| Categories genes  | Tags seed  seed germination  ABA 
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  • Key message
    • This study isolated a gene (OsFbx352) from rice encoding an F-box domain protein and characterized its role in seed germination
    • The transcripts of OsFbx352 were increased upon imbibition of rice seeds and the increase was markedly suppressed by glucose
    • Germination of seeds with overexpression of OsFbx352 was less suppressed by glucose than that of wild-type seeds, while glucose had greater inhibition for germination of seeds with knockdown of OsFbx352 by RNA interference (RNAi) than that of wild-type seeds
    • The differential response of germination of the transgenic and wild-type seeds to glucose may be accounted for by differences in ABA content among overexpressing, RNAi, and wild-type seeds such that overexpression of OsFbx352 and knockdown of OsFbx352 led to lower and higher ABA contents, respectively, than that of wild-type seeds in the presence of glucose
    • These findings indicate that OsFbx352 plays a regulatory role in the regulation of glucose-induced suppression of seed germination by targeting ABA metabolism
    • A rice F-box gene, OsFbx352, is involved in glucose-delayed seed germination in rice
    • Overexpression of OsFbx352 led to a reduction in expression of genes responsible for ABA synthesis (OsNced2, OsNced3) and an increase in expression of genes encoding ABA catabolism (OsAba-ox2, OsAba-ox3) in the presence of glucose
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