Figure 1.

Dehiscence and Senescence of Wild-Type and delayed dehiscence1 Anthers.

A developmental series of flowers from young to old within a single inflorescence were photographed using a dissecting microscope. Stages 12, 13, late-13 (13L), and 14 of anther development are shown. These stages were defined in Sanders et al. (1999). Inserts of stage 14 anthers were magnified ×2.25 and enhanced digitally. The photographs represent a series of six or seven flowers from wild-type or delayed dehiscence1 inflorescences, respectively.

(A) Wild-type flowers. Floral bud (anther stage 12). Flower at anthesis (anther stage 13). Older open flower (late anther stage 13L). Initial stages of senescence in floral structures after seed set (anther stage 14).

(B) delayed dehiscence1 flowers, representing the same stages shown for the wild type in (A).

A, anther; F, filament; Ov, ovary; Pa, stigmatic papilla; Sg, stigma; Sy, style. .