Xiaoli Li, Shiyan Lu, Yaru Yang, Wenjie Wei, Jiali Wei, Xiaojun Yuan*, Ping Li*
Phyton-International Journal of Experimental Botany, Vol.90, No.5, pp. 1387-1400, 2021, DOI:10.32604/phyton.2021.016362
Abstract It is known that the high level of sugar including glucose suppresses seed germination through ABA signal. ABI5 is
an essential component to mediate ABA-dependent seed germination inhibition, but underlying mechanism
needs more investigation. Previous study demonstrated the PIF4 activated the expression of ABI5 to suppress seed
germination in darkness. Here we reported that PIF4 also mediated the seed germination inhibition through ABI5
under high concentration of glucose treatment. Furthermore, we found that PIF4 interacted with PAP1, the central factor to control anthocyanin biosynthesis. Such interaction was confirmed in vitro and in planta. Biochemical
and physiological analysis revealed that PAP1… More >
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