An Arabidopsis Glutathione Peroxidase Functions as Both a Redox Transducer and a Scavenger in Abscisic Acid and Drought Stress Responses (Record no. 42603)

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control field 20250625124717.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-8297
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Title An Arabidopsis Glutathione Peroxidase Functions as Both a Redox Transducer and a Scavenger in Abscisic Acid and Drought Stress Responses
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Volume/sequential designation The Plant Cell, 18(19, p.2749-2766, 2006
520 3# - SUMMARY, ETC.
Summary, etc. We isolated two T-DNA insertion mutants of Arabidopsis thaliana GLUTATHIONE PEROXIDASE3 (ATGPX3)that exhibited a higher rate of water loss under drought stress, higher sensitivity to H2O2 treatment during seed germination and seedling development, and enhanced production of H2O2 in guard cells. By contrast, lines engineered to overexpress ATGPX3 were less sensitive to drought stress than the wild type and displayed less transpirational water loss, which resulted in higher leaf surface temperature. The atgpx3 mutation also disrupted abscisic acid (ABA)activation of calcium channels and the expression of ABA- and stress-responsive genes. ATGPX3 physically interacted with the 2C-type protein phosphatase ABA INSENSITIVE2 (ABI2)and, to a lesser extent, with ABI1. In addition, the redox states of both ATGPX3 and ABI2 were found to be regulated by H2O2. The phosphatase activity of ABI2, measured in vitro, was reduced approximately fivefold by the addition of oxidized ATGPX3. The reduced form of ABI2 was converted to the oxidized form by the addition of oxidized ATGPX3 in vitro, which might mediate ABA and oxidative signaling. These results suggest that ATGPX3 might play dual and distinctive roles in H2O2 homeostasis, acting as a general scavenger and specifically relaying the H2O2 signal as an oxidative signal transducer in ABA and drought stress signaling.
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Personal name Miao, Y.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Dong Lv
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Personal name Pengcheng Wang,
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Personal name Xue-Chen Wang,
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Personal name Jia Chen,
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Personal name Chen Miao,
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Chun-Peng Songa
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Uniform Resource Identifier <a href="https://drive.google.com/file/d/1OKxvhB1Wbbc-ySxRAiGFLrK8XoXkm-a6/view?usp=drivesdk">https://drive.google.com/file/d/1OKxvhB1Wbbc-ySxRAiGFLrK8XoXkm-a6/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-8297 25.06.2025 25.06.2025 Documentos solicitados