14 research outputs found
Plant defences mediate interactions between herbivory and the direct foliar uptake of atmospheric reactive nitrogen
Reactive nitrogen from human sources (e.g., nitrogen dioxide, NO2) is taken up by plant roots following deposition to soils, but can also be assimilated by leaves directly from the atmosphere. Leaf uptake should alter plant metabolism and overall nitrogen balance and indirectly influence plant consumers; however, these consequences remain poorly understood. Here we
show that direct foliar assimilation of NO2 increases levels of nitrogen-based defensive metabolites in leaves and reduces herbivore consumption and growth. These results suggest
that atmospheric reactive nitrogen could have cascading negative effects on communities of herbivorous insects. We further show that herbivory induces a decrease in foliar uptake,
indicating that consumers could limit the ability of vegetation to act as a sink for nitrogen pollutants (e.g., smog from mobile emissions). Our study suggests that the interactions of foliar uptake, plant defence and herbivory could have significant implications for understanding the environmental consequences of reactive nitrogen
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Juror Perceptions of Intoxicated Suspects’ Interrogation-Related Behaviors
Alcohol-intoxicated suspects’ confessions are admissible in U.S. courts; however, it is unknown how jurors evaluate such confessions. Study 1 assessed potential jurors’ perceptions of intoxication in interrogative contexts. Many respondents were unaware that questioning intoxicated suspects and presenting subsequent confessions in court are legal, and respondents generally reported they would rely less on intoxicated than sober confessions. In Study 2, potential jurors read a case about a defendant who had confessed or not while sober or intoxicated. Participants who read about an intoxicated defendant perceived the interrogation as more inappropriate and the defendant as more cognitively impaired than did participants who read about a sober defendant, and as a result, they were less likely to convict. Furthermore, intoxicated confessions influenced conviction decisions to a lesser extent than did sober confessions. Findings suggest that investigators might consider abstaining from interrogating intoxicated suspects or else risk jurors finding confessions unconvincing in court