The transcription factor MdERF023 negatively regulates salt tolerance by modulating ABA signaling and Na + /H + transport in apple.

Autor: Chen C; College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China., Zhang Z; College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China., Lei Y; College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China., Chen W; College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China., Zhang Z; College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China., Dai H; College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, China. daihy@syau.edu.cn.
Jazyk: angličtina
Zdroj: Plant cell reports [Plant Cell Rep] 2024 Jul 03; Vol. 43 (7), pp. 187. Date of Electronic Publication: 2024 Jul 03.
DOI: 10.1007/s00299-024-03272-1
Abstrakt: Key Message: MdERF023 is a transcription factor that can reduce salt tolerance by inhibiting ABA signaling and Na + /H + homeostasis. Salt stress is one of the principal environmental stresses limiting the growth and productivity of apple (Malus × domestica). The APETALA2/ethylene response factor (AP2/ERF) family plays key roles in plant growth and various stress responses; however, the regulatory mechanism involved has not been fully elucidated. In the present study, we identified an AP2/ERF transcription factor (TF), MdERF023, which plays a negative role in apple salt tolerance. Stable overexpression of MdERF023 in apple plants and calli significantly decreased salt tolerance. Biochemical and molecular analyses revealed that MdERF023 directly binds to the promoter of MdMYB44-like, a positive modulator of ABA signaling-mediated salt tolerance, and suppresses its transcription. In addition, MdERF023 downregulated the transcription of MdSOS2 and MdAKT1, thereby reducing the Na + expulsion, K + absorption, and salt tolerance of apple plants. Taken together, these results suggest that MdERF023 reduces apple salt tolerance by inhibiting ABA signaling and ion transport, and that it could be used as a potential target for breeding new varieties of salt-tolerant apple plants via genetic engineering.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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