Homeostatic maintenance of non-structural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient
Abstract
Non-structural carbohydrates (NSCs) are essential for maintenance of plant metabolism, and may be sensitive to both short- and long-term climatic variation. NSC variation in moist tropical forests has rarely been studied, so regulation of NSCs in these systems is poorly understood. We measured foliar and branch NSC content in 23 tree species at three sites located across a large precipitation gradient in Panama during the 2015-2016 El Niño to examine how short- and long-term climatic variation impact carbohydrate dynamics. Across all sites, leaf NSCs increased over diurnal time-periods. There was no significant difference in total NSCs as the drought progressed (leaf p=0.32, branch p=0.30), nor across the rainfall gradient (leaf p=0.91, branch p=0.96). Foliar soluble sugars decreased while starch increased over the duration of the dry period, suggesting greater partitioning of NSCs to storage than metabolism or transport as drought progressed. There was large variation across species at all sites, but total foliar NSCs were positively correlated with leaf mass per area, while branch sugars were positively related to leaf temperature and negatively correlated with daily photosynthesis and wood density. The NSC homeostasis across a wide range of conditions suggests that NSCs are an allocation priority in moist tropical forests.
- Authors:
-
[7];
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Atmospheric Science and Global Change Div. (ASGC)
- Swiss Federal Research Inst. WSL, Birmensdorf (Switzerland)
- Smithsonian Tropical Research Inst., Balboa (Panama)
- Princeton Univ., NJ (United States). Dept. of Ecology and Evolutionary Biology
- Smithsonian Tropical Research Inst., Balboa (Panama); Wageningen Univ. and Research, Wageningen (The Netherlands). Forest Ecology and Forest Management Group
- Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental & Climate Sciences Dept.
- Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Botany and Biodiversity Research Centre
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth and Environmental Sciences Area
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1484869
- Alternate Identifier(s):
- OSTI ID: 1489970; OSTI ID: 1561916
- Report Number(s):
- BNL-209646-2018-JAAM; LA-UR-18-31290
Journal ID: ISSN 0140-7791
- Grant/Contract Number:
- SC0012704; 89233218CNA000001; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plant, Cell and Environment
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 5; Journal ID: ISSN 0140-7791
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; NSC; Panama; ENSO; tropics; climate; storage; sugars; vegetation; Biological Science; Earth Sciences
Citation Formats
Dickman, L. Turin, McDowell, Nate G., Grossiord, Charlotte, Collins, Adam D., Wolfe, Brett T., Detto, Matteo, Wright, S. Joseph, Medina-Vega, José A., Goodsman, Devin, Rogers, Alistair, Serbin, Shawn P., Wu, Jin, Ely, Kim S., Michaletz, Sean T., Xu, Chonggang, Kueppers, Lara, and Chambers, Jeffrey Q. Homeostatic maintenance of non-structural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient. United States: N. p., 2018.
Web. doi:10.1111/pce.13501.
Dickman, L. Turin, McDowell, Nate G., Grossiord, Charlotte, Collins, Adam D., Wolfe, Brett T., Detto, Matteo, Wright, S. Joseph, Medina-Vega, José A., Goodsman, Devin, Rogers, Alistair, Serbin, Shawn P., Wu, Jin, Ely, Kim S., Michaletz, Sean T., Xu, Chonggang, Kueppers, Lara, & Chambers, Jeffrey Q. Homeostatic maintenance of non-structural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient. United States. https://doi.org/10.1111/pce.13501
Dickman, L. Turin, McDowell, Nate G., Grossiord, Charlotte, Collins, Adam D., Wolfe, Brett T., Detto, Matteo, Wright, S. Joseph, Medina-Vega, José A., Goodsman, Devin, Rogers, Alistair, Serbin, Shawn P., Wu, Jin, Ely, Kim S., Michaletz, Sean T., Xu, Chonggang, Kueppers, Lara, and Chambers, Jeffrey Q. Tue .
"Homeostatic maintenance of non-structural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient". United States. https://doi.org/10.1111/pce.13501. https://www.osti.gov/servlets/purl/1484869.
@article{osti_1484869,
title = {Homeostatic maintenance of non-structural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient},
author = {Dickman, L. Turin and McDowell, Nate G. and Grossiord, Charlotte and Collins, Adam D. and Wolfe, Brett T. and Detto, Matteo and Wright, S. Joseph and Medina-Vega, José A. and Goodsman, Devin and Rogers, Alistair and Serbin, Shawn P. and Wu, Jin and Ely, Kim S. and Michaletz, Sean T. and Xu, Chonggang and Kueppers, Lara and Chambers, Jeffrey Q.},
abstractNote = {Non-structural carbohydrates (NSCs) are essential for maintenance of plant metabolism, and may be sensitive to both short- and long-term climatic variation. NSC variation in moist tropical forests has rarely been studied, so regulation of NSCs in these systems is poorly understood. We measured foliar and branch NSC content in 23 tree species at three sites located across a large precipitation gradient in Panama during the 2015-2016 El Niño to examine how short- and long-term climatic variation impact carbohydrate dynamics. Across all sites, leaf NSCs increased over diurnal time-periods. There was no significant difference in total NSCs as the drought progressed (leaf p=0.32, branch p=0.30), nor across the rainfall gradient (leaf p=0.91, branch p=0.96). Foliar soluble sugars decreased while starch increased over the duration of the dry period, suggesting greater partitioning of NSCs to storage than metabolism or transport as drought progressed. There was large variation across species at all sites, but total foliar NSCs were positively correlated with leaf mass per area, while branch sugars were positively related to leaf temperature and negatively correlated with daily photosynthesis and wood density. The NSC homeostasis across a wide range of conditions suggests that NSCs are an allocation priority in moist tropical forests.},
doi = {10.1111/pce.13501},
journal = {Plant, Cell and Environment},
number = 5,
volume = 42,
place = {United States},
year = {Tue Dec 11 00:00:00 EST 2018},
month = {Tue Dec 11 00:00:00 EST 2018}
}
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