Phenolics lie at the centre of functional versatility in the responses of two phytochemically diverse tropical trees to canopy thinning

Schneider, Gerald F.; Coley, Phyllis D.; Younkin, Gordon C.; Forrister, Dale L.; Mills, Anthony G.; Kursar, Thomas A.

doi:10.1093/jxb/erz308

Title: Phenolics lie at the centre of functional versatility in the responses of two phytochemically diverse tropical trees to canopy thinning

Journal Article · 28 June 2019 · Journal of Experimental Botany

DOI: https://doi.org/10.1093/jxb/erz308 · OSTI ID:1625390

^[1];

^[2]; Younkin, Gordon C. ^[3]; Forrister, Dale L. ^[3]; Mills, Anthony G. ^[3]; Kursar, Thomas A. ^[2]

Univ. of Utah, Salt Lake City, UT (United States); Smithsonian Tropical Research Institute, Panama City (Panama); DOE/OSTI
Univ. of Utah, Salt Lake City, UT (United States); Smithsonian Tropical Research Institute, Panama City (Panama)
Univ. of Utah, Salt Lake City, UT (United States)

Saplings in the shade of the tropical understorey face the challenge of acquiring sufficient carbon for growth as well as defence against intense pest pressure. A minor increase in light availability via canopy thinning may allow for increased investment in chemical defence against pests, but it may also necessitate additional biochemical investment to prevent light-induced oxidative stress. The shifts in secondary metabolite composition that increased sun exposure may precipitate in such tree species present an ideal milieu for evaluating the potential of a single suite of phenolic secondary metabolites to be used in mitigating both abiotic and biotic stressors. To conduct such an evaluation, we exposed saplings of two unrelated species to a range of light environments and compared changes in their foliar secondary metabolome alongside corresponding changes in the abiotic and biotic activity of their secondary metabolite suites. Among the numerous classes of secondary metabolites found in both species, phenolics accounted for the majority of increases in antioxidant and UV-absorbing properties as well as activity against an invertebrate herbivore and a fungal pathogen. Our results support the hypothesis that phenolics contribute to the capacity of plants to resist co-occurring abiotic and biotic stressors in resource-limited conditions.

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Research Organization:: University of Utah, Salt Lake City, UT (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC); USEPA

OSTI ID:: 1625390

Journal Information:: Journal of Experimental Botany, Journal Name: Journal of Experimental Botany Journal Issue: 20 Vol. 70; ISSN 0022-0957

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United States

Language:: English

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Data from: Phenolics lie at the center of functional versatility in the responses of two phytochemically diverse tropical trees to canopy thinning Schneider, Gerald F.; Coley, Phyllis D.; Younkin, Gordon C. Dryad https://doi.org/10.5061/dryad.t469v60	dataset	January 2020
Data from: Phenolics lie at the center of functional versatility in the responses of two phytochemically diverse tropical trees to canopy thinning Schneider, Gerald F.; Coley, Phyllis D.; Younkin, Gordon C. Dryad https://doi.org/10.5061/dryad.t469v60	dataset	January 2020

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Title: Phenolics lie at the centre of functional versatility in the responses of two phytochemically diverse tropical trees to canopy thinning

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