Day 7, 8
Day 7, 8. As the radicle grows and the cells differentiate, it looks like a taproot. The lateral roots (white arrow) continue to grow from the radicle and the cotyledons (yellow arrow) start to appear. The unifoliate leaves (blue arrow) are just peeking out.
Figure 16. Lateral roots, cotyledons, and unifoliate leaves. The lateral roots (white arrow) are growing from the radicle. The emerging cotyledons (yellow arrow) with the unifoliate leaves (blue arrow) are peeking out. Credit: E.T. Paparozzi
Figure 17. Trichomes on the unifoliate leaves. A closer look at the unifoliate leaves (inside the seed coat) reveals that they are covered with shiny hair-like structures called trichomes (arrow). Magnified 7.9 times. Credit: E.T. Paparozzi