Coleoptile Appearance During Emergence
Bob Nielsen, Extension Corn Production Specialist, Purdue
The coleoptile is a rigid piece of plant tissue that encloses
the first few leaves of the corn seedling as the mesocotyl elongates
and 'pushes' the coleoptile to the soil surface during the emergence
process. For a more complete discussion on the emergence process
in corn, see my Web article at http://www.kingcorn.org/news/articles.04/Emerge-0502.html
Click image to enlarge
Closeup of corn coleoptile.
Coleoptile tissue removed to reveal inner leaves of plumule.
Split in coleoptile side due to expansion of inner leaves.
Inner leaves 'teased' out of coleoptile.
View of kernel, mesocotyl, coleoptile and leaf emergence
just below the soil surface.
Emergence of inner leaves through split tip of coleoptile.