Melatonin promotes Al3+ compartmentalization via H+ transport and ion gradients in Malus hupehensis (Record no. 54444)

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control field MX-MdCICY
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control field 20250625162447.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-20348
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Title Melatonin promotes Al3+ compartmentalization via H+ transport and ion gradients in Malus hupehensis
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Volume/sequential designation Plant Physiology, 193(1), p.821-839, 2023
520 3# - SUMMARY, ETC.
Summary, etc. Soil acidification in apple (Malus domestica)orchards results in the release of rhizotoxic aluminum ions (Al3+)into soil. Melatonin (MT)participates in plant responses to abiotic stress; however, its role in AlCl3 stress in apple remains unknown. In this study, root application of MT (1 ?M)substantially alleviated AlCl3 stress (300 ?M)in Pingyi Tiancha (Malus hupehensis), which was reflected by higher fresh and dry weight, increased photosynthetic capacity, and longer and more roots compared with plants that did not receive MT treatment. MT functioned mainly by regulating vacuolar H+/Al3+ exchange and maintaining H+ homeostasis in the cytoplasm under AlCl3 stress. Transcriptome deep sequencing analysis identified the transcription factor gene SENSITIVE TO PROTON RHIZOTOXICITY 1 (MdSTOP1)was induced by both AlCl3 and MT treatments. Overexpressing MdSTOP1 in apple increased AlCl3 tolerance by enhancing vacuolar H+/Al3+ exchange and H+ efflux to the apoplast. We identified 2 transporter genes, ALUMINUM SENSITIVE 3 (MdALS3)and SODIUM HYDROGEN EXCHANGER 2 (MdNHX2), as downstream targets of MdSTOP1. MdSTOP1 interacted with the transcription factor NAM ATAF and CUC 2 (MdNAC2)to induce MdALS3 expression, which reduced Al toxicity by transferring Al3+ from the cytoplasm to the vacuole. Furthermore, MdSTOP1 and MdNAC2 coregulated MdNHX2 expression to increase H+ efflux from the vacuole to the cytoplasm to promote Al3+ compartmentalization and maintain cation balance in the vacuole. Taken together, our findings reveal an MT-STOP1 + NAC2-NHX2/ALS3-vacuolar H+/Al3+ exchange model for the alleviation of AlCl3 stress in apple, laying a foundation for practical applications of MT in agriculture.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Wang, C.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Bian, C.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Li, J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Han, L.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Guo, D.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Wang, T.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Zheng, X.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1Ylwf7zUZWqaBY6HHO9e1MQDwfU-gTGKW/view?usp=drivesdk">https://drive.google.com/file/d/1Ylwf7zUZWqaBY6HHO9e1MQDwfU-gTGKW/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-20348 25.06.2025 25.06.2025 Documentos solicitados