Figure 4.

tnp mutants are defective in other aspects of development. A, Seven-day-old dark-grown pls seedlings showing normal etiolated phenotype. Magnification ×2. B, Seven-day-old dark-grown tnp seedlings showing growth of first true leaves and branched root system. Magnification ×2. C, Shoot apices of pls (left) and tnp (right) 7-d-old dark-grown seedlings. Magnification ×4. D, Forty-day-old pls and tnp plants, showing both normal and late-flowering phenotypes. E, First true leaves of 14-d-old pls and tnp seedlings, showing the more elliptical shape of the tnp leaves. Magnification ×2.