ZmSSRP1, transactivated by OPAQUE11, positively regulates starch biosynthesis in maize endosperm.

Further examination of the expression profile of ZmSSRP1 during kernel development showed that the ZmSSRP1 transcript was highly expressed in endosperm, with an increasing trend and peaking at 15 DAP, but very low expression was detected in the embryo during different developmental stages of maize kernels (Figure 1d ).

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