Title: Age, allocation and availability of nonstructural carbon in mature red maple trees
Author: Carbone, Mariah S.; Czimczik, Claudia I.; Keenan, Trevor F.; Murakami, Paula F.; Pederson, Neil; Schaberg, Paul G.; Xu, Xiaomei; Richardson, Andrew D.;
Source: New Phytologist. 200(4): 1145-1155.
Publication Series: Scientific Journal (JRNL)
- The allocation of nonstructural carbon (NSC) to growth, metabolism and storage remains poorly understood, but is critical for the prediction of stress tolerance and mortality.
- We used the radiocarbon (14C) ‘bomb spike’ as a tracer of substrate and age of carbon in stemwood NSC, CO2 emitted by stems, tree ring cellulose and stump sprouts regenerated following harvesting in mature red maple trees. We addressed the following questions: which factors influence the age of stemwood NSC?; to what extent is stored vs new NSC used for metabolism and growth?; and, is older, stored NSC available for use?
- The mean age of extracted stemwood NSC was 10 yr. More vigorous trees had both larger and younger stemwood NSC pools. NSC used to support metabolism (stem CO2) was 1–2 yr old in spring before leaves emerged, but reflected current-year photosynthetic products in late summer. The tree ring cellulose 14C age was 0.9 yr older than direct ring counts. Stump sprouts were formed from NSC up to 17 yr old.
- Thus, younger NSC is preferentially used for growth and day-to-day metabolic demands. More recently stored NSC contributes to annual ring growth and metabolism in the dormant season, yet decade-old and older NSC is accessible for regrowth.
Keywords: C , Acer rubrum (red maple), carbohydrates, radiocarbon (14C), ring growth, sprouts, stem respiration, storage, stump
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- This publication may be available in hard copy. Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Carbone, Mariah S.; Czimczik, Claudia I.; Keenan, Trevor F.; Murakami, Paula F.; Pederson, Neil; Schaberg, Paul G.; Xu, Xiaomei; Richardson, Andrew D. 2013. Age, allocation and availability of nonstructural carbon in mature red maple trees. New Phytologist. 200(4): 1145-1155.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility