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Fundamental links between genes and elements: evolutionary implications of ecological stoichiometry
Punidan D Jeyasingh1, Lawrence J Weider
1Program in Ecology and Evolutionary Biology, Biological Station and Department of Zoology, University of Oklahoma, Norman, OK 73019, USA. jeyas001@umn.edu
Molecular Ecology
|October 20, 2007
Summary
Organisms need elements like phosphorus (P) to survive, but P availability and demand vary. This study reveals how genetic variations in P homeostasis impact organismal fitness and evolution.
Area of Science:
- * Biogeochemistry and Molecular Ecology
- * Environmental Biology and Evolutionary Genetics
Background:
- * Organisms require essential elements for life, with significant spatiotemporal variability in the availability of key nutrients like phosphorus (P).
- * Ontogenetic and phylogenetic variations in elemental demand further complicate nutrient acquisition and utilization.
- * The genetic underpinnings of these elemental homeostasis mechanisms, particularly for phosphorus, remain incompletely understood.
Purpose of the Study:
- * To conduct a literature survey identifying genes involved in phosphorus (P) homeostasis across diverse organisms.
- * To explore the relationship between environmental P supply, gene expression, and genetic variation in P acquisition, assimilation, and allocation.
- * To assess the implications of P availability and genetic variation for organismal fitness and evolutionary diversification.
Main Methods:
- * Systematic literature review and meta-analysis of existing research on phosphorus (P) homeostasis genes.
- * Analysis of gene expression patterns in response to varying environmental P levels.
- * Examination of genetic variation related to P acquisition, assimilation, and allocation pathways.
Main Results:
- * Environmental phosphorus (P) supply significantly affects the expression of conserved genes, including the phosphate transporter system.
- * Evidence indicates substantial genetic variation in the mechanisms organisms employ to acquire, assimilate, and allocate phosphorus (P).
- * Imbalances in phosphorus (P) availability, relative to other elements, likely influence inter- and intraspecific fitness.
Conclusions:
- * Studying the genetic basis of elemental homeostasis, particularly phosphorus (P), is crucial for understanding organismal adaptation and evolution.
- * Interactions between stoichiometric constraints and genetic variation are fundamental to a wide range of organisms.
- * This research provides a framework for designing and interpreting experiments investigating elemental homeostasis and its evolutionary consequences.
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