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When everything changes at once
Whole-genome duplication (WGD), which leads to polyploidy, is implicated in adaptation and speciation. But what are the immediate effects of WGD and how do newly polyploid lineages adapt to them? With many studies of new and evolved polyploids now available, along with studies of genes under selection in polyploids, we are in an increasingly good position to understand how polyploidy generates novelty. Here, I will review consistent effects of WGD on the biology of plants, such as an increase in cell size, increased stress tolerance and more. I will discuss how a change in something as fundamental as cell size can challenge the function of some cell types in particular. I will also discuss what we have learned about the short- to medium-term evolutionary response to WGD. It is now clear that some of this evolutionary response may ‘lock in’ traits that happen to be beneficial, while in other cases, it might be more of an ‘emergency response’ to work around physiological changes that are either deleterious, or cannot be undone in the polyploid context. Yet, other traits may return rapidly to a diploid-like state. Polyploids may, by re-jigging many inter-related processes, find a new, conditionally adaptive, normal.
Journal Article
Reading Human Nature
As the founder and leading practitioner of \"literary Darwinism,\" Joseph Carroll remains at the forefront of a major movement in literary studies. Signaling key new developments in this approach, Reading Human Nature contains trenchant theoretical essays, innovative empirical research, sweeping surveys of intellectual history, and sophisticated interpretations of specific literary works, including The Picture of Dorian Gray, Wuthering Heights, The Mayor of Casterbridge, and Hamlet. Evolutionists in the social sciences have succeeded in delineating basic motives but have given far too little attention to the imagination. Carroll makes a compelling case that literary Darwinism is not just another \"school\" or movement in literary theory. It is the moving force in a fundamental paradigm change in the humanities—a revolution. Psychologists and anthropologists have provided massive evidence that human motives and emotions are rooted in human biology. Since motives and emotions enter into all the products of a human imagination, humanists now urgently need to assimilate a modern scientific understanding of \"human nature.\" Integrating evolutionary social science with literary humanism, Carroll offers a more complete and adequate understanding of human nature.
eBook
Charles and Emma : the Darwins' leap of faith
Provides an account of Charles Darwin's life and evolutionary theory, examining how his personal life affected his work and vice versa because of his wife's strong religious beliefs.
BOOK
Darwin review
Darwin’s dual interests in evolution and plants formed the basis of evolutionary botany, a field that developed following his publications on both topics. Here, we review his many contributions to plant biology—from the evolutionary origins of angiosperms to plant reproduction, carnivory, and movement—and note that he expected one day there would be a ‘true’ genealogical tree for plants. This view fuelled the field of plant phylogenetics. With perhaps nearly 400 000 species, the angiosperms have diversified rapidly since their origin in the Early Cretaceous, often through what appear to be rapid radiations. We describe these evolutionary patterns, evaluate possible drivers of radiations, consider how new approaches to studies of diversification can contribute to our understanding of angiosperm diversity, and suggest new directions for further insight into plant evolution.
Journal Article
