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316 Aktuelle Fachpublikationen von Proceedings of the National Academy of Sciences

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Cognitive emotion regulation fails the stress test [Psychological and Cognitive Sciences]

10.09.2013 | Candace M. Raio; Temidayo A. Orederu; Laura Palazzolo; Ashley A. Shurick; Elizabeth A. Phelps, Proceedings of the National Academy of Sciences current issue, 2013

Cognitive emotion regulation has been widely shown in the laboratory to be an effective way to alter the nature of emotional responses. Despite its success in experimental contexts, however, we often fail to use these strategies in everyday life where stress is pervasive. The successful execution ...

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Transcriptional response to stress in the dynamic chromatin environment of cycling and mitotic cells [Cell Biology]

03.09.2013 | Anniina Vihervaara; Christian Sergelius; Jenni Vasara; Malin A. H. Blom; Alexandra N. Elsing; Pia Roos-Mattjus; Lea ..., Proceedings of the National Academy of Sciences current issue, 2013

Heat shock factors (HSFs) are the master regulators of transcription under protein-damaging conditions, acting in an environment where the overall transcription is silenced. We determined the genomewide transcriptional program that is rapidly provoked by HSF1 and HSF2 under acute stress in human ...

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Salicylic acid 3-hydroxylase regulates Arabidopsis leaf longevity by mediating salicylic acid catabolism [Plant Biology]

03.09.2013 | Kewei Zhang; Rayko Halitschke; Changxi Yin; Chang-Jun Liu; Su-Sheng Gan, Proceedings of the National Academy of Sciences current issue, 2013

The plant hormone salicylic acid (SA) plays critical roles in plant defense, stress responses, and senescence. Although SA biosynthesis is well understood, the pathways by which SA is catabolized remain elusive. Here we report the identification and characterization of an SA 3-hydroxylase (S3H) ...

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Subset of heat-shock transcription factors required for the early response of Arabidopsis to excess light [Plant Biology]

27.08.2013 | Hou-Sung Jung; Peter A. Crisp; Gonzalo M. Estavillo; Benjamin Cole; Fangxin Hong; Todd C. Mockler; Barry J. Pogson; ..., Proceedings of the National Academy of Sciences current issue, 2013

Sunlight provides energy for photosynthesis and is essential for nearly all life on earth. However, too much or too little light or rapidly fluctuating light conditions cause stress to plants. Rapid changes in the amount of light are perceived as a change in the reduced/oxidized (redox) state of ...

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Host-related metabolic cues affect colonization strategies of a root endophyte [Microbiology]

20.08.2013 | Urs Lahrmann; Yi Ding; Aline Banhara; Magnus Rath; Mohammad R. Hajirezaei; Stefanie Döhlemann; Nicolaus von Wirén; M ..., Proceedings of the National Academy of Sciences current issue, 2013

The mechanisms underpinning broad compatibility in root symbiosis are largely unexplored. The generalist root endophyte Piriformospora indica establishes long-lasting interactions with morphologically and biochemically different hosts, stimulating their growth, alleviating salt stress, and ...

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Brief meditation training induces smoking reduction [Psychological and Cognitive Sciences]

20.08.2013 | Yi-Yuan Tang; Rongxiang Tang; Michael I. Posner, Proceedings of the National Academy of Sciences current issue, 2013

More than 5 million deaths a year are attributable to tobacco smoking, but attempts to help people either quit or reduce their smoking often fail, perhaps in part because the intention to quit activates brain networks related to craving. We recruited participants interested in general stress ...

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Reducing deformation anisotropy to achieve ultrahigh strength and ductility in Mg at the nanoscale [Engineering]

13.08.2013 | Qian Yu; Liang Qi; Raja K. Mishra; Ju Li; Andrew M. Minor, Proceedings of the National Academy of Sciences current issue, 2013

In mechanical deformation of crystalline materials, the critical resolved shear stress (CRSS; τCRSS) is the stress required to initiate movement of dislocations on a specific plane. In plastically anisotropic materials, such as Mg, τCRSS for different slip systems differs greatly, leading to ...

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SIRT2 directs the replication stress response through CDK9 deacetylation [Medical Sciences]

13.08.2013 | Hui Zhang; Seong-Hoon Park; Brooke G. Pantazides; Oleksandra Karpiuk; Matthew D. Warren; Claire W. Hardy; Duc M. Duo ..., Proceedings of the National Academy of Sciences current issue, 2013

Sirtuin 2 (SIRT2) is a sirtuin family deacetylase that directs acetylome signaling, protects genome integrity, and is a murine tumor suppressor. We show that SIRT2 directs replication stress responses by regulating the activity of cyclin-dependent kinase 9 (CDK9), a protein required for recovery ...

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Reply to van Leeuwen et al.: Planning for agricultural adaptation to climate change and its consequences for conservation [Biological Sciences]

13.08.2013 | Lee Hannah; Patrick R. Roehrdanz; Makihiko Ikegami; Anderson V. Shepard; M. Rebecca Shaw; Gary Tabor; Lu Zhi; Pablo ..., Proceedings of the National Academy of Sciences current issue, 2013

Viticulture will not cease in major wine-growing regions in response to climate change, because vineyard managers will not let that happen. Adaptation measures will be taken to permit continued cultivation of wine grapes. These adaptation measures can place major stress on water resources and ...

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Universal collapse of stress and wrinkle-to-scar transition in spherically confined crystalline sheets [Applied Physical Sciences]

06.08.2013 | Gregory M. Grason; Benny Davidovitch, Proceedings of the National Academy of Sciences current issue, 2013

Imposing curvature on crystalline sheets, such as 2D packings of colloids or proteins, or covalently bonded graphene leads to distinct types of structural instabilities. The first type involves the proliferation of localized defects that disrupt the crystalline order without affecting the imposed ...

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