English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Variation in plant defense phenotypes is often related to biotic and abiotic environmental conditions. In this study we investigate populations the wild cotton, Gossypium davidsonii, to determine the extent to which leaf defense traits secondary chemistry and trichome production exhibit plastic responses to environmental variation in herbivory, water, and nutrient levels. Populations of G. davidsonii were subjected to two experiments under greenhouse conditions: (1) young, eight-leaf stage plants were subjected to mechanical leaf damage to test the effect of simulated herbivory on defense phenotypes, and (2) three month-old plants were subjected to nutrient and water treatments (high and low) in a factorial design to test for their effects on leaf defense phenotypes. Response variables in these analyses were trichome density (no./cm 2 ), gossypol concentration (mg/kg dry leaf), and density of gossypol-containing lysigenous cavities (no./cm 2 ). Despite the relatively large differences in environmental conditions imposed by our experiments, we found that most of the observed phenotypic variation for each leaf defense trait was attributable to genetically-based differences among populations. Nonetheless, we discovered that plants subjected to higher simulated levels of herbivory or abiotic stress had lower overall defense trait values. The high observed

Variation in plant defense traits and population genetics within a Sonoran Desert cotton endemic, Gossypium davidsonii and boll weevil, Anthonomus grandis