Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation

The intensity of ultraviolet-B radiation (UV-B) has increased on the Earth’s surface due to the stratospheric ozone depletion, causing an adverse effect on a wide range of species, such as morphological, physiological, and biochemical alterations. This research studied the intraspecific ph...

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Autores principales:	Tapia F,María Luisa, Toro A,Guillermo , Parra R,Bélgica , Riquelme E,Alejandro
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2010
Materias:	UV radiation chlorophyll UV-B absorbing compounds chlorosis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100002
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spelling	oai:scielo:S0718-583920100001000022018-10-01Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B RadiationTapia F,María LuisaToro A,Guillermo Parra R,Bélgica Riquelme E,Alejandro UV radiation chlorophyll UV-B absorbing compounds chlorosis The intensity of ultraviolet-B radiation (UV-B) has increased on the Earth’s surface due to the stratospheric ozone depletion, causing an adverse effect on a wide range of species, such as morphological, physiological, and biochemical alterations. This research studied the intraspecific photosensitivity of cucumber (Cucumis sativus L.) seedlings exposed to UV-B. Six commercial cultivars were evaluated: Laura, Sprint 440, Dasher II, Exocet, Poinsett 76, and Marketmore 76 under greenhouse-controlled environmental conditions with a hydroponic sandwich-type system with a Hoagland II nutrient solution. Seedlings were irradiated from expanded cotyledons to the third true leaf with three intensities of UV-B radiation (30, 40, and 50 μW cm-2) for 18 d between 11:40-15:40 h. Seedling growth, morphology, accumulation of photosynthetic pigments, and absorbing UV-B pigments were evaluated. ’Laura’ was the least affected by chlorosis and had a total absence of leaf curl, whereas ’Poinsett 76’ was the most affected in the 40 and 50 μW cm-2 intensities. Both leaf area and seedling height of ’Marketmore 76’ and ’Poinsett 76’ had the lowest values. ’Laura’ obtained the highest value in both fresh weight and dry weight. ’Poinsett 76’ had the least amount of pigments absorbing UV-B and was 53% lower than that obtained by ’Laura’. ’Poinsett 76’ had lower chlorophyll and carotenoids. Parameters used were indicators of the seedling response to UV-B radiation, but could not be used for cucumber seedling sensitivity to UV-B radiation.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.70 n.1 20102010-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100002en10.4067/S0718-58392010000100002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	UV radiation chlorophyll UV-B absorbing compounds chlorosis
spellingShingle	UV radiation chlorophyll UV-B absorbing compounds chlorosis Tapia F,María Luisa Toro A,Guillermo Parra R,Bélgica Riquelme E,Alejandro Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation
description	The intensity of ultraviolet-B radiation (UV-B) has increased on the Earth’s surface due to the stratospheric ozone depletion, causing an adverse effect on a wide range of species, such as morphological, physiological, and biochemical alterations. This research studied the intraspecific photosensitivity of cucumber (Cucumis sativus L.) seedlings exposed to UV-B. Six commercial cultivars were evaluated: Laura, Sprint 440, Dasher II, Exocet, Poinsett 76, and Marketmore 76 under greenhouse-controlled environmental conditions with a hydroponic sandwich-type system with a Hoagland II nutrient solution. Seedlings were irradiated from expanded cotyledons to the third true leaf with three intensities of UV-B radiation (30, 40, and 50 μW cm-2) for 18 d between 11:40-15:40 h. Seedling growth, morphology, accumulation of photosynthetic pigments, and absorbing UV-B pigments were evaluated. ’Laura’ was the least affected by chlorosis and had a total absence of leaf curl, whereas ’Poinsett 76’ was the most affected in the 40 and 50 μW cm-2 intensities. Both leaf area and seedling height of ’Marketmore 76’ and ’Poinsett 76’ had the lowest values. ’Laura’ obtained the highest value in both fresh weight and dry weight. ’Poinsett 76’ had the least amount of pigments absorbing UV-B and was 53% lower than that obtained by ’Laura’. ’Poinsett 76’ had lower chlorophyll and carotenoids. Parameters used were indicators of the seedling response to UV-B radiation, but could not be used for cucumber seedling sensitivity to UV-B radiation.
author	Tapia F,María Luisa Toro A,Guillermo Parra R,Bélgica Riquelme E,Alejandro
author_facet	Tapia F,María Luisa Toro A,Guillermo Parra R,Bélgica Riquelme E,Alejandro
author_sort	Tapia F,María Luisa
title	Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation
title_short	Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation
title_full	Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation
title_fullStr	Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation
title_full_unstemmed	Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation
title_sort	photosensitivity of cucumber (cucumis sativus l.) seedlings exposed to ultraviolet-b radiation
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100002
work_keys_str_mv	AT tapiafmarialuisa photosensitivityofcucumbercucumissativuslseedlingsexposedtoultravioletbradiation AT toroaguillermo photosensitivityofcucumbercucumissativuslseedlingsexposedtoultravioletbradiation AT parrarbelgica photosensitivityofcucumbercucumissativuslseedlingsexposedtoultravioletbradiation AT riquelmeealejandro photosensitivityofcucumbercucumissativuslseedlingsexposedtoultravioletbradiation
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Photosensitivity of Cucumber (Cucumis sativus L.) Seedlings Exposed to Ultraviolet-B Radiation

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