Homeostatic maintenance of nonstructural 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. The NSC variation in NSCs in moist tropical forests has only rarely been studied, however, 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 impacts carbohydrate dynamics. Across all sites, leaf NSCs increased over diurnal time-periods. There was no significant difference in total NSCs over as the progression of the drought progressed (leaf p=0.32, branch p=0.30), nor across the rainfall gradient (leaf p=0.91, branch p=0.96). The Foliar soluble sugars decreased while starch increased :starch ratio did decrease 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 widemore »
- Authors:
-
- Los Alamos National Laboratory
- BATTELLE (PACIFIC NW LAB)
- Smithsonian Tropical Research Institute
- Environmental & Climate Sciences Department, Brookhaven National Laboratory, New York, NY, USA
- Environmental & Climate Sciences Department, Brookhaven National Laboratory, Upton, New York
- Los Alamos National Laboratory, New Mexico
- LOS ALAMOS NATL LAB
- Lawrence Berkeley National Laboratory
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1530825
- Report Number(s):
- PNNL-SA-140513
- DOE Contract Number:
- AC05-76RL01830
- Resource Type:
- Journal Article
- Journal Name:
- Plant, Cell & Environment
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 5
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Dickman, Lee T., McDowell, Nate G., Grossiord, Charlotte, Collins, Adam D., Wolfe, Brett, Detto, Metteo, Wright, Joseph, Medina-Vega, Jose A., Goodsman, Devin W., Rogers, Alistair, Serbin, Shawn, Wu, Jin, Ely, Kim S., Michaletz, Sean, Xu, Chonggang, Kueppers, Lara, and Chambers, Jeffrey Q. Homeostatic maintenance of nonstructural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient. United States: N. p., 2019.
Web. doi:10.1111/pce.13501.
Dickman, Lee T., McDowell, Nate G., Grossiord, Charlotte, Collins, Adam D., Wolfe, Brett, Detto, Metteo, Wright, Joseph, Medina-Vega, Jose A., Goodsman, Devin W., Rogers, Alistair, Serbin, Shawn, Wu, Jin, Ely, Kim S., Michaletz, Sean, Xu, Chonggang, Kueppers, Lara, & Chambers, Jeffrey Q. Homeostatic maintenance of nonstructural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient. United States. https://doi.org/10.1111/pce.13501
Dickman, Lee T., McDowell, Nate G., Grossiord, Charlotte, Collins, Adam D., Wolfe, Brett, Detto, Metteo, Wright, Joseph, Medina-Vega, Jose A., Goodsman, Devin W., Rogers, Alistair, Serbin, Shawn, Wu, Jin, Ely, Kim S., Michaletz, Sean, Xu, Chonggang, Kueppers, Lara, and Chambers, Jeffrey Q. 2019.
"Homeostatic maintenance of nonstructural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient". United States. https://doi.org/10.1111/pce.13501.
@article{osti_1530825,
title = {Homeostatic maintenance of nonstructural carbohydrates during the 2015-2016 El Niño drought across a tropical forest precipitation gradient},
author = {Dickman, Lee T. and McDowell, Nate G. and Grossiord, Charlotte and Collins, Adam D. and Wolfe, Brett and Detto, Metteo and Wright, Joseph and Medina-Vega, Jose A. and Goodsman, Devin W. and Rogers, Alistair and Serbin, Shawn and Wu, Jin and Ely, Kim S. and Michaletz, Sean 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. The NSC variation in NSCs in moist tropical forests has only rarely been studied, however, 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 impacts carbohydrate dynamics. Across all sites, leaf NSCs increased over diurnal time-periods. There was no significant difference in total NSCs over as the progression of the drought progressed (leaf p=0.32, branch p=0.30), nor across the rainfall gradient (leaf p=0.91, branch p=0.96). The Foliar soluble sugars decreased while starch increased :starch ratio did decrease 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},
url = {https://www.osti.gov/biblio/1530825},
journal = {Plant, Cell & Environment},
number = 5,
volume = 42,
place = {United States},
year = {Wed May 01 00:00:00 EDT 2019},
month = {Wed May 01 00:00:00 EDT 2019}
}
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