نتایج جستجو برای: uv b stress

تعداد نتایج: 1372630  

2012
Krisztina Szegedi Anikó Göblös Sarolta Bacsa Mária Antal István Balázs Németh Zsuzsanna Bata-Csörgő Lajos Kemény Attila Dobozy Márta Széll

PRINS, a noncoding RNA identified earlier by our research group, contributes to psoriasis susceptibility and cellular stress response. We have now studied the cellular and histological distribution of PRINS by using in situ hybridization and demonstrated variable expressions in different human tissues and a consistent staining pattern in epidermal keratinocytes and in vitro cultured keratinocyt...

Journal: :Plant physiology 2004
Takahiro Fujibe Hikaru Saji Keita Arakawa Naoto Yabe Yuichi Takeuchi Kotaro T Yamamoto

To better understand the role of active oxygen species (AOS) in acquired resistance to increased levels of ultraviolet (UV)-B irradiation in plants, we isolated an Arabidopsis mutant that is resistant to methyl viologen, and its sensitivity to UV-B was investigated. A complementation test revealed that the obtained mutant was allelic to the ozone-sensitive radical-induced cell death1-1 (rcd1-1)...

Journal: :Molecular Vision 2008
Ke Yao Li Zhang YiDong Zhang PanPan Ye Ning Zhu

PURPOSE Ultraviolet (UV) radiation-induced oxidative stress plays a significant role in the progression of cataracts. This study investigated the photoprotective effect of fisetin on UV radiation-induced oxidative stress in human lens epithelial cells and the possible molecular mechanism involved. METHODS SRA01/04 cells exposed to different doses of ultraviolet B (UVB) were cultured with vari...

2016
María B. Fernández Vanesa Tossi Lorenzo Lamattina Raúl Cassia

Ultraviolet-B (UV-B) is present in sunlight (280-315 nm) and has diverse effects on living organisms. Low fluence rate of exposure induces a specific photomorphogenic response regulated by the UV-B response locus 8 (UVR8) receptor. UVR8 was first described in Arabidopsis thaliana. In the absence of stimuli it is located in the cytoplasm as a homodimer. However, upon UV-B irradiation, it switche...

Journal: :The Plant cell 2016
Jennifer Mach

The sun gives light, but it’s a package deal: Sunlight contains “good” wavelengths that plants can use for photosynthesis, but it also contains “bad” wavelengths that can damage cells. For example, the ozone layer absorbs most UV-B (wavelengths 280 to 315 nm) from sunlight; the remaining UV-B makes up less than 0.5% of the total light energy but can damage DNA and the photosynthetic apparatus. ...

Journal: :The Journal of biological chemistry 2016
Zeng-Qiang Yuan Richard I Feldman Mei Sun Nancy E Olashaw Domenico Coppola Gene E Sussman Sue A Shelley Santo V Nicosia Jin Q Cheng

Previous studies have demonstrated that AKT1 and AKT3 are activated by heat shock and oxidative stress via both phosphatidylinositol 3-kinase-dependent and -independent pathways. However, the activation and role of AKT2 in the stress response have not been fully elucidated. In this study, we show that AKT2 in epithelial cells is activated by UV-C irradiation, heat shock, and hyperosmolarity as ...

2014
Ralf Müller-Xing Qian Xing Justin Goodrich

Sunlight provides the necessary energy for plant growth via photosynthesis but high light and particular its integral ultraviolet (UV) part causes stress potentially leading to serious damage to DNA, proteins, and other cellular components. Plants show adaptation to environmental stresses, sometimes referred to as "plant memory." There is growing evidence that plants memorize exposure to biotic...

Journal: :Toxicology in vitro : an international journal published in association with BIBRA 2009
Soo-Jin Heo Seok-Chun Ko Seon-Heui Cha Do-Hyung Kang Heung-Sik Park Young-Ung Choi Daekyung Kim Won-Kyo Jung You-Jin Jeon

In the present study, three kinds of phlorotannins, marine algal polyphenol, were isolated from a brown alga Ecklonia cava, and their inhibitory effect on melanogenesis as well as the protective effect against photo-oxidative stress induced by UV-B radiation was investigated. The effect on melanogenesis was evaluated via the inhibitory effects of tyrosinase and melanin synthesis. Among the phlo...

Journal: :Nutricion hospitalaria 2014
Lluvia de Abril Alexandra Soriano-Melgar Lilia Alcaraz-Meléndez Lía C Méndez-Rodríguez María Esther Puente Fernando Rivera-Cabrera Tania Zenteno-Savín

INTRODUCTION Ultraviolet type C (UV-C) radiation has higher energy than the UV-B radiation and has been less studied because it is completely absorbed by the ozone layer. However, artificial UV-C radiation can generate diverse modifications in the plants. Given that exposure to UV-C for short periods of time increases the antioxidant content, improving the appearance and shelf-life of products,...

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