Northern ragweed ecotypes flower earlier and longer in response to elevated CO2: what are you sneezing at?

  title={Northern ragweed ecotypes flower earlier and longer in response to elevated CO2: what are you sneezing at?},
  author={Kristina A. Stinson and Jennifer M. Albertine and Laura M. S. Hancock and Tristram G. Seidler and Christine A. Rogers},
Significant changes in plant phenology and flower production are predicted over the next century, but we know relatively little about geographic patterns of this response in many species, even those that potentially impact human wellbeing. We tested for variation in flowering responses of the allergenic plant, Ambrosia artemisiifolia (common ragweed). We grew plants originating from three latitudes in the Northeastern USA at experimental levels of CO2 (400, 600, and 800 µL L−1). We hypothesized… CONTINUE READING
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