The effect of light spectral quality on leaf senescence and oxidative stress in wheat

We have investigated the effects of deprivation of specific wavelengths on the induction of leaf senescence and oxidative metabolism in wheat. Excised leaves of 18-20-day-old plants were incubated in plastic boxes on distilled water and exposed to light filters with different ratios of red (R = 660...

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Autores principales: Causin, H.F., Jauregui, R.N., Barneix, A.J.
Formato: JOUR
Materias:
Catalase
Light spectral quality
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Chlorophyll
Metabolism
Optical filters
Oxidation
Plastic containers
Proteins
Radiation effects
Light spectral qualities
Crops
Chlorophylls
Farm Crops
Optical Filters
Plastic Containers
Radiation Effects
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01689452_v171_n1_p24_Causin
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01689452_v171_n1_p24_Causin
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spelling todo:paper_01689452_v171_n1_p24_Causin2023-10-03T15:06:49Z The effect of light spectral quality on leaf senescence and oxidative stress in wheat Causin, H.F. Jauregui, R.N. Barneix, A.J. Catalase Light spectral quality Oxidative stress Peroxidases Senescence Triticum aestivum Chlorophyll Metabolism Optical filters Oxidation Plastic containers Proteins Radiation effects Catalase Light spectral qualities Oxidative stress Peroxidases Senescence Triticum aestivum Crops Chlorophylls Farm Crops Optical Filters Oxidation Plastic Containers Proteins Radiation Effects Triticum aestivum We have investigated the effects of deprivation of specific wavelengths on the induction of leaf senescence and oxidative metabolism in wheat. Excised leaves of 18-20-day-old plants were incubated in plastic boxes on distilled water and exposed to light filters with different ratios of red (R = 660 nm) to far-red (FR = 730 nm) radiation (treatments red (R), R/FR = 0.84; green (G), R/FR = 0.12; or blue (B), R/FR = 0.13). Boxes with no added filters (white light treatment) or covered with black cardboard served as controls. Incubation in darkness induced a fast protein and chlorophyll degradation and oxidative stress development as compared to the white light (W) illuminated leaves. A decrement of the R/FR ratio failed to induce senescence symptoms in leaves exposed to the B light treatment, which behaved in a similar way as the white light control. Senescence symptoms developed to a similar extent under both the R and G light treatments. Our results indicate that light spectral quality affects the oxidative metabolism of wheat leaves, and that blue light can specifically delay the onset of senescence in shaded leaves. The effects of incubation on benzylaminopurine (BAP), LaCl3 (a Ca2+ channel blocker), or salicylhydroxamic acid (SHAM) suggest that blue light prevents senescence by maintaining high levels of catalase activity. © 2006 Elsevier Ireland Ltd. All rights reserved. Fil:Causin, H.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Barneix, A.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01689452_v171_n1_p24_Causin
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Catalase
Light spectral quality
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Chlorophyll
Metabolism
Optical filters
Oxidation
Plastic containers
Proteins
Radiation effects
Catalase
Light spectral qualities
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Crops
Chlorophylls
Farm Crops
Optical Filters
Oxidation
Plastic Containers
Proteins
Radiation Effects
Triticum aestivum
spellingShingle Catalase
Light spectral quality
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Chlorophyll
Metabolism
Optical filters
Oxidation
Plastic containers
Proteins
Radiation effects
Catalase
Light spectral qualities
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Crops
Chlorophylls
Farm Crops
Optical Filters
Oxidation
Plastic Containers
Proteins
Radiation Effects
Triticum aestivum
Causin, H.F.
Jauregui, R.N.
Barneix, A.J.
The effect of light spectral quality on leaf senescence and oxidative stress in wheat
topic_facet Catalase
Light spectral quality
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Chlorophyll
Metabolism
Optical filters
Oxidation
Plastic containers
Proteins
Radiation effects
Catalase
Light spectral qualities
Oxidative stress
Peroxidases
Senescence
Triticum aestivum
Crops
Chlorophylls
Farm Crops
Optical Filters
Oxidation
Plastic Containers
Proteins
Radiation Effects
Triticum aestivum
description We have investigated the effects of deprivation of specific wavelengths on the induction of leaf senescence and oxidative metabolism in wheat. Excised leaves of 18-20-day-old plants were incubated in plastic boxes on distilled water and exposed to light filters with different ratios of red (R = 660 nm) to far-red (FR = 730 nm) radiation (treatments red (R), R/FR = 0.84; green (G), R/FR = 0.12; or blue (B), R/FR = 0.13). Boxes with no added filters (white light treatment) or covered with black cardboard served as controls. Incubation in darkness induced a fast protein and chlorophyll degradation and oxidative stress development as compared to the white light (W) illuminated leaves. A decrement of the R/FR ratio failed to induce senescence symptoms in leaves exposed to the B light treatment, which behaved in a similar way as the white light control. Senescence symptoms developed to a similar extent under both the R and G light treatments. Our results indicate that light spectral quality affects the oxidative metabolism of wheat leaves, and that blue light can specifically delay the onset of senescence in shaded leaves. The effects of incubation on benzylaminopurine (BAP), LaCl3 (a Ca2+ channel blocker), or salicylhydroxamic acid (SHAM) suggest that blue light prevents senescence by maintaining high levels of catalase activity. © 2006 Elsevier Ireland Ltd. All rights reserved.
format JOUR
author Causin, H.F.
Jauregui, R.N.
Barneix, A.J.
author_facet Causin, H.F.
Jauregui, R.N.
Barneix, A.J.
author_sort Causin, H.F.
title The effect of light spectral quality on leaf senescence and oxidative stress in wheat
title_short The effect of light spectral quality on leaf senescence and oxidative stress in wheat
title_full The effect of light spectral quality on leaf senescence and oxidative stress in wheat
title_fullStr The effect of light spectral quality on leaf senescence and oxidative stress in wheat
title_full_unstemmed The effect of light spectral quality on leaf senescence and oxidative stress in wheat
title_sort effect of light spectral quality on leaf senescence and oxidative stress in wheat
url http://hdl.handle.net/20.500.12110/paper_01689452_v171_n1_p24_Causin
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