Figure 2.—

Effect of stt1 on pollen. (A) I₂/KI -stained pollen from a stt1/+ heterozygote. (B) DAPI staining to show nuclei of pollen from a stt1/+ heterozygote. (C) The percentage of pollen grains of each size and their relative sizes (to large pollen) are indicated. (D–F) Pollen from T2-9/N wx1/+ +/stt1 heterozygotes with wx1 and stt1 in repulsion phase (parent plant). (D) The percentage of recombinant and nonrecombinant pollen classes (n = 803). (E and F) Pollen from T2-9/N wx1/+ +/stt1 plants stained with I₂/KI without germination (E) or after 60-min incubation on pollen germination medium (F). Arrows point to arrested pollen tubes. (G) The percentage of nongerminated pollen and germinated pollen with long and short pollen tubes. Bars, (A, B, E, and F) 100 μm.