Corn seed goes through Hypogeal germination which means the energy storage structures of the seed remain below ground when the seed germinates. A key difference of the Hypogeal germination associated with corn is the coleoptile- a temporary sheath that protects the plumule as it pushes through to the soil surface (see picture below). As the plumule expands when it senses red light, the first leaf breaks through the coleoptile and photosynthesis begins soon after. 

Soybean seed goes through Epigeal germination which means that the energy storage structures (cotyledons) are pulled above the soil surface during the germination process. These cotyledons supply stored energy to the developing seedling and begin photosynthesis when they encounter light and turn green. 

 

Summary

In conclusion, a seed is an amazing living factory that is capable of producing a plant and multiplying itself to a factor of 500+ in the case of corn. With better conditions of soil moisture and temperature seedlings will develop faster and at higher rates of survival. Storing seed at low temperature and low humidity ensures that low metabolic rates are maintained and seed viability is prolonged.

 

 

Works Cited

Copeland, L. O., and M. B. McDonald. Principles of Seed Science and Technology. New York, NY: Chapman & Hall, 1995. Print.

"Estimating Soil Moisture by Feel and Appearance." USDA, Apr. 1998. Web. 02 Jan. 2013. <ftp://ftp-fc.sc.egov.usda.gov/MT/www/technical/soilmoist.pdf>.

Isleib, Jim. "Michigan State University- MSU Extension." Soil Temperature, Seed Germination and the Unusual Spring of 2012. N.p., 4 May 2012. Web. 02 Jan. 2013. <http://msue.anr.msu.edu/news/soil_temperature_seed_germination_and_the_unusual_spring_of_2012>.

Meyer, Ron. "Golden Plains Area Extension - Ron Meyer - Planting Corn." Golden Plains Area Extension - Ron Meyer - Planting Corn. Golden Plains Area Extension, 13 Apr. 2011. Web. 02 Jan. 2013. <http://goldenplains.colostate.edu/agri/agri_docs/2011_planting_corn.shtml>.