Evidence of UVB differential response in Sophora microphylla from shady and sunny places

The effect of the supplemental UVB radiation in forest species was studied in Sophora microphylla, a native tree that grow at low latitudes in the Central-South of Chile and important by their association with soil bacteria and mycorhizal fungi. Seeds of sun and shade variety growing at different li...

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Autores principales:	Hess,Susan, Alvarez,José Luis, Iturra,Griselda, Romero,Magdalena
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2002
Materias:	UVB stress germination seedling growth pigments Sophora microphylla
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000400022
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spelling	oai:scielo:S0366-164420020004000222009-12-18Evidence of UVB differential response in Sophora microphylla from shady and sunny placesHess,SusanAlvarez,José LuisIturra,GriseldaRomero,Magdalena UVB stress germination seedling growth pigments Sophora microphylla The effect of the supplemental UVB radiation in forest species was studied in Sophora microphylla, a native tree that grow at low latitudes in the Central-South of Chile and important by their association with soil bacteria and mycorhizal fungi. Seeds of sun and shade variety growing at different light intensities were collected. Using indoor supplemental UVB radiation germination and seedling grow were examined. As response to UVB radiation, seeds and young emerging seedling from high irradiance habitat (PPF ± 2200 m molm-2s-1), sun variety plants show more tolerance than plants from habitat with less irradiance (PPF ± 1400 m molm-2s-1), shade variety plants. Germination and growing of sunny plants was faster than shady plants. Photosynthetic pigments (chlorophyll a and chlorophyll b) content increased in shady plants and was almost invariable for sunny plants. Total protein content decreased in both cases. Biosynthesis of flavonoids and epicuticular waxes was induced by UVB, especially in sun variety seedling. UVB screening total flavonoids were determined with UV spectroscopy. Epicuticular wax analysis was performed with FT IR technique. All this results suggest that an increment of UVB radiation is more harmful for plants accustomed to low radiation intensity, than for those growing at high light intensity.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaBoletín de la Sociedad Chilena de Química v.47 n.4 20022002-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000400022en10.4067/S0366-16442002000400022
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	UVB stress germination seedling growth pigments Sophora microphylla
spellingShingle	UVB stress germination seedling growth pigments Sophora microphylla Hess,Susan Alvarez,José Luis Iturra,Griselda Romero,Magdalena Evidence of UVB differential response in Sophora microphylla from shady and sunny places
description	The effect of the supplemental UVB radiation in forest species was studied in Sophora microphylla, a native tree that grow at low latitudes in the Central-South of Chile and important by their association with soil bacteria and mycorhizal fungi. Seeds of sun and shade variety growing at different light intensities were collected. Using indoor supplemental UVB radiation germination and seedling grow were examined. As response to UVB radiation, seeds and young emerging seedling from high irradiance habitat (PPF ± 2200 m molm-2s-1), sun variety plants show more tolerance than plants from habitat with less irradiance (PPF ± 1400 m molm-2s-1), shade variety plants. Germination and growing of sunny plants was faster than shady plants. Photosynthetic pigments (chlorophyll a and chlorophyll b) content increased in shady plants and was almost invariable for sunny plants. Total protein content decreased in both cases. Biosynthesis of flavonoids and epicuticular waxes was induced by UVB, especially in sun variety seedling. UVB screening total flavonoids were determined with UV spectroscopy. Epicuticular wax analysis was performed with FT IR technique. All this results suggest that an increment of UVB radiation is more harmful for plants accustomed to low radiation intensity, than for those growing at high light intensity.
author	Hess,Susan Alvarez,José Luis Iturra,Griselda Romero,Magdalena
author_facet	Hess,Susan Alvarez,José Luis Iturra,Griselda Romero,Magdalena
author_sort	Hess,Susan
title	Evidence of UVB differential response in Sophora microphylla from shady and sunny places
title_short	Evidence of UVB differential response in Sophora microphylla from shady and sunny places
title_full	Evidence of UVB differential response in Sophora microphylla from shady and sunny places
title_fullStr	Evidence of UVB differential response in Sophora microphylla from shady and sunny places
title_full_unstemmed	Evidence of UVB differential response in Sophora microphylla from shady and sunny places
title_sort	evidence of uvb differential response in sophora microphylla from shady and sunny places
publisher	Sociedad Chilena de Química
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000400022
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Evidence of UVB differential response in Sophora microphylla from shady and sunny places

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