Boron mobility in deciduous forest trees in relation to their polyols.
Tarja Lehto1, Mikko Räisänen1, Anu Lavola1,2
1University of Joensuu, Faculty of Forestry, PO Box 111, 80101 Joensuu, Finland.
The New Phytologist
|April 20, 2021
Summary
Boron (B) mobility in deciduous trees varies. While polyols influence B translocation, remobilization occurs in many species, even those with low polyol content, suggesting complex transport mechanisms.
Area of Science:
- Plant physiology
- Nutrient transport
- Forest ecology
Background:
- Boron (B) mobility in plants is species-dependent, often linked to polyol translocation.
- Understanding B remobilization is crucial for plant nutrition and forest health.
Purpose of the Study:
- To investigate Boron mobility across various deciduous tree species.
- To determine the relationship between Boron mobility and the presence of polyols.
Main Methods:
- Utilized stable isotope 10B as a tracer applied to mature leaves.
- Analyzed 10B concentrations in subsequently harvested growing leaves.
Main Results:
- Extensive B mobility observed in Sorbus aucuparia and Prunus padus (high sorbitol).
- Significant B translocation also noted in Ulmus glabra, Alnus incana, Fraxinus excelsior, Betula pubescens, and Larix sibirica.
- Boron remobilization was limited in Alnus glutinosa, despite similar polyol levels to Alnus incana.
Conclusions:
- Boron mobility is not solely dictated by polyol presence, indicating other factors influence its translocation.
- Remobilization of Boron appears to be a more widespread phenomenon in deciduous trees than previously assumed.
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