GELLMORE at PEARL.TUFTS.EDU
Thu Jun 3 09:00:00 EST 1993
The corn mesocotyl is the first internode of a corn seedling. Subsequent\
internodes progressively widen during establishment growth of the
developing seedling. Prop roots emerge from nodes, most conspicuously
those above the mesocotyl. In anything larger than a seedling, the
mesocotyl will appear as a constricted part of the shoot just below
the soil surface. Large roots circumvent this potential bottleneck
by developing above it, on larger nodes that developed after the
mesocotyl growth ceased.
A fine diagram and discussion of corn seedling development, including
the fate of the mesocotyl is found on pp 731-732 in Foster, A.S., and
E.M. Gifford 1974. Comparative Morphology of Vascular Plants 2nd ed.
There exists a 3rd ed., but I don't know the page numbers for that one.
Note that the original diagrams were published by the great German
morphologist, Wilhelm Troll.
Hope this helps, George Ellmore
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