My watch list
my.chemeurope.com  
Login  

788 Newest Publications in proceedings of the national academy of sciences current issue

rss
matching the following criteria

Erosion of functional independence early in the evolution of a microbial mutualism [Evolution]

14-10-2014 | Kristina L. Hillesland; Sujung Lim; Jason J. Flowers; Serdar Turkarslan; Nicolas Pinel; Grant M. Zane; Nicholas Elli ..., Proceedings of the National Academy of Sciences current issue, 2014

Many species have evolved to function as specialized mutualists, often to the detriment of their ability to survive independently. However, there are few, if any, well-controlled observations of the evolutionary processes underlying the genesis of new mutualisms. Here, we show that within the ...

more

A mechanistic framework for noncell autonomous stem cell induction in Arabidopsis [Plant Biology]

07-10-2014 | Gabor Daum; Anna Medzihradszky; Takuya Suzaki; Jan U. Lohmann, Proceedings of the National Academy of Sciences current issue, 2014

Cell–cell communication is essential for multicellular development and, consequently, evolution has brought about an array of distinct mechanisms serving this purpose. Consistently, induction and maintenance of stem cell fate by noncell autonomous signals is a feature shared by many organisms and ...

more

Structural adaptations to diverse fighting styles in sexually selected weapons [Evolution]

07-10-2014 | Erin L. McCullough; Bret W. Tobalske; Douglas J. Emlen, Proceedings of the National Academy of Sciences current issue, 2014

The shapes of sexually selected weapons differ widely among species, but the drivers of this diversity remain poorly understood. Existing explanations suggest weapon shapes reflect structural adaptations to different fighting styles, yet explicit tests of this hypothesis are lacking. We ...

more

Alternating antibiotic treatments constrain evolutionary paths to multidrug resistance [Evolution]

07-10-2014 | Seungsoo Kim; Tami D. Lieberman; Roy Kishony, Proceedings of the National Academy of Sciences current issue, 2014

Alternating antibiotic therapy, in which pairs of drugs are cycled during treatment, has been suggested as a means to inhibit the evolution of de novo resistance while avoiding the toxicity associated with more traditional combination therapy. However, it remains unclear under which conditions ...

more

Conifer species adapt to low-rainfall climates by following one of two divergent pathways [Evolution]

07-10-2014 | Timothy J. Brodribb; Scott A.M. McAdam; Gregory J. Jordan; Samuel C.V. Martins, Proceedings of the National Academy of Sciences current issue, 2014

Water stress is one of the primary selective forces in plant evolution. There are characters often cited as adaptations to water stress, but links between the function of these traits and adaptation to drying climates are tenuous. Here we combine distributional, climatic, and physiological ...

more

A rock engraving made by Neanderthals in Gibraltar [Anthropology]

16-09-2014 | Joaquín Rodríguez-Vidal; Francesco d’Errico; Francisco Giles Pacheco; Ruth Blasco; Jordi Rosell; Richard P. Jennings ..., Proceedings of the National Academy of Sciences current issue, 2014

The production of purposely made painted or engraved designs on cave walls—a means of recording and transmitting symbolic codes in a durable manner—is recognized as a major cognitive step in human evolution. Considered exclusive to modern humans, this behavior has been used to argue in favor of ...

more

Reprogramming the specificity of sortase enzymes [Biochemistry]

16-09-2014 | Brent M. Dorr; Hyun Ok Ham; Chihui An; Elliot L. Chaikof; David R. Liu, Proceedings of the National Academy of Sciences current issue, 2014

Staphylococcus aureus sortase A catalyzes the transpeptidation of an LPXTG peptide acceptor and a glycine-linked peptide donor and has proven to be a powerful tool for site-specific protein modification. The substrate specificity of sortase A is stringent, limiting its broader utility. Here we ...

more

Transcriptome profiling reveals mosaic genomic origins of modern cultivated barley [Evolution]

16-09-2014 | Fei Dai; Zhong-Hua Chen; Xiaolei Wang; Zefeng Li; Gulei Jin; Dezhi Wu; Shengguan Cai; Ning Wang; Feibo Wu; Eviatar N ..., Proceedings of the National Academy of Sciences current issue, 2014

The domestication of cultivated barley has been used as a model system for studying the origins and early spread of agrarian culture. Our previous results indicated that the Tibetan Plateau and its vicinity is one of the centers of domestication of cultivated barley. Here we reveal multiple ...

more

New high-resolution computed tomography data of the Taung partial cranium and endocast and their bearing on metopism and hominin brain evolution [Anthropology]

09-09-2014 | Ralph L. Holloway; Douglas C. Broadfield; Kristian J. Carlson, Proceedings of the National Academy of Sciences current issue, 2014

Falk and colleagues [Falk D, Zollikofer CP, Morimoto N, Ponce de León MS (2012) Proc Natl Acad Sci U S A 109(22):8467–8470] hypothesized that selective pressures favored late persistence of a metopic suture and open anterior fontanelle early in hominin evolution, and they put an emphasis on the ...

more

Fractal branching organizations of Ediacaran rangeomorph fronds reveal a lost Proterozoic body plan [Evolution]

09-09-2014 | Jennifer F. Hoyal Cuthill; Simon Conway Morris, Proceedings of the National Academy of Sciences current issue, 2014

The branching morphology of Ediacaran rangeomorph fronds has no exact counterpart in other complex macroorganisms. As such, these fossils pose major questions as to growth patterns, functional morphology, modes of feeding, and adaptive optimality. Here, using parametric Lindenmayer systems, a ...

more

Page 1 From 79
Subscribe to e-mail updates relating to your search

You will receive via e-mail the latest search results matching your search criteria. This service is free of charge and can be cancelled at any time.

Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE