Ecol Evol. 2015 Nov 19;5(23):5711-21. doi: 10.1002/ece3.1819. eCollection 2015 Dec.
Drought and shade deplete nonstructural carbohydrate reserves in seedlings of five temperate tree species.
Ecology and evolution
Andrea J Maguire, Richard K Kobe
Affiliations
Affiliations
- Department of Plant Biology Michigan State University East Lansing Michigan.
- Department of Plant Biology Michigan State University East Lansing Michigan; Graduate Program in Ecology, Evolutionary Biology and Behavior Michigan State University East Lansing Michigan; Department Forestry Michigan State University East Lansing Michigan.
PMID: 27069619
PMCID: PMC4813112 DOI: 10.1002/ece3.1819
Abstract
Plants that store nonstructural carbohydrates (NSC) may rely on carbon reserves to survive carbon-limiting stress, assuming that reserves can be mobilized. We asked whether carbon reserves decrease in resource stressed seedlings, and if NSC allocation is related to species' relative stress tolerances. We tested the effects of stress (shade, drought, and defoliation) on NSC in seedlings of five temperate tree species (Acer rubrum Marsh., Betula papyrifera Marsh., Fraxinus americana L ., Quercus rubra L., and Quercus velutina Lam.). In a greenhouse experiment, seedlings were subjected to combinations of shade, drought, and defoliation. We harvested seedlings over 32-97 days and measured biomass and NSC concentrations in stems and roots to estimate depletion rates. For all species and treatments, except for defoliation, seedling growth and NSC accumulation ceased. Shade and drought combined caused total NSC decreases in all species. For shade or drought alone, only some species experienced decreases. Starch followed similar patterns as total NSC, but soluble sugars increased under drought for drought-tolerant species. These results provide evidence that species deplete stored carbon in response to carbon limiting stress and that species differences in NSC response may be important for understanding carbon depletion as a buffer against shade- and drought-induced mortality.
Keywords: Carbon reserves; carbon starvation; nonstructural carbohydrates; soluble sugars; starch; stress
References
- Ecology. 2007 Apr;88(4):1000-11 - PubMed
- New Phytol. 2007;175(1):11-28 - PubMed
- Plant Cell Environ. 2007 Sep;30(9):1126-49 - PubMed
- New Phytol. 2008;178(4):719-39 - PubMed
- Plant Cell Environ. 2009 Jul;32(7):859-74 - PubMed
- Tree Physiol. 2009 Jun;29(6):753-64 - PubMed
- Proc Natl Acad Sci U S A. 2009 Apr 28;106(17):7063-6 - PubMed
- Ecology. 2010 Jan;91(1):166-79 - PubMed
- New Phytol. 2010 Apr;186(2):274-81 - PubMed
- New Phytol. 2010 Aug;187(3):666-81 - PubMed
- Plant Cell Environ. 2011 Mar;34(3):514-24 - PubMed
- Proc Natl Acad Sci U S A. 2010 Dec 14;107(50):21289-94 - PubMed
- Proc Natl Acad Sci U S A. 2011 Jan 25;108(4):1474-8 - PubMed
- J Exp Bot. 2011 Mar;62(6):1715-29 - PubMed
- Plant Physiol. 2011 Mar;155(3):1051-9 - PubMed
- New Phytol. 2011 May;190(3):750-9 - PubMed
- Plant Sci. 2011 Apr;180(4):604-11 - PubMed
- Tree Physiol. 2011 Mar;31(3):250-7 - PubMed
- Plant Biol (Stuttg). 2012 Jan;14(1):142-8 - PubMed
- Proc Natl Acad Sci U S A. 2012 Jan 3;109(1):233-7 - PubMed
- Tree Physiol. 2012 Jun;32(6):764-75 - PubMed
- Nature. 2012 Nov 29;491(7426):752-5 - PubMed
- New Phytol. 2013 Feb;197(3):862-72 - PubMed
- New Phytol. 2013 Mar;197(4):1142-51 - PubMed
- Plant Cell Environ. 2014 Jan;37(1):153-61 - PubMed
- New Phytol. 2013 Dec;200(4):1234-46 - PubMed
- Annu Rev Plant Biol. 2014;65:667-87 - PubMed
- Oecologia. 1999 Oct;121(1):1-11 - PubMed
- Oecologia. 1994 Aug;98(3-4):419-428 - PubMed
- Oecologia. 2002 Apr;131(2):175-185 - PubMed
Publication Types