Efecto de la radiación ultravioleta-B sobre el crecimiento y la fotosíntesis de siete variedades de trigo (Triticum aestivum L.)

Pinto, Manuel; Lizana, X. Carolina; Pastenes, Claudio; Riquelme, Alejandro; Berti, Maritza

doi:10.4067/s0716-078x2000000100007

Cited by 5 publications

(2 citation statements)

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“…Differences in sensitivity between cultivars of the same species have been shown in diverse studies such as Kumagai et al (2001) who determined intraspecific differences between two rice (Oryza sativa L.) cultivars in the presence of an increase in UV-B radiation, presenting differences near 46% in the accumulation of dry matter. On the other hand, Pinto et al (2000) found differences in plant dry weight between wheat (Triticum aestivum L.) varieties.…”

Section: Introductionmentioning

confidence: 98%

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

et al. 2010

Chilean J. Agric. Res.

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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.

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Section: Introductionmentioning

confidence: 98%

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

et al. 2010

Chilean J. Agric. Res.

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“…Sin embargo, también es necesario remarcar que la sensibilidad de la quinoa a la radiación UV-B y solar en general, varía entre las variedades como fuera demostrado por Palenque et al (1997) y González et al (2009). La sensibilidad diferencial a la radiación UV-B de distintas variedades dentro de una misma especie también fue observada en trigo (Triticum aestivum) (Pinto et al, 2000), Avena fatua y Setaria viridis (Zuk-Golaszewska et al, 2003). Teniendo en cuenta que la quinoa comprende variedades adaptadas a diversos pisos altitudinales, nuestro grupo utilizó esta especie para estudiar el efecto de la radiación UV-B a nivel morfológico (Pérez, et al, 2015) y fisiológico.…”

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Efectos de la radiación ultravioleta B (UV-B) sobre diferentes variedades de Quinoa: II.- efectos sobre la síntesis de pigmentos fotosintéticos, protectores y azúcares solubles en condiciones controladas.

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Pérez

González

2016

Bol. Soc. Argent. Bot.

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Resumen: Se describen los efectos de la UV-B sobre la síntesis de pigmentos fotosintéticos (clorofila total, clorofila a, clorofila b, carotenoides), protectores (compuestos absorbentes de UV-B) y azúcares solubles (glucosa, fructosa y sacarosa) en cinco variedades de quinoa de diferentes orígenes geográficos. En general, se demuestra que las variedades reaccionan desplegando diferentes estrategias para protegerse de la radiación UV-B. Estas estrategias pueden ser de tipo morfológico, fisiológico y/o bioquímico. Una respuesta común, observada en las cinco variedades fue el incremento en el contenido de compuestos absorbentes de UV-B, lo que puede interpretarse como un "escudo químico" de protección para el aparato fotosintético frente al exceso de energía proveniente de la radiación que se aplica a las plantas.Palabras clave: Radiación UV-B, pigmentos fotosintéticos y protectores, azúcares solubles, adaptaciones, quinoa. Summary: Effects of B ultraviolet radiation (UV-B) on different varieties of Quinoa. II. Effects on thesynthesis of photosynthetic and protective pigments and soluble sugars under controlled conditions. The effects of UV-B radiation on photosynthetic (total chlorophyll, chlorophyll a, chlorophyll b and carotenoids) and protective (UV-B absorbing compounds) pigments, and soluble sugars (glucose, fructose and sucrose) in five quinoa varieties from different geographic origin are described. In general, it was demonstrated that varieties react by displaying different strategies to protect themselves against UV-B radiation. These strategies can be either morphological, physiological and/or biochemical type. A common response observed in the five varieties was the increase of UV-B absorbing compound content, which can be assumed as a protection, as a "chemical shield" to protect photosynthetic apparatus against the excess of energy that came from the radiation applied on plants.

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The Effects of Ultraviolet B Radiation on Crop Plants

Tobin

2002

Modern Trends in Applied Terrestrial Ecology

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Efecto de la radiación ultravioleta-B sobre el crecimiento y la fotosíntesis de siete variedades de trigo (Triticum aestivum L.)

Cited by 5 publications

References 0 publications

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

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

Efectos de la radiación ultravioleta B (UV-B) sobre diferentes variedades de Quinoa: II.- efectos sobre la síntesis de pigmentos fotosintéticos, protectores y azúcares solubles en condiciones controladas.

The Effects of Ultraviolet B Radiation on Crop Plants

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