Supplementary material from "Variation in defence strategies in the metal hyperaccumulator plant <i>Noccaea caerulescens</i> is indicative of synergies and trade-offs between forms of defence"

Published on 2019-01-10T08:46:57Z (GMT) by
In the metal hyperaccumulator plant <i>Noccaea caerulescens,</i> zinc may provide a defence against pathogens. However, zinc accumulation is a variable trait in this species. We hypothesize that this variability affects the outcome of interactions between metal accumulation and the various constitutive and inducible defences that <i>N. caerulescens</i> shares with non-accumulator plants. We compare zinc concentrations, glucosinolate concentrations and inducible stress responses, including ROS and cell death, in four <i>N. caerulescens</i> populations, and relate these to the growth of the plant pathogen <i>Pseudomonas syringae</i>, its zinc tolerance mutants and <i>Pseudomonas</i> pathogens isolated from a natural population of <i>N. caerulescens.</i> The populations display strikingly different combinations of defences. Where defences are successful, pathogens are limited primarily by metals, cell death or organic defences; there is evidence of population-dependent trade-offs or synergies between these. In addition, we find evidence that <i>Pseudomonas</i> pathogens have the capacity to overcome any of these defences, indicating that the arms race continues. These data indicate that defensive enhancement, joint effects and trade-offs between different forms of defence are all plausible explanations for the variation we observe between populations, with factors including metal availability and metal-tolerant pathogen load likely shaping the response of each population to infection.

Cite this collection

Fones, Helen N.; M. Preston, Gail; Andrew, J.; Smith, C. (2019): Supplementary material from "Variation in defence strategies in the metal hyperaccumulator plant Noccaea caerulescens is indicative of synergies and trade-offs between forms of defence". The Royal Society. Collection.