Proposed model for the role of the MsABI5-MsSMXL1-MsNAC022 cascade in enhancing drought resistance. (IMAGE)

Nanjing Agricultural University The Academy of Science

Proposed model for the role of the MsABI5-MsSMXL1-MsNAC022 cascade in enhancing drought resistance.

Caption

Proposed model for the role of the MsABI5-MsSMXL1-MsNAC022 cascade in enhancing drought resistance. SLs activate MsABI5 expression during drought stress in Malus sieversii. MsABI5 directly binds to the MsP5CS2.2 promoter and enhances its expression to stimulate proline accumulation and drought resistance. MsABI5 upregulates MsNAC022 expression but negatively regulates MsSMXL1 expression. MsNAC022 directly binds to the MsP5CS2.2 promoter to enhance proline accumulation during drought stress, and MsSMXL1 interacts with MsNAC022 to repress its transactivation activity, thus attenuating drought tolerance in apple. The → indicates activation. The  indicates repression. MsABI5 → MsP5CS2.2 indicates MsP5CS2.2 is activated by MsABI5. MsABI5 → MsNAC022 indicates MsNAC022 is activated by MsABI5. MsNAC022 → MsP5CS2.2 indicates MsP5CS2.2 is activated by MsNAC022. MsABI5  MsSMXL1 indicates MsSMXL1 is repressed by MsABI5. MsSMXL1  MsNAC022 indicates the transactivation of MsNAC022 to MsP5CS2.2 expression is repressed by MsSMXL1.

Image link: https://academic.oup.com/view-large/figure/521468017/uhaf101f6.tif

Credit

Horticulture Research

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