Figure 2.

Synchrony of meiotic prophase in vivo and in vitro. Synchrony was judged by telomere distances (top) and telomere angles (bottom). Boxes include the 2nd and 3rd quartiles (25th through 75th percentiles), the horizontal line through the box is the median, and whiskers extend to the range. (a) Meiotic nuclei are synchronous throughout a single anther. Three sets of five nuclei were randomly selected from a single anther fixed immediately (0 h, white boxes) and after 10 h in culture (gray boxes). (b) Meiotic nuclei from one floret are synchronous. The three anthers of a single floret were fixed immediately (0 h). Distributions represent 10 nuclei per anther. (c) Dissected anthers progress synchronously in vitro. One anther was fixed immediately (0 h, white box, n = 10); two anther halves were cultured for 10 h (gray boxes, n₁ = 9, n₂ = 10).