Evolutionary plant physiology: Charles Darwin's forgotten synthesis
Ulrich Kutschera1, Karl J Niklas
1Institute of Biology, University of Kassel, Heinrich-Plett-Str. 40, 34109, Kassel, Germany. kut@uni-kassel.de
Die Naturwissenschaften
|September 19, 2009
Summary
Charles Darwin
Area of Science:
- Plant Physiology
- Evolutionary Biology
- Botany
Background:
- Charles Darwin extensively studied higher plants (angiosperms) for over two decades.
- His research encompassed descriptive botany and experimental plant physiology.
- Contrary to assumption, his interests were both physiological and evolutionary.
Discussion:
- Modern perspective on Darwin's plant physiology research.
- Exploration of topics: circumnutations, tropisms, auxin action, root-brain hypothesis, photosynthesis, endosymbioses, photomorphogenesis, and metabolic rates.
- Analysis of developmental constraints and functional equivalence in natural selection.
Key Insights:
- Darwin's work reveals a cohesive evolutionary approach to plant physiology.
- Identified evolutionary patterns in plant hormone action (auxin).
- Investigated plant responses to environmental stimuli and metabolic strategies.
Outlook:
- Defines Darwinian (evolutionary) plant physiology as a new discipline.
- Emphasizes experimental study and theoretical analysis of plant functions from a phylogenetic viewpoint.
- Highlights the integration of evolutionary principles into understanding plant life.
Related Concept Videos
Non-vascular Seedless Plants
The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
Introduction to Plant Diversity
From Water to Land
C4 Pathway and CAM
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
Tonicity in Plants
Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Tonicity in Plants
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.Plants and Hypotonic EnvironmentsUnlike animal cells,...
Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.


