Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation

Autores
Hilal, Mirna Beatriz; Parrado, María Francisca; Rosa, Mariana Daniela; Gallardo, Miriam Rosa Angela; Massa, Edy Marta; Orce, Luis; González, Juan Antonio; Prado, Fernando Eduardo
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
UV-B radiation (280–320 nm) is harmful to living organisms and has detrimental effects on plant growth, development and physiology. In this work we examined some mechanisms involved in plant responses to UV-B radiation. Seedlings of quinoa (Chenopodium quinoa Willd.) were exposed to variable numbers of UV-B radiation doses, and the effect on cotyledons was studied. We analyzed (1) cotyledons anatomy and chloroplasts ultrastructure; (2) peroxidase activity involved in the lignification processes; and (3) content of photosynthetic pigments, phenolic compounds and carbohydrates. Exposure to two UV-B doses induced an increase in the wall thickness of epidermal cells, which was associated with lignin deposition and higher activity of the peroxidase. The chloroplast ultrastructure showed an appearance typical of plants under shade conditions, likely in response to reduced light penetration into the mesophyll cells due to the screening effect of epidermal lignin deposition. Exposure to UV-B radiation also led to (1) enhancement in the level of phenolics, which may serve a protective function; (2) strong increase in the fructose content, a fact that might be related to higher requirement of erythrose-4P as a substrate for the synthesis of lignin and phenolics; and (3) reduction in the chlorophyll concentration, evidencing alteration in the photosynthetic system. We propose that the observed lignin deposition in epidermal tissues of quinoa is a resistance mechanism against UV-B radiation, which allows growing of this species in Andean highlands.
Fil: Hilal, Mirna Beatriz. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto Miguel Lillo; Argentina
Fil: Parrado, María Francisca. Fundación Miguel Lillo; Argentina
Fil: Rosa, Mariana Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Fil: Gallardo, Miriam Rosa Angela. Fundación Miguel Lillo; Argentina
Fil: Massa, Edy Marta. Universidad Nacional de Tucumán; Argentina
Fil: Orce, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: González, Juan Antonio. Fundación Miguel Lillo; Argentina
Fil: Prado, Fernando Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Materia
QUINOA
UV-B
LIGNIN
CHLOROPLAST
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/100221
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/100221
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B RadiationHilal, Mirna BeatrizParrado, María FranciscaRosa, Mariana DanielaGallardo, Miriam Rosa AngelaMassa, Edy MartaOrce, LuisGonzález, Juan AntonioPrado, Fernando EduardoQUINOAUV-BLIGNINCHLOROPLASThttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1UV-B radiation (280–320 nm) is harmful to living organisms and has detrimental effects on plant growth, development and physiology. In this work we examined some mechanisms involved in plant responses to UV-B radiation. Seedlings of quinoa (Chenopodium quinoa Willd.) were exposed to variable numbers of UV-B radiation doses, and the effect on cotyledons was studied. We analyzed (1) cotyledons anatomy and chloroplasts ultrastructure; (2) peroxidase activity involved in the lignification processes; and (3) content of photosynthetic pigments, phenolic compounds and carbohydrates. Exposure to two UV-B doses induced an increase in the wall thickness of epidermal cells, which was associated with lignin deposition and higher activity of the peroxidase. The chloroplast ultrastructure showed an appearance typical of plants under shade conditions, likely in response to reduced light penetration into the mesophyll cells due to the screening effect of epidermal lignin deposition. Exposure to UV-B radiation also led to (1) enhancement in the level of phenolics, which may serve a protective function; (2) strong increase in the fructose content, a fact that might be related to higher requirement of erythrose-4P as a substrate for the synthesis of lignin and phenolics; and (3) reduction in the chlorophyll concentration, evidencing alteration in the photosynthetic system. We propose that the observed lignin deposition in epidermal tissues of quinoa is a resistance mechanism against UV-B radiation, which allows growing of this species in Andean highlands.Fil: Hilal, Mirna Beatriz. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto Miguel Lillo; ArgentinaFil: Parrado, María Francisca. Fundación Miguel Lillo; ArgentinaFil: Rosa, Mariana Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Gallardo, Miriam Rosa Angela. Fundación Miguel Lillo; ArgentinaFil: Massa, Edy Marta. Universidad Nacional de Tucumán; ArgentinaFil: Orce, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: González, Juan Antonio. Fundación Miguel Lillo; ArgentinaFil: Prado, Fernando Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaWiley Blackwell Publishing, Inc2007-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/100221Hilal, Mirna Beatriz; Parrado, María Francisca; Rosa, Mariana Daniela; Gallardo, Miriam Rosa Angela; Massa, Edy Marta; et al.; Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation; Wiley Blackwell Publishing, Inc; Photochemistry and Photobiology; 79; 2; 5-2007; 205-2100031-8655CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1751-1097.2004.tb00011.xinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1751-1097.2004.tb00011.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:15:04Zoai:ri.conicet.gov.ar:11336/100221instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:15:05.269CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
title Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
spellingShingle Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
Hilal, Mirna Beatriz
QUINOA
UV-B
LIGNIN
CHLOROPLAST
title_short Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
title_full Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
title_fullStr Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
title_full_unstemmed Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
title_sort Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation
dc.creator.none.fl_str_mv Hilal, Mirna Beatriz
Parrado, María Francisca
Rosa, Mariana Daniela
Gallardo, Miriam Rosa Angela
Massa, Edy Marta
Orce, Luis
González, Juan Antonio
Prado, Fernando Eduardo
author Hilal, Mirna Beatriz
author_facet Hilal, Mirna Beatriz
Parrado, María Francisca
Rosa, Mariana Daniela
Gallardo, Miriam Rosa Angela
Massa, Edy Marta
Orce, Luis
González, Juan Antonio
Prado, Fernando Eduardo
author_role author
author2 Parrado, María Francisca
Rosa, Mariana Daniela
Gallardo, Miriam Rosa Angela
Massa, Edy Marta
Orce, Luis
González, Juan Antonio
Prado, Fernando Eduardo
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv QUINOA
UV-B
LIGNIN
CHLOROPLAST
topic QUINOA
UV-B
LIGNIN
CHLOROPLAST
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv UV-B radiation (280–320 nm) is harmful to living organisms and has detrimental effects on plant growth, development and physiology. In this work we examined some mechanisms involved in plant responses to UV-B radiation. Seedlings of quinoa (Chenopodium quinoa Willd.) were exposed to variable numbers of UV-B radiation doses, and the effect on cotyledons was studied. We analyzed (1) cotyledons anatomy and chloroplasts ultrastructure; (2) peroxidase activity involved in the lignification processes; and (3) content of photosynthetic pigments, phenolic compounds and carbohydrates. Exposure to two UV-B doses induced an increase in the wall thickness of epidermal cells, which was associated with lignin deposition and higher activity of the peroxidase. The chloroplast ultrastructure showed an appearance typical of plants under shade conditions, likely in response to reduced light penetration into the mesophyll cells due to the screening effect of epidermal lignin deposition. Exposure to UV-B radiation also led to (1) enhancement in the level of phenolics, which may serve a protective function; (2) strong increase in the fructose content, a fact that might be related to higher requirement of erythrose-4P as a substrate for the synthesis of lignin and phenolics; and (3) reduction in the chlorophyll concentration, evidencing alteration in the photosynthetic system. We propose that the observed lignin deposition in epidermal tissues of quinoa is a resistance mechanism against UV-B radiation, which allows growing of this species in Andean highlands.
Fil: Hilal, Mirna Beatriz. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto Miguel Lillo; Argentina
Fil: Parrado, María Francisca. Fundación Miguel Lillo; Argentina
Fil: Rosa, Mariana Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Fil: Gallardo, Miriam Rosa Angela. Fundación Miguel Lillo; Argentina
Fil: Massa, Edy Marta. Universidad Nacional de Tucumán; Argentina
Fil: Orce, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina
Fil: González, Juan Antonio. Fundación Miguel Lillo; Argentina
Fil: Prado, Fernando Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
description UV-B radiation (280–320 nm) is harmful to living organisms and has detrimental effects on plant growth, development and physiology. In this work we examined some mechanisms involved in plant responses to UV-B radiation. Seedlings of quinoa (Chenopodium quinoa Willd.) were exposed to variable numbers of UV-B radiation doses, and the effect on cotyledons was studied. We analyzed (1) cotyledons anatomy and chloroplasts ultrastructure; (2) peroxidase activity involved in the lignification processes; and (3) content of photosynthetic pigments, phenolic compounds and carbohydrates. Exposure to two UV-B doses induced an increase in the wall thickness of epidermal cells, which was associated with lignin deposition and higher activity of the peroxidase. The chloroplast ultrastructure showed an appearance typical of plants under shade conditions, likely in response to reduced light penetration into the mesophyll cells due to the screening effect of epidermal lignin deposition. Exposure to UV-B radiation also led to (1) enhancement in the level of phenolics, which may serve a protective function; (2) strong increase in the fructose content, a fact that might be related to higher requirement of erythrose-4P as a substrate for the synthesis of lignin and phenolics; and (3) reduction in the chlorophyll concentration, evidencing alteration in the photosynthetic system. We propose that the observed lignin deposition in epidermal tissues of quinoa is a resistance mechanism against UV-B radiation, which allows growing of this species in Andean highlands.
publishDate 2007
dc.date.none.fl_str_mv 2007-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/100221
Hilal, Mirna Beatriz; Parrado, María Francisca; Rosa, Mariana Daniela; Gallardo, Miriam Rosa Angela; Massa, Edy Marta; et al.; Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation; Wiley Blackwell Publishing, Inc; Photochemistry and Photobiology; 79; 2; 5-2007; 205-210
0031-8655
CONICET Digital
CONICET
url http://hdl.handle.net/11336/100221
identifier_str_mv Hilal, Mirna Beatriz; Parrado, María Francisca; Rosa, Mariana Daniela; Gallardo, Miriam Rosa Angela; Massa, Edy Marta; et al.; Epidermal Lignin Deposition in Quinoa Cotyledons in Response to UV-B Radiation; Wiley Blackwell Publishing, Inc; Photochemistry and Photobiology; 79; 2; 5-2007; 205-210
0031-8655
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1751-1097.2004.tb00011.x
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1751-1097.2004.tb00011.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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