Evolution of Complexity in the Volvocine Algae: Transitions in Individuality Through Darwin's Eye

Herron, Matthew D.; Michod, Richard E.

doi:10.1111/j.1558-5646.2007.00304.x

Cited by 165 publications

(278 citation statements)

References 61 publications

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“…Animals and plants have elaborated multicellularity into a plethora of diverse types. There are also a number of comparatively simple multicellular forms, like some single-species biofilms, the algal group Volvocales, or Dictyostelium (29,33). The transition to multicellularity is different from the transition to eukaryotes because the former involves an aggregate of like entities, whereas the latter binds different elements.…”

Section: Cooperation Organismality and Major Transitions In Evolutionmentioning

confidence: 99%

“…Another major transition resulted in multicellularity (29)(30)(31)(32). Multicellularity has evolved multiple times in both bacterial and eukaryote lineages.…”

Section: Cooperation Organismality and Major Transitions In Evolutionmentioning

confidence: 99%

“…This choice is supported by the enormous progress in understanding social evolution that has been made with this organism in the past decade. In addition to D. discoideum, Volvox and its relatives are great for studying the origins of multicellularity in a clonal organism (29). Myxococcus xanthus offers all the advantages of a bacterial system (37).…”

Section: Laboratory-friendly Social Model Organismmentioning

confidence: 99%

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Evolution of cooperation and control of cheating in a social microbe

Strassmann

Queller

2011

Proc. Natl. Acad. Sci. U.S.A.

194

200

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Much of what we know about the evolution of altruism comes from animals. Here, we show that studying a microbe has yielded unique insights, particularly in understanding how social cheaters are controlled. The social stage of Dictylostelium discoideum occurs when the amoebae run out of their bacterial prey and aggregate into a multicellular, motile slug. This slug forms a fruiting body in which about a fifth of cells die to form a stalk that supports the remaining cells as they form hardy dispersal-ready spores. Because this social stage forms from aggregation, it is analogous to a social group, or a chimeric multicellular organism, and is vulnerable to internal conflict. Advances in cell labeling, microscopy, single-gene knockouts, and genomics, as well as the results of decades of study of D. discoideum as a model for development, allow us to explore the genetic basis of social contests and control of cheaters in unprecedented detail. Cheaters are limited from exploiting other clones by high relatedness, kin discrimination, pleiotropy, noble resistance, and lottery-like role assignment. The active nature of these limits is reflected in the elevated rates of change in social genes compared with nonsocial genes. Despite control of cheaters, some conflict is still expressed in chimeras, with slower movement of slugs, slightly decreased investment in stalk compared with spore cells, and differential contributions to stalk and spores. D. discoideum is rapidly becoming a model system of choice for molecular studies of social evolution.kin selection | kin recognition | multicellularity | major transitions

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Section: Cooperation Organismality and Major Transitions In Evolutionmentioning

confidence: 99%

“…Another major transition resulted in multicellularity (29)(30)(31)(32). Multicellularity has evolved multiple times in both bacterial and eukaryote lineages.…”

Section: Cooperation Organismality and Major Transitions In Evolutionmentioning

confidence: 99%

Section: Laboratory-friendly Social Model Organismmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of cooperation and control of cheating in a social microbe

Strassmann

Queller

2011

Proc. Natl. Acad. Sci. U.S.A.

194

200

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“…In Volvocalean green algae, multicellular organisms are formed clonally from a single cell [33]. Here, we mainly focus on one member of this lineage named V. carteri which exhibits a range of development in different cell types [32].…”

Section: A New Approach For Groupingmentioning

confidence: 99%

“…Following this approach which is called changes in the level of complexity [32], we describe a novel approach for grouping in SSA.…”

Section: A New Approach For Groupingmentioning

confidence: 99%

From nature to maths: Improving forecasting performance in subspace-based methods using genetics Colonial Theory

Hassani

Ghodsi

Silva

et al. 2016

Digital Signal Processing

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Many scientific fields consider accurate and reliable forecasting methods as important decision-making tools in the modern age amidst increasing volatility and uncertainty. As such there exists an opportune demand for theoretical developments which can result in more accurate forecasts. Inspired by Colonial Theory, this paper seeks to bring about considerable improvements to the field of time series analysis and forecasting by identifying certain core characteristics of Colonial Theory which are subsequently exploited in introducing a novel approach for the grouping step of subspace based methods. The proposed algorithm shows promising results in terms of improved performances in noise filtering and forecasting of time series. The reliability and validity of the proposed algorithm is evaluated and compared with popular forecasting models with the results being thoroughly evaluated for statistical significance and thereby adding more confidence and value to the findings of this research.

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Evolution of Multicellularity

Nedelcu

2012

Encyclopedia of Life Sciences

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Multicellularity has evolved multiple times, independently, in lineages from all three domains of life. The transition from a unicellular to a multicellular life‐style entails the integration of previously independent individuals into a new kind of individual. The emergence of individuality at the higher level requires the evolution of cooperative and altruistic behaviours, division of labour (including the separation of reproductive and somatic activities among cells), the reorganisation of basic life properties (such as immortality and totipotency), and the reorganisation of fitness (with cells specialising in one or the other fitness components – survival or reproduction). At a more mechanistic level, a new genotype–phenotype map has to be created to reflect the emergence of a new kind of individual. Notably, many traits associated with multicellularity appear to have involved the co‐option of genes and pathways already present in unicellular lineages. The evolution of multicellularity has been driven by a combination of selective pressures, developmental constraints and life history trade‐offs specific to each lineage. Key Concepts: The transition from a unicellular to a multicellular life‐style constitutes a transition in individuality, a process whereby a group of previously independent individuals become stably integrated into a new functional, physiological and reproductively autonomous and indivisible evolutionary unit – that is, a new individual. The successful integration of previously independent individuals into a new kind of individual requires the evolution of cooperative and altruistic behaviours, division of labour, the reorganisation of basic life properties, and the reorganisation of fitness. Multicellularity has evolved independently in at least 25 lineages from all three domains of life. The evolution of multicellularity has been driven by a combination of selective pressures, developmental constraints and life history trade‐offs specific to each lineage. Many traits associated with multicellularity involved the co‐option of genes and pathways already present in unicellular lineages.

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Evolution of Complexity in the Volvocine Algae: Transitions in Individuality Through Darwin's Eye

Abstract: A second cycle, in which the defection of somatic cells must be prevented, may still be in progress.

Cited by 165 publications

References 61 publications

Evolution of cooperation and control of cheating in a social microbe

Evolution of cooperation and control of cheating in a social microbe

From nature to maths: Improving forecasting performance in subspace-based methods using genetics Colonial Theory

Evolution of Multicellularity

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