Publications by authors named "Jules Segrestin"

Article Synopsis
  • The Metabolic Scaling Theory (MST) explores how resource-transport networks in organisms can lead to optimizations in their structure, predicting a universal scaling relationship between body size and growth rate across species.
  • Challenges to this theory arise when examining the transition from unicellular to multicellular organisms, particularly in terms of how growth rates are influenced by nutrient uptake and distribution.
  • Our research on the unicellular algae Micrasterias, which exhibits a unique size and shape, confirmed that its growth rates align with MST predictions, suggesting that fractal-like structures are crucial for maintaining biological scaling even as organisms become larger.
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A recent analysis of variation in six major traits conducted on a large worldwide sample of vascular plant species showed that three-quarters of trait variation was captured by a two-dimensional global spectrum of plant form and function ("global spectrum" hereafter). We developed the PhenoSpace application, whose aim is to visualize and export the position of any individual/population/species in the phenotypic space of the global spectrum.PhenoSpace is a Shiny application that helps users to manipulate and visualize data pertaining to the global spectrum of plant form and function.

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Phenology, the study of seasonal timing of events in nature, plays a key role in the matching between organisms and their environment. Yet, it has been poorly integrated in trait-based descriptions of the plant phenotype. Here, we focus on three phases of reproductive phenology - time of flowering, time of seed dispersal and duration of seed maturation - to test how these traits relate to other recognized dimensions of plant functioning.

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Background And Aims: The CSR classification categorizes plants as stress tolerators (S), ruderals (R) and competitors (C). Initially proposed as a general framework to describe ecological strategies across species, this scheme has recently been used to investigate the variation of strategies within species. For instance, ample variation along the S-R axis was found in Arabidopsis thaliana, with stress-tolerator accessions predominating in hot and dry regions, which was interpreted as a sign of functional adaptation to climate within the species.

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