignin is a major component of wood, we investigated whether lignin is related to foliar retention time (LR). We selected 22 species, determined the stem lignin content by thioglycolic acid and quantified guaiacyl (G) and syringyl (S) monomers by thioacidolysis and GC-MS analysis. Among these species, we selected 15 species to measure vulnerability to embolism by pneumatic method. In our analyses, were considered measures of wood density, stem water saturation and stem water potential in the dry season, published by other authors. Our analyses showed that there are two ways of surviving drought. A small group of species, for which the lignin does not seem to matter, stores water in the stem and loses leaves right at the end of the rainy season. A large group of species, from early deciduous to evergreens, retains leaves in the dry season for increasingly longer periods the higher the S/G ratio is. Higher values of the S/G ratio allow greater LR by reducing vulnerability to embolism.EspÃcies de plantas de clima tropical sazonalmente resistem à seca por tolerÃncia ou evitaÃÃo, mantendo ou perdendo folhas, respectivamente. Atributos da madeira estÃo relacionados à resistÃncia à seca e a lignina à um dos principais componentes da madeira. Investigamos se a lignina està relacionada ao tempo de retenÃÃo foliar (LR). Selecionamos 22 espÃcies, determinamos o teor de lignina do caule pelo Ãcido tioglicÃlico e quantificamos os monÃmeros guaiacil (G) e siringil (S) by thioacidolysis e GC-MS analysis. Dentre as espÃcies, selecionamos 15 espÃcies para medir a vulnerabilidade ao embolismo pelo mÃtodo pneumÃtico. IncluÃmos medidas da densidade da madeira, saturaÃÃo de Ãgua no caule e potencial hÃdrico do caule na estaÃÃo seca, publicadas por outros autores. Nossas anÃlises mostraram haver duas maneiras de sobreviver à seca. Um pequeno grupo de espÃcies, para as quais a lignina parece nÃo ter importÃncia, armazena Ãgua no caule e perde folhas logo no final da estaÃÃo chuvosa. Um grande grupo de espÃcies, que vÃo desde decÃduas precoces atà sempre verdes, retÃm folhas na estaÃÃo seca por tempos cada vez mais longos quanto maior a razÃo S/G. Maiores valores da razÃo S/G permitem maior LR por diminuir a vulnerabilidade ao embolismo.FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgicohttp://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14883application/pdfinfo:eu-repo/semantics/openAccessporreponame:Biblioteca Digital de Teses e Dissertações da UFCinstname:Universidade Federal do Cearáinstacron:UFC2019-01-21T11:28:46Zmail@mail.com - |
| dc.title.en.fl_str_mv |
Lignin is a good predictor of resistance species to water stress? |
| dc.title.alternative.pt.fl_str_mv |
Lignina à um bom preditor da resistÃncia de espÃcies ao estresse hÃdrico? |
| title |
Lignin is a good predictor of resistance species to water stress? |
| spellingShingle |
Lignin is a good predictor of resistance species to water stress? Taysla Roberta Almeida de Lima Atributos da madeira Guaiacil Sempre verdes Siringil Vulnerabilidade ao embolismo Estresse hÃdrico Evergreen Guaiacyl Syringyl Vulnerability to embolism Wood traits ECOLOGIA |
| title_short |
Lignin is a good predictor of resistance species to water stress? |
| title_full |
Lignin is a good predictor of resistance species to water stress? |
| title_fullStr |
Lignin is a good predictor of resistance species to water stress? |
| title_full_unstemmed |
Lignin is a good predictor of resistance species to water stress? |
| title_sort |
Lignin is a good predictor of resistance species to water stress? |
| author |
Taysla Roberta Almeida de Lima |
| author_facet |
Taysla Roberta Almeida de Lima |
| author_role |
author |
| dc.contributor.advisor1.fl_str_mv |
Francisca Soares de AraÃjo |
| dc.contributor.advisor1ID.fl_str_mv |
02589658745 |
| dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7277684979819031 |
| dc.contributor.referee1.fl_str_mv |
Waldir Mantovani |
| dc.contributor.referee1ID.fl_str_mv |
03115158866 |
| dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/3432888745867708 |
| dc.contributor.referee2.fl_str_mv |
Roberta Boscaini Zandavalli |
| dc.contributor.referee2ID.fl_str_mv |
70957681020 |
| dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/1121827022406097 |
| dc.contributor.authorID.fl_str_mv |
09023254422 |
| dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6598589431108681 |
| dc.contributor.author.fl_str_mv |
Taysla Roberta Almeida de Lima |
| contributor_str_mv |
Francisca Soares de AraÃjo Waldir Mantovani Roberta Boscaini Zandavalli |
| dc.subject.por.fl_str_mv |
Atributos da madeira Guaiacil Sempre verdes Siringil Vulnerabilidade ao embolismo Estresse hÃdrico |
| topic |
Atributos da madeira Guaiacil Sempre verdes Siringil Vulnerabilidade ao embolismo Estresse hÃdrico Evergreen Guaiacyl Syringyl Vulnerability to embolism Wood traits ECOLOGIA |
| dc.subject.eng.fl_str_mv |
Evergreen Guaiacyl Syringyl Vulnerability to embolism Wood traits |
| dc.subject.cnpq.fl_str_mv |
ECOLOGIA |
| dc.description.sponsorship.fl_txt_mv |
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico |
| dc.description.abstract.por.fl_txt_mv |
Tropical plant species resist seasonal drought by avoidance or tolerance, keeping or losing leaves, respectively. Since drought resistance is influenced by wood attributes and lignin is a major component of wood, we investigated whether lignin is related to foliar retention time (LR). We selected 22 species, determined the stem lignin content by thioglycolic acid and quantified guaiacyl (G) and syringyl (S) monomers by thioacidolysis and GC-MS analysis. Among these species, we selected 15 species to measure vulnerability to embolism by pneumatic method. In our analyses, were considered measures of wood density, stem water saturation and stem water potential in the dry season, published by other authors. Our analyses showed that there are two ways of surviving drought. A small group of species, for which the lignin does not seem to matter, stores water in the stem and loses leaves right at the end of the rainy season. A large group of species, from early deciduous to evergreens, retains leaves in the dry season for increasingly longer periods the higher the S/G ratio is. Higher values of the S/G ratio allow greater LR by reducing vulnerability to embolism. EspÃcies de plantas de clima tropical sazonalmente resistem à seca por tolerÃncia ou evitaÃÃo, mantendo ou perdendo folhas, respectivamente. Atributos da madeira estÃo relacionados à resistÃncia à seca e a lignina à um dos principais componentes da madeira. Investigamos se a lignina està relacionada ao tempo de retenÃÃo foliar (LR). Selecionamos 22 espÃcies, determinamos o teor de lignina do caule pelo Ãcido tioglicÃlico e quantificamos os monÃmeros guaiacil (G) e siringil (S) by thioacidolysis e GC-MS analysis. Dentre as espÃcies, selecionamos 15 espÃcies para medir a vulnerabilidade ao embolismo pelo mÃtodo pneumÃtico. IncluÃmos medidas da densidade da madeira, saturaÃÃo de Ãgua no caule e potencial hÃdrico do caule na estaÃÃo seca, publicadas por outros autores. Nossas anÃlises mostraram haver duas maneiras de sobreviver à seca. Um pequeno grupo de espÃcies, para as quais a lignina parece nÃo ter importÃncia, armazena Ãgua no caule e perde folhas logo no final da estaÃÃo chuvosa. Um grande grupo de espÃcies, que vÃo desde decÃduas precoces atà sempre verdes, retÃm folhas na estaÃÃo seca por tempos cada vez mais longos quanto maior a razÃo S/G. Maiores valores da razÃo S/G permitem maior LR por diminuir a vulnerabilidade ao embolismo. |
| description |
Tropical plant species resist seasonal drought by avoidance or tolerance, keeping or losing leaves, respectively. Since drought resistance is influenced by wood attributes and lignin is a major component of wood, we investigated whether lignin is related to foliar retention time (LR). We selected 22 species, determined the stem lignin content by thioglycolic acid and quantified guaiacyl (G) and syringyl (S) monomers by thioacidolysis and GC-MS analysis. Among these species, we selected 15 species to measure vulnerability to embolism by pneumatic method. In our analyses, were considered measures of wood density, stem water saturation and stem water potential in the dry season, published by other authors. Our analyses showed that there are two ways of surviving drought. A small group of species, for which the lignin does not seem to matter, stores water in the stem and loses leaves right at the end of the rainy season. A large group of species, from early deciduous to evergreens, retains leaves in the dry season for increasingly longer periods the higher the S/G ratio is. Higher values of the S/G ratio allow greater LR by reducing vulnerability to embolism. |
| publishDate |
2015 |
| dc.date.issued.fl_str_mv |
2015-02-26 |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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publishedVersion |
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masterThesis |
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http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14883 |
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http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14883 |
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por |
| language |
por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal do Cearà |
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Programa de PÃs-GraduaÃÃo em Ecologia e Recursos Naturais |
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UFC |
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BR |
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Universidade Federal do Cearà |
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