plant productivity crystal, barney, nate, rachael, cameron, and puja atlantic forest, brazil see-u...
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Plant ProductivityPlant Productivity
Crystal, Barney, Nate, Crystal, Barney, Nate, Rachael, Cameron, and PujaRachael, Cameron, and Puja
Atlantic Forest, BrazilAtlantic Forest, Brazil
SEE-U 2000SEE-U 2000
IntroductionIntroduction
Plants allocate their energy and Plants allocate their energy and resources in a manner that is resources in a manner that is conducive for efficient growthconducive for efficient growth
Different species therefore may put Different species therefore may put more energy into the formation of more energy into the formation of roots or in the formation of shootsroots or in the formation of shoots
By determining the root/shoot ratio By determining the root/shoot ratio we can study these growth patternswe can study these growth patterns
HypothesesHypotheses
Null Hypothesis: There will be no Null Hypothesis: There will be no difference among species in root/shoot difference among species in root/shoot ratioratio
Alternative Hypothesis #1: Native Alternative Hypothesis #1: Native species (Acacia) will show a greater species (Acacia) will show a greater root/shoot ratioroot/shoot ratio
Alternative Hypothesis #2: Non - Alternative Hypothesis #2: Non - native species (Eucalyptus) will show a native species (Eucalyptus) will show a greater root/shoot ratiogreater root/shoot ratio
MethodologyMethodology
Three species were studied: Three species were studied: Eucalyptus Eucalyptus camal, Eucalyptus citrio, and Acacia camal, Eucalyptus citrio, and Acacia
16 individuals of each species were 16 individuals of each species were randomly selected from the IPE Nurseryrandomly selected from the IPE Nursery
Soil was separated from the roots Soil was separated from the roots Root length was measured from the first Root length was measured from the first
root to the root apical meristemroot to the root apical meristem Shoot length was measured from the first Shoot length was measured from the first
root to the apical meristemroot to the apical meristem
Seedlings in NurserySeedlings in Nursery
ResultsResults
Root/shoot ratios are as follows: Root/shoot ratios are as follows: – E. camal :3.8/1E. camal :3.8/1– E. citrio: 3.3/1E. citrio: 3.3/1– Acacia sp.:2.7/1 Acacia sp.:2.7/1
The Null Hypothesis was accepted.The Null Hypothesis was accepted.
Mean Rank of Root/Shoot Mean Rank of Root/Shoot RatioRatio
Ranks
16 23.63
16 29.41
15 18.63
47
VAR000011
2
3
Total
VAR00002N Mean Rank
Chi-Square Test ResultsChi-Square Test Results
Test Statisticsa,b
4.798
2
.091
Chi-Square
df
Asymp. Sig.
VAR00002
Kruskal Wallis Testa.
Grouping Variable: VAR00001b.
Analysis of Variance Analysis of Variance ResultsResults
ANOVA
VAR00002
12.819 2 6.410 2.668 .081
105.688 44 2.402
118.507 46
Between Groups
Within Groups
Total
Sum ofSquares df Mean Square F Sig.
Discussion/ConclusionDiscussion/Conclusion
A statistical analysis showed that A statistical analysis showed that there was no significant difference there was no significant difference between species with respect to between species with respect to root/shoot ratioroot/shoot ratio
Within species there was a wide Within species there was a wide range of root/shoot ratio affecting range of root/shoot ratio affecting the statistical analysisthe statistical analysis
Discussion/Conclusion (2)Discussion/Conclusion (2)
This can be attributed to small This can be attributed to small sample size, cold weather (frost), sample size, cold weather (frost), and age of seedlingsand age of seedlings
There may be a greater variation There may be a greater variation of root/shoot ratios among the of root/shoot ratios among the three species at a later stage of three species at a later stage of developmentdevelopment
IPE Nursery at the Morro IPE Nursery at the Morro do Diabo park reservedo Diabo park reserve