Figure 4.

Rescue of the rte Phenotype by Exogenous Boric Acid Application.

(A), (C), (E), and (J) Tassels of wild-type and rte-1 plants at different boric acid concentrations.

(B), (D), and (F) Leaves of wild-type and rte-1 plants at different boric acid concentrations.

(G) Successful fertilization of a wild-type ear using pollen from an rte-1 tassel treated with 100 μM boric acid.

(H) and (I) Fertile pollen grains in pollen germination media from rte-1 plants rescued with 100 μM boric acid (H) and fertile pollen grains from the wild type (I).

(K) and (L) Ears from rte-1 plants grown in different boric acid concentrations.

(M) Successful cross obtained using an ear from a rte-1 plant treated with 200 μM boric acid and wild-type pollen.

Bars = 2 cm.