the effect of allelochemicals on plant growth
DESCRIPTION
The Effect of Allelochemicals on Plant Growth. A project by: Cody Franko Period 10 Honors Biology. Problem and Hypothesis. Problem Statement: How will a plant’s growth be affected if it is planted next to a sweet potato plant that releases high levels of allelochemicals? Hypothesis: - PowerPoint PPT PresentationTRANSCRIPT
The Effect of Allelochemicals on Plant
GrowthA project by: Cody FrankoPeriod 10 Honors Biology
Problem and Hypothesis
Problem Statement: How will a plant’s growth be affected if it is
planted next to a sweet potato plant that releases high levels of allelochemicals?
Hypothesis: If a plant is planted next to a sweet potato
plant that releases high levels of allelochemicals, then the plant will not grow as efficiently.
Basic Concepts Allelopathy- The releasing of
secondary metabolic products into the environment.
Allelochemicals- chemicals that are released by volatilization in the form of edible tissues.
Ipomoea Batatas- the scientific name for a sweet potato plant.
Basic Concepts Do the average garden plants release any
allelochemicals, if so than how much do they release?
What are the levels of allelochemicals released from a sweet potato plant?
How should I water the plants, as one or two separate?
Is there a set temperature the room should be while I grow these plants?
Procedure Plant all of the plants in the pots at different
distances. Use sweet potato plants for allelochemicals
and sunflower plant as average plant. Water daily with 150 mL of water Monitored growth
Design Diagram
Levels 5cm 10cm 15cm 20cm Control: not planted next to sweet potato plant
Trials 6 6 6 6 6
CONSTANTS: Same temperature water, same types of plants, same amount of sunlight, same soil, same amount of water.
Safety Precautions Do not consume plants or soil.
Do not “Play” with pots they might break!
ResultsControl 5 cm 10cm 15 cm 20 cm
Trial 1 14 7 7.5 9 11Trial 2 13 7 7 10 12.5Trail 3 13 9 8 6 12Trail 4 14 8 8 10 9Trail 5 12 10 8 10 13Trail 6 10 8 6 12 12Average Height
12.7 cm
8.1 cm 7.5 cm 9.5 cm 11.6 cm
Null Hypothesis Allelochemicals have no effect
on plant growth.
Anova TestANOVA: ResultsSource of Sum of d.f. Mean FVariation Squares Squares between 118.9 4 29.72 14.55error 51.08 25 2.043 Total 170.0 29
Significance of 0.00 Null can be rejected
Photodocumentation
Photodocumentation
Photodocumentation
Graph
ConclusionAllelochemicals do have an effect on plant growth.
Hypothesis was supported
Sources of Error Not exposed to enough Sunlight
Not enough time given for plants to grow
Inconsistent amounts of water
Improvements More trials
Done in warmer and sunnier conditions
More precise measurements
Extensions and Applications
Do experiment with different plant types like weeds and fruits
Useful for gardening techniques
Acknowledgements Mrs. Pietrangelo
My Mom
Bibliography Ferguson, James, and Bala Rathinasabapathi. "Allelopathy: How Plants Suppress
Other Plants." University of Florida, July 2003. Web. 5 Oct. 2010. <http://edis.ifas.ufl.edu/hs186>.
INDERJIT, and K. G. MUKERJI. Allelochemicals: Biological Control of Plant Pathogens and Diseases. Dordrecht: Springer, 2006. Print.
Kavassalis, Catherine. "Allelopathy for the Home Gardener." Halton HELPs. Web. 05Oct. 2010. <http://haltonhelps.org/Egardening/Allelopathy.htm>.
Harrison, Howard, and Joseph Peterson. Allelopathic Effects of Sweet Potatoes onYellow Nutsedge and Alfalfa 34.4 (1986): 623-27. Web. 5 Oct. 2010. <http://http:// www.jstor.org/pss/4044250>.
Hunter, Sheri. "Guidelines for Watering Indoor Plants." Guidelines for WateringIndoor Plants. 1 May 2010. Web. 5 Oct. 2010. <http://www.coopext.colostate.edu/4dmg/Plants/guidline.htm>.
Wolford, Ron, and Drusilla Banks. "Sweet Potato - Vegetable Directory - Watch Your Garden Grow - University of Illinois Extension." University of Illinois. Web. 05 Oct. 2010. <http://urbanext.illinois.edu/veggies/sweetpotato.cfm>.