How do trees make sweet edible sap in spring?
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- Oxford University Press (License for figure reproduction)
- Damian Cirelli (Consent for figure reproduction)
- Richard Jagels (Consent for figure reproduction)
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How do trees make sweet edible sap in spring? At the end of winter, sap of temperate broadleaf eudicot trees provides energy-rich sugars for animals and peoples of North America. Here, I conduct a multi-disciplinary synthesis to elucidate a theory of sap production and movement at a 'whole tree' level. I begin by contrasting settler knowledge to Indigenous knowledge of maples, and describe how "two-eyed seeing" may be used to address settler appropriation of maples and begin to decolonize maple provisions. Second, with a synthesis of scientific literature I show that sugars are not just byproducts of sap movement, but are signaling molecules that reveal a blurred functional distinction between xylem and phloem. I propose numerous predictions from my theory of sap movement. Finally, when testing whether spring xylem sap sugar concentration correlates with number of cells in the width of xylem rays I found significant positive correlation.
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Copyright © 2018 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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- 2018
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young-howdotreesmakesweetediblesapinspring.pdf | 2023-05-05 | Public | Download |