The Developmental Genetics of the Rg Mutant in Maize

The viviparous8 mutation delays vegetative phase change and accelerates the rate of seedling growth in maize

“…To determine whether vp8 affects internal tissue as well as the leaf epidermis, double mutants were constructed between vp8and Ragged leavesl (Rgl). Rgl is a dominant mutation that causes cytolysis of mesophyll cells with an indirect effect on epidermal cells (Mericle, 1950). Rgl expression first becomes visible at approximately the same time as other adult traits, is delayed by the heterochronic Teopod mutations, and is unaffected by the epidermisspecific heterochronic mutation, g115 (Bongard-Pierce et aL, 1996;Evans et aL, 1994).…”

Foliar Venation of Angiosperms. Ii. Histogenesis of the Venation of Liriodendron

“…marginal initials is more variable. With the exceptionof Drimys and Zea (Mericle, 1950), in all previous accounts of marginal growth in angiosperms (Foster, 1936), the adaxial layer produced the palisade layer only, the remaining portion of the inner leaf tissues being derived from the abaxial layer or from the submarginal initials directly.…”

A Reconstruction of Cell Development in the Shoot Apex of Maize

“…The anatomical evidence suggests that all the sub-epidermal cells in the leaf arise from a single cell layer in the apex at the "block meristem" (Abbe et al, 1951) and probably not from two layers as reported by Esau (1943) and Mericle (1949). The same conclusion is derived from somatic mutation data, where the youngest primordial leaf and the next leaf to be formed give completely white sectors in the wd/ Y g2 strain, rather than a yellow-green color.…”