Development of Vegetative and Floral Meristems of Arabidopsis thaliana

Abstract

Seeds were sown on mineral agar and grown under axenic constant conditions. Floral transition and flower primordia were observed at approximately 172 and 220 hr, respectively. The vegetative apex was flat in outline for 160 hr, after which time it was slightly dome shaped; cytohistological zonation was not readily apparent. The inflorescence apex (172 hr) was markedly convex and possessed 3–5 and 4–6 cell layers in the most axial and lateral portions of the apex, respectively. The nucleoli of cells of the T2 layer were larger than cells of the T1 and outer corpus during vegetative development; in contrast, they were equal in size at reproductive stages.

Histological Morphology and Development of the Shoot Apical Meristem of a Rapid-flowering Desert Annual Pectis papposa Gray.

“…In 2-day seedlings, the boundary between the tunica and the corpus was not clear. This was also observed in Arabiodopsis, that there was no clear zonate patterns in early stage of the vegetative apex (Miksche and Brown 1965). It became clear as the tunica-corpus layers increased on day 3.…”

Expression of Light-Harvesting Chlorophyll a/b-Protein Genes Is Phytochrome-Regulated in Etiolated Arabidopsis thaliana Seedlings

“…2000 seeds were sown under a green safelight in 100 mm x 25 mm Petri dishes on two layers of 7.5 cm diameter filter paper. Filters were previously wetted with 2.5 mL of nutrient solution (22). Dishes were sealed with Parafilm, and seeds were allowed to imbibe for 16 to 24 h at 24°C in complete darkness.…”

Photomorphogenesis in Arabidopsis thaliana (L.) Heynh

“…The (Fig. 4) and the time of floral induction, based on the previous studies (14), was fixed at 7 days. Floral primordia were found at 12 light with and without a far red component were compared (Table II).…”