2Fast Corn Facts Native of Southern Mexico Grows over 2.5 m (8 feet) C4 plant with a Kranz anatomical structureMonocotGrassAn ear of corn averages 800 kernels in 16 rowsIowa, Illinois, Nebraska and Minnesota account for over 50 percent of the corn grown in the U.S
3The Many Faces of Corn Insecticides Latex paintShaving cream & lotionsToothpasteCheck out for a zillion uses for corn!As author Margaret Visser put it in her book, "Much Depends on Dinner," "You cannot buy anything at all in a North American supermarket which has been untouched by corn…"
4Starting with the Root. . . Fibrous root system Coleoptile Methylene Blue X4ColeoptileColeoptile- Sheath coming from the embryo interpreted as the first leaf of the epicotyl
6POLYARCH VASCULAR BUNDLE ARRANGEMENT Water X4ATRICHOBLASTPERICYLEPHLOEMXYLEMENDODERMISCORTEXWater x10ROOTHAIRTRICHOBLAST
7Branch Roots Pith Cortex Parenchyma pith Branch Root Methylene Blue X4 Water X4Branch RootMethylene Blue X4
8MOVING UP TO THE STEM… Scattered Vascular Bundles Xylem Water X4Water X10Water X10XylemCurled Leaf attached to main stem
9VASCULAR TISSUE Tylose Ray Sieve Plate Xylem Metaxylem Phloem Methylene Blue X40VASCULAR TISSUETyloseRaySieve PlateXylemMetaxylemPhloemSieve Tube MemberMethylene Blue X20Methylene Blue X20Parenchyma
10The xylem and phloem do not just go straight up and down but actually meet at nodes up the stem. Here are some pictures of intersections, where vascular bundles are both seen longitudinally and in cross sectionMethylene Blue X4 Longitudinal Section!Methylene Blue X20 Cross SectionMethylene Blue X10 Cross Section
16REPRODUCTION Lower part of embryo axis is a radicle Coleoriza is a sheath that encloses radiclePlumule is the embryotic shootEndospermCotyledonCotyledon (Scutellum)PlumuleShoot ApexRoot (Radicle)ColeorizaSame thing in XS
17STARCH Starch concentrated in seeds, like these in corn kernels Stained with IKIIKI X20Arise from plastidsTypical starch grain shape/appearanceIKI X10
18Tassels Male Reproductive Structure Each tassel consists of a floret with three stamensWater X10MonoeciousSelf and cross-pollinatingWater X10
19BIBLIOGRAPHYCrang, Richard and Andrew Vassilyev. Plant Anatomy. McGraw-Hill.Dickison, William. Integrative Plant Anatomy. Boston: Academic Press, 2000.Esau, Katherine. Anatomy of Seed Plants. New York: John Wiley and Sons, 1977.Esau, Katherine. Plant Anatomy. New York: John Wiley and Sons, 1967.Hochholdinger, Frank. 03/25/2004. Genetic analysis of Root Formation in Zea Mays. University of Tübingen. 04/25/2005 <http://www.unituebingen.de/ZMBP/research/gghochholdinger.html>.Sengbusch, Peter V. Root Tip of Zea Mays. University of Hamburg. 04/25/2005<www.biologie.uni-hamburg.de/b-online/e40/wurzel.htm>.Simmons, Kent. Internal Anatomy of Roots. University of Winnepeg. 04/27/2005 <www.Webb, David T. Vegetative Features. University of Hawaii at Manoa. 04/25/2005 <http://www.botany.hawaii.edu/faculty/webb/>.