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Plant Productivity Crystal, Barney, Nate, Rachael, Cameron, and Puja Atlantic Forest, Brazil SEE-U 2000 Introduction Plants allocate their energy and resources in a manner that is conducive for efficient growth

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plant productivity

Plant Productivity

Crystal, Barney, Nate, Rachael, Cameron, and Puja

Atlantic Forest, Brazil

SEE-U 2000

introduction
Introduction
  • Plants allocate their energy and resources in a manner that is conducive for efficient growth
  • Different species therefore may put more energy into the formation of roots or in the formation of shoots
  • By determining the root/shoot ratio we can study these growth patterns
hypotheses
Hypotheses
  • Null Hypothesis: There will be no difference among species in root/shoot ratio
  • Alternative Hypothesis #1: Native species (Acacia) will show a greater root/shoot ratio
  • Alternative Hypothesis #2: Non - native species (Eucalyptus) will show a greater root/shoot ratio
methodology
Methodology
  • Three species were studied: Eucalyptus camal, Eucalyptus citrio, and Acacia
  • 16 individuals of each species were randomly selected from the IPE Nursery
  • Soil was separated from the roots
  • Root length was measured from the first root to the root apical meristem
  • Shoot length was measured from the first root to the apical meristem
results
Results
  • Root/shoot ratios are as follows:
    • E. camal :3.8/1
    • E. citrio: 3.3/1
    • Acacia sp.:2.7/1
  • The Null Hypothesis was accepted.
discussion conclusion
Discussion/Conclusion
  • A statistical analysis showed that there was no significant difference between species with respect to root/shoot ratio
  • Within species there was a wide range of root/shoot ratio affecting the statistical analysis
discussion conclusion 2
Discussion/Conclusion (2)
  • This can be attributed to small sample size, cold weather (frost), and age of seedlings
  • There may be a greater variation of root/shoot ratios among the three species at a later stage of development