Fig. 1.

Mutation of CDKG1 produces a temperature-sensitive fertility defect. (A) Floral shoots of WT and mutant (cdkg1–1) grown at 12 and 23 °C. A single anther from each plant, stained with Alexander’s Stain to illustrate pollen viability (living pollen stains red), is shown below. Viability scores are given in Table S1. (B) SEM of WT and mutant pollen. (Scale bar, 20 μm.)