University of Warwick

About: University of Warwick is a education organization based out in Coventry, Warwickshire, United Kingdom. It is known for research contribution in the topics: Population & White dwarf. The organization has 26212 authors who have published 77127 publications receiving 2666552 citations. The organization is also known as: Warwick University & The University of Warwick.

Gene expression profiles of Arabidopsis Cvi seeds during dormancy cycling indicate a common underlying dormancy control mechanism

Abstract: Physiologically dormant seeds, like those of Arabidopsis, will cycle through dormant states as seasons change until the environment is favourable for seedling establishment. This phenomenon is widespread in the plant kingdom, but has not been studied at the molecular level. Full-genome microarrays were used for a global transcript analysis of Arabidopsis thaliana (accession Cvi) seeds in a range of dormant and dry after-ripened states during cycling. Principal component analysis of the expression patterns observed showed that they differed in newly imbibed primary dormant seeds, as commonly used in experimental studies, compared with those in the maintained primary and secondary dormant states that exist during cycling. Dormant and after-ripened seeds appear to have equally active although distinct gene expression programmes, dormant seeds having greatly reduced gene expression associated with protein synthesis, potentially controlling the completion of germination. A core set of 442 genes were identified that had higher expression in all dormant states compared with after-ripened states. Abscisic acid (ABA) responsive elements were significantly over-represented in this set of genes the expression of which was enhanced when multiple copies of the elements were present. ABA regulation of dormancy was further supported by expression patterns of key genes in ABA synthesis/catabolism, and dormancy loss in the presence of fluridone. The data support an ABA-gibberelic acid hormone balance mechanism controlling cycling through dormant states that depends on synthetic and catabolic pathways of both hormones. Many of the most highly expressed genes in dormant states were stress-related even in the absence of abiotic stress, indicating that ABA, stress and dormancy responses overlap significantly at the transcriptome level.

Marine ecosystems: Bacterial photosynthesis genes in a virus

Abstract: A bacteriophage may protect itself and its host against a deadly effect of bright sunlight.

The Relqual Scale: A Measure of Relationship Quality in Export Market Ventures

Abstract: In this article the authors develop a new measurement scale (the RELQUAL scale) to assess the degree of relationship quality between the exporting firm and the importer. Relationship quality is presented as a high order concept. Findings reveal that a better quality of the relationship results in a greater 1) amount of information sharing, 2) communication quality, 3) long-term orientation, as well as 4) satisfaction with the relationship. The four multi-item scales show strong evidence of reliability as well as convergent, discriminant and nomological validity in a sample of British exporters. Findings also reveal that relationship quality is positively and significantly associated with export performance. Suggestions for applying the measure in future research are presented.

Westward ho—the China dream and ‘one belt, one road’: Chinese foreign policy under Xi Jinping

Abstract: China's domestic politics and foreign policy have evolved considerably under President Xi Jinping. Domestically the regime has actively promoted the idea of the ‘China dream’ to restore optimism and enthusiasm about its future, particularly among young people. Yet it has also sought to differentiate the socialist China dream from any resemblance to the American dream. Its main emphasis is on making China ‘strong and powerful’ again. In foreign policy, the leadership has become more active. While China has pursued a more robust policy in the South China Sea, it has also launched two extremely ambitious long-term projects to expand land and maritime transport links between China and Europe, termed the ‘one belt, one road’ initiative. They aim to promote development of western China, but if successful, they should also help to transform economic relations across large parts of Eurasia. In geopolitical terms, they will expand China's shadow over regions of the world where hitherto its presence has been relatively modest. They should strengthen links with Europe, as well as with other countries along the routes, to counterbalance potentially conflictual relations with the US. However, success will require active and enthusiastic cooperation from many neighbours. For that reason the risks are as great as the ambition.