FIGURE 3 in Morphological traits of gynodioecious Persicaria amphibia (Polygonaceae)

FIGURE 3. LM and SEM micrographs of anther development and pollen morphology: A, C) longitudinal section of mature flower, B, D) cross section of mature flower (A−B: hermaphroditic type, C−D: female type), E−F) anther development of hermaphroditic flower: E) 'stage 6' showing meiotic cell which surrounded by tapetum, F) 'stage 10–11' showing tapetum degenerates and pollen mitotic divisions occur, G) pollen grain with pentagonal arrangement of colpi, H) detail of colpus area, I) semitectate-reticulate sexine ornamentation with free standing columellae in lumen, J−K) anther development of female flower, J) 'stage 6' showing same structure with hermaphrodite anther, K) 'stage 10' of abnormal anther without pollen generate which is comparable with normal anther development (see Fig. 3F); vascular region (V), tapetum (T), epidermis (E), endothecium (EN), collapse locule (CL), pollen grain (PG), meiotic cell (MC), stomium region (SR).