Arabidopsis flower stage | Anther/pollen development | Barley flower stage | Anther/pollen development |
---|---|---|---|
8 | Sporogenous cells and three anther cell layers | Spike 0–1 cm Zadoks stage 31 | Sporogenous cells and three anther cell layers |
9 | Four anther cell layers, pollen mother cell formed and undergo meiosis | Spike 1–2 cm Zadoks stage 32 | Four anther cell layers, pollen mother cells formed |
10 | Pollen mother cell meiosis completed, and single microspores released from the tetrad | Spike 2–3 cm Zadoks stage 33 | Pollen mother cell meiosis |
Spike 3-4 cm Zadoks stage 33.5 | Released single microspores from tetrad | ||
11 | Single microspores and tapetum undergoes degeneration | Spikes 4–5 cm Zadoks stage 34 | Single microspores and middle layer undergoes crushing |
Spikes 5–6 cm Zadoks stage 35–37 | Vacuolated microspores. Tapetum degenerating | ||
12 | Pollen mitosis I, and tapetum degeneration almost completed | LFE1 Spikes 6–8 cm | Tapetum degeneration finished. Pollen mitosis I begins |
LFE2 Spikes ~9–10 cm | Pollen mitosis I completed | ||
13 | Binuclear pollen. Pollen mitosis II occurs, forming tri-nucleated pollen | LFE3 Spikes ~9–10 cm | Binuclear pollen. Pollen mitosis II occurs. |
LFE4 Spikes ~9–10 cm | Tri-nucleated pollen and anthesis taking place |