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. 2021 Mar 21;186(2):1143–1158. doi: 10.1093/plphys/kiab131

Figure 8.

Figure 8

FEX mutant flowers are sensitive to fluoride and cannot produce viable seed. A, Flowering plants grown on regular soilless substrate Fafard Growing mix #2. Heterozygote FEX/fex plants appear WT and homozygote fex/fex plants have shorter flower stalks. B, Heterozygote flowers were phenotypically identical to WT. C, fex/fex flowers at a later time point were dead. D, Flower sepals on fex/fex mutant were chlorotic. E, Chlorosis in fex/fex cauline leaf tip. F, Stage 13 FEX/fex flower grown under low fluoride conditions (∼2-μM) opened to reveal pollen-shedding stamen. G, Stage 13 fex/fex flower opened to reveal stunted stamen with no pollen shed. Scale bars are 1 mm.