A simplified model illustrating the regulation of PtrPAT1 mediated under cold stress in trifoliate orange. (IMAGE)
Caption
A simplified model illustrating the regulation of PtrPAT1 mediated under cold stress in trifoliate orange. Exposure to cold induces PtrPAT1, which transactivates PtrBADH-l by directly binding to its promoter, thus enhancing GB accumulation. Moreover, the cold-induced PtrPAT1 could regulate the expression of PtrPOD and PtrSOD either directly or indirectly, thus facilitating ROS removal. This, along with the two independent pathways, ultimately enhances the cold tolerance of P. trifoliata. The solid lines indicate a direct role, and dashed lines indicate an indirect role. Whether PtrPAT1 regulates the transcription of PtrPOD and PtrSOD in other ways needs further investigation.
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Horticulture Research
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