Figure 2.
EXPA2 Spatiotemporal Expression Pattern Is Tightly Associated with Endosperm Expansion and Depends on an Embryo Signal(s).
(A)ProEXPA2:GUS seeds were imbibed on half-strength Murashige and Skoog (½ MS) medium for the indicated times, and stained overnight to detect GUS activity after seed coats were removed. GUS staining was visualized after bleaching the testa.
(B)ProEXPA2:GUS seeds were imbibed on ½ MS medium in the absence or presence of ABA (10 μM), PAC (20 μM), or PAC (20 μM) + GA (10 μM) for 24 h, and stained overnight after seed coats were removed.
(C) (C) ProEXPA2:GUS seeds were imbibed on ½ MS medium and, at the indicated times (min), seed coats were separated from embryos, incubated on ½ MS for a total of 24 h and stained overnight.