Photosynthetic Pigments And Uv B Radiation
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Efeitos da radiação UV-B em variantes cromáticas de Gracilaria birdiae (Gracilariales, Rhodophyta): crescimento, conteúdo pigmentar, fotossíntese e ultra-estrutura / Effects of UV-B radiation on different strains of Gracilaria birdiae(Gracilariales, Rhodophyta): growth, pigment content, photosynthesis and ultrastructure
O objetivo desse trabalho foi avaliar os efeitos da radiação UV-B em indivíduos de linhagens de cultivados em laboratório. Foram utilizadas linhagens de gametófitos femininos de coloração vermelha (VMsubES/sub e VMSUBCE/SUB), verde (VD subCE/sub) e marrom-esverdeada (ME subCE/sub), derivados de populações dos Estados do Espírito Santo e Ceará. Doi
Publicado em: 2009
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2. The Role of Flavonol Glycosides and Carotenoids in Protecting Soybean from Ultraviolet-B Damage.
The increase in ultraviolet-B (UV-B; 0.290-0.320 [mu]m) radiation received by plants due to stratospheric ozone depletion heightens the importance of understanding UV-B tolerance. Photosynthetic tissue is believed to be protected from UV-B radiation by UV-B-absorbing compounds (e.g. flavonoids). Although synthesis of flavonoids is induced by UV-B radiation,
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3. Photosynthesis, Growth, and Ultraviolet Irradiance Absorbance of Cucurbita pepo L. Leaves Exposed to Ultraviolet-B Radiation (280-315 nm) 1
Net photosynthesis, growth, and ultraviolet (UV) radiation absorbance were determined for the first leaf of Cucurbita pepo L. exposed to two levels of UV-B irradiation and a UV-B radiation-free control treatment. Absorbance by extracted flavonoid pigments and other UV-B radiation-absorbing compounds from the first leaves increased with time and level of UV-B
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4. Effect of Solar Ultraviolet-B Radiation during Springtime Ozone Depletion on Photosynthesis and Biomass Production of Antarctic Vascular Plants1
We assessed the influence of springtime solar UV-B radiation that was naturally enhanced during several days due to ozone depletion on biomass production and photosynthesis of vascular plants along the Antarctic Peninsula. Naturally growing plants of Colobanthus quitensis (Kunth) Bartl. and Deschampsia antarctica Desv. were potted and grown under filter
American Society of Plant Physiologists.
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5. Ultraviolet-B Radiation Impacts Light-Mediated Turnover of the Photosystem II Reaction Center Heterodimer in Arabidopsis Mutants Altered in Phenolic Metabolism
Ultraviolet-B (UV-B) radiation can have a negative impact on the growth and development of plants. Plants tolerant to UV-B alleviate these effects using UV-screening pigments that reduce the penetration of UV-B into mesophyll tissue. Little is known about the relative contribution of specific phenolic compounds to the screening capacity of leaves. The D1 and
American Society of Plant Physiologists.