Plant Ecology in a Changing World
  • Topics
    • Topic Overview
    • Biomes and Climates in a Changing World >
      • Adaptation, biodiversity, and environment
      • Climate constrains plant distributions
      • Biome and climate relationships
      • Deserts
      • Grassland, savanna, and shrub biomes
      • Forest biomes
      • Alpine and tundra biomes
    • Plant adaptation >
      • Plant microclimate 1
      • Plant microclimate 2
      • Leaf energy budgets
      • Water movement through the soil-plant continuum
      • Principles of photosynthesis
      • Photosynthesis responses to light and temperature
      • Environmental stresses limit resource capture and use
      • Nutrients in the environment
      • Adaptation to environmental stress
    • Resource Allocation Changes with Environment >
      • Architecture and canopy processes
      • Plant phenology and resource allocation enhance performance
      • Leaf economic spectrum
      • Life history and reproduction
      • Defense against herbivory
      • Plant competition
    • Plant Responses to a Changing World >
      • Global changes occurring today
      • Invasive species
      • Atmospheric CO2 impacts plant
      • C3/C4 photosynthesis and climate
      • Climate change and the global carbon cycle
      • Climate warming and its impacts
    • Engineering Plant Communities >
      • Remember Utah's past and envision our future
      • Restoration ecology
      • Managed ecosystems
      • Utah urban ecology
      • Urban ecological futures
  • Assignments
    • Assignment Overview
    • Discussion
    • Problem sets
    • Ecology & Global Changes
    • Plant ecology policy
    • Defense of policy
    • Exam #1
    • Exam #2
  • Campus
    • Campus Overview
    • Grasses
    • Green infrastructure >
      • GI Overview
      • Stormwater >
        • GI 1
        • GI 2
        • GI 3
        • GI 4
        • GI 10
      • Green roof
      • Pollinator >
        • Pollinator species
    • Trees of the Wasatch
    • Shrubs of the Wasatch
    • Invasives
  • Biomes
    • Biome Overview
    • Climate diagrams
    • Vegetation sight-seeing trip
    • Biome images
  • Models
  • Lab

Page 163




Now, in the Lactuca serriola growth and leaf re-orientation experiments, not all plants were of equal size at the end of the experiment. This may indicate that there were some genetic differences in the plants we randomly chose for these experiments. However, when we measured the relationships between reproductive output (number of flowers produced) and plant size, there were quite interesting results (see below). The "natural orientation" is our control group and the "horizontal orientation" is our experimental group. the two regression slopes are significantly different from each other.

Picture
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Jim Ehleringer, University of Utah