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Plant Hormone Modularity and the Survival-Reproduction Trade-Off
Jasmina Kurepa1, Jan A Smalle1
1Plant Physiology, Biochemistry, Molecular Biology Program, Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, USA.
Biology
|August 26, 2023
Summary
Biological modularity organizes life into functional units. This review shows plant hormones, like cytokinin, balance survival and reproduction needs through distinct signaling pathways.
Area of Science:
- Evolutionary Biology
- Plant Physiology
- Systems Biology
Background:
- Biological modularity describes how organisms are organized into functional units, crucial for adaptation and evolution.
- Conflicting demands, particularly the survival-reproduction trade-off, are key drivers for the evolution of biological modularity.
- Plant hormones play critical roles in mediating these trade-offs, influencing both individual survival and species propagation.
Purpose of the Study:
- To review evidence on plant hormone modularity in relation to the survival-reproduction trade-off.
- To elucidate the distinct roles and signaling mechanisms of plant hormone modules in balancing survival and reproduction.
Main Methods:
- Literature review synthesizing existing research on plant hormone function and signaling.
- Analysis of signaling pathway structures to infer functional roles in the survival-reproduction trade-off.
Main Results:
- The cytokinin hormone module is primarily dedicated to maximizing reproductive output.
- Other plant hormone modules are structured to ensure reproduction while preventing excessive resource allocation to survival.
- Distinct signaling mechanisms, including sequential activation for cytokinin and double-negative feedback for others, support these roles.
Conclusions:
- Plant hormone systems exhibit modular organization, reflecting their specialized roles in managing the survival-reproduction trade-off.
- Cytokinin signaling prioritizes reproduction, while other hormone pathways act as checks to balance resource allocation between survival and reproduction.
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