scholarly journals Selenium and the elemental defense hypothesis

2008 ◽  
Vol 177 (3) ◽  
pp. 569-572 ◽  
Author(s):  
John Trumble ◽  
Mary Sorensen
Keyword(s):  
Elemental Defense

Exploring Lower Limits of Plant Elemental Defense by Cobalt, Copper, Nickel, and Zinc

2013 ◽  
Vol 39 (5) ◽  
pp. 666-674 ◽  
Author(s):  
Dorothy J. Cheruiyot ◽  
Robert S. Boyd ◽  
William J. Moar
Keyword(s):  
Copper Nickel ◽  
Elemental Defense ◽  
Lower Limits ◽  
Cobalt Copper

scholarly journals On the Ecology of Selenium Accumulation in Plants

Plants ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 197 ◽  
Author(s):  
Elizabeth A. H. Pilon-Smits
Keyword(s):  
Dry Weight ◽  
Ecological Impacts ◽  
Trophic Levels ◽  
Future Research ◽  
Negative Effects ◽  
Low Concentrations ◽  
Elemental Defense ◽  
Litter Deposition ◽  
High Concentrations ◽  
Local Ecosystem

Plants accumulate and tolerate Se to varying degrees, up to 15,000 mg Se/kg dry weight for Se hyperaccumulators. Plant Se accumulation may exert positive or negative effects on other species in the community. The movement of plant Se into ecological partners may benefit them at low concentrations, but cause toxicity at high concentrations. Thus, Se accumulation can protect plants against Se-sensitive herbivores and pathogens (elemental defense) and reduce surrounding vegetation cover via high-Se litter deposition (elemental allelopathy). While hyperaccumulators negatively impact Se-sensitive ecological partners, they offer a niche for Se-tolerant partners, including beneficial microbial and pollinator symbionts as well as detrimental herbivores, pathogens, and competing plant species. These ecological effects of plant Se accumulation may facilitate the evolution of Se resistance in symbionts. Conversely, Se hyperaccumulation may evolve driven by increasing Se resistance in herbivores, pathogens, or plant neighbors; Se resistance also evolves in mutualist symbionts, minimizing the plant’s ecological cost. Interesting topics to address in future research are whether the ecological impacts of plant Se accumulation may affect species composition across trophic levels (favoring Se resistant taxa), and to what extent Se hyperaccumulators form a portal for Se into the local food chain and are important for Se cycling in the local ecosystem.

Extending the Elemental Defense Hypothesis: Dietary Metal Concentrations Below Hyperaccumulator Levels Could Harm Herbivores

2005 ◽  
Vol 31 (8) ◽  
pp. 1669-1681 ◽  
Author(s):  
Christina M. Coleman ◽  
Robert S. Boyd ◽  
Micky D. Eubanks
Keyword(s):  
Metal Concentrations ◽  
Elemental Defense

Elemental defense of nickel hyperaccumulator seeds against a generalist insect granivore

2018 ◽  
Vol 33 (3) ◽  
pp. 561-570 ◽  
Author(s):  
Katherine Anne Mincey ◽  
Robert Stephen Boyd
Keyword(s):  
Nickel Hyperaccumulator ◽  
Elemental Defense ◽  
Generalist Insect

scholarly journals The current status of the elemental defense hypothesis in relation to pathogens

2013 ◽  
Vol 4 ◽  
Author(s):  
Anja C. Hörger ◽  
Helen N. Fones ◽  
Gail M. Preston
Keyword(s):  
Current Status ◽  
Elemental Defense

Testing the Joint Effects Hypothesis of Elemental Defense using Spodoptera Exigua

2015 ◽  
Vol 41 (2) ◽  
pp. 168-177 ◽  
Author(s):  
Dorothy J. Cheruiyot ◽  
Robert S. Boyd ◽  
William Moar
Keyword(s):  
Spodoptera Exigua ◽  
Joint Effects ◽  
Elemental Defense
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