Molecular-level carbon traits underlie the multidimensional fine root economics space
Mengke Wang1,2, Deliang Kong3, Xiaohan Mo4
1State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China.
Nature Plants
|May 13, 2024
Summary
Plant roots exhibit diverse carbon economics, varying with molecular traits. Thinner roots use more carbohydrates, while denser roots rely on lignin, impacting plant strategies and evolution.
Area of Science:
- Plant Biology
- Ecology
- Biochemistry
Background:
- Root traits influence plant evolution and function, with carbon as a key economic currency.
- Previous studies explored root economics but overlooked diverse carbon-related molecular traits.
Purpose of the Study:
- To investigate the co-variation between root economics space and molecular-level carbon traits.
- To understand how molecular carbon diversity shapes root form and function in tropical trees.
Main Methods:
- Utilized data from 66 tree species in a tropical forest.
- Employed nuclear magnetic resonance to analyze molecular-level carbon traits in fine roots.
- Correlated root economics traits with molecular carbon composition.
Main Results:
- Root economics space co-varies with molecular carbon traits.
- Thinner fine roots showed higher carbohydrates and less molecular carbon diversity than thicker roots.
- Mass-denser roots had more lignin and aromatic compounds, but less bioactive compounds, than lighter roots.
Conclusions:
- Molecular-level carbon traits provide new insights into the multidimensional root economics space.
- Root economics shifts reflect a transition from soil exploration to mycorrhizal collaboration and from acquisitive to conservative strategies.
- Findings are fundamental to understanding plant evolution, species coexistence, and adaptation to diverse environments.
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