Figure 8.

Variation in second callose plug position in tomato species. (A) A pollen tube with the second callose plug (arrow) far away from the first callose plug. (B) A pollen tube with the second callose plug (arrow) close to the first callose plug. (C) The proportions of second callose plug position pattern. Black represents tubes with the second callose plug far away the first callose plug; White represents tubes with the second callose plug close to the first callose plug. Bars in (A) and (B) = 50μm.

Qin et al. BMC Plant Biology 2012 12:178   doi:10.1186/1471-2229-12-178
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