Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 547845
Title Homoeostatic maintenance of nonstructural carbohydrates during the 2015–2016 El Niño drought across a tropical forest precipitation gradient
Author(s) Dickman, Lee Turin; McDowell, Nate G.; Grossiord, Charlotte; Collins, Adam D.; Wolfe, Brett T.; Detto, Matteo; Wright, S.J.; 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.
Source Plant, Cell & Environment 42 (2019)5. - ISSN 0140-7791 - p. 1705 - 1714.
DOI https://doi.org/10.1111/pce.13501
Department(s) Forest Ecology and Forest Management
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) climate - ENSO - NSC - Panama - storage - sugars - tropics - vegetation
Abstract

Nonstructural carbohydrates (NSCs) are essential for maintenance of plant metabolism and may be sensitive to 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. 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 a large variation across species at all sites, but total foliar NSCs were positively correlated with leaf mass per area, whereas branch sugars were positively related to leaf temperature and negatively correlated with daily photosynthesis and wood density. The NSC homoeostasis across a wide range of conditions suggests that NSCs are an allocation priority in moist tropical forests.

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