Characterization of a mutant of.

Identifies a novel Arabidopsis mutation, cytokinesis defective1 (cyd1), by partial or missing cell walls in stomata. Detection of cytokinesis defects in other cell types throughout the plant; Correlation of nuclear number in abnormal stomata with the extent of cytokinetic partitioning; Lethality of cyd1 with poor seed set and some defective ovules; Necessity of cyd1 gene products for the execution of cytokinesis.