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Comparative nutrient concentration and resorption dynamics in petals and leaves
Bao-Jie Tong1,2, Qiu-Ju Zhao1,2, Hong-Yan Li1,2
1Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, China.
Physiologia Plantarum
|November 15, 2024
Summary
Plant petals and leaves show distinct elemental concentrations and reutilization patterns. Petals are rich in phosphorus and potassium, while leaves accumulate nitrogen, calcium, magnesium, iron, and manganese.
Area of Science:
- Plant Biology
- Ecology
- Biogeochemistry
Background:
- Elemental nutrients are crucial for plant functions and ecological adaptation through reutilization.
- Comparative studies on elemental concentration and reutilization in floral petals versus leaves are scarce.
Purpose of the Study:
- To investigate and compare elemental concentrations and reutilization in petals and leaves across diverse plant species.
- To explore the relationship between elemental nutrition, functional traits, and the differentiation between petals and leaves.
Main Methods:
- Analyzed concentrations of 10 elements in petals and leaves of 38 plant species.
- Assessed functional traits: flower lifespan, dry mass per unit area, water concentration, and vein density.
- Examined elemental resorption and correlations with functional traits.
Main Results:
- Leaves were richer in nitrogen (N), calcium (Ca), magnesium (Mg), iron (Fe), and manganese (Mn); petals showed higher phosphorus (P) and potassium (K).
- Petal concentrations of N, P, K, Ca, Mg, and sodium (Na) correlated positively with leaf concentrations.
- Herbaceous plants exhibited significant P and K resorption in petals, while N, P, and K resorption occurred in leaves across all life forms.
Conclusions:
- Elemental composition and reutilization differ significantly between petals and leaves, reflecting functional specialization.
- Phosphorus (P) resorption in leaves and petals showed a positive correlation.
- Leaf and petal traits related to the carbon economic spectrum, such as dry mass per area and floral longevity, were negatively correlated with P, indicating its role in resource allocation.
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