ZmWRKY104 Transcription Factor Phosphorylated by ZmMPK6 Functioning in ABA-Induced Antioxidant Defense and Enhance Drought Tolerance in Maize

Mitogen-activated protein kinase (MAPK) cascades are primary signaling pathways involved in various signaling pathways triggered by abiotic and biotic stresses in plants. The downstream substrate proteins of MAPKs in maize, however, are still limited. Here, we screened a WRKY IIa transcription facto...

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Published inBiology (Basel, Switzerland) Vol. 10; no. 9; p. 893
Main Authors Zhao, Lili, Yan, Jingwei, Xiang, Yang, Sun, Yue, Zhang, Aying
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 10.09.2021
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Abstract Mitogen-activated protein kinase (MAPK) cascades are primary signaling pathways involved in various signaling pathways triggered by abiotic and biotic stresses in plants. The downstream substrate proteins of MAPKs in maize, however, are still limited. Here, we screened a WRKY IIa transcription factor (TF) in maize (Zeamays L.), ZmWRKY104, and found that it is a substrate of ZmMPK6. ZmWRKY104 physically interacts with ZmMPK6 in vitro and in vivo. Liquid chromatography–tandem mass spectrometry (LC-MS/MS) analysis results showed that threonine-59 (Thr-59, T59) was the major phosphorylation site of ZmWRKY104 by ZmMPK6. Subcellular localization analysis suggested that ZmWRKY104 acts in the nucleus and that ZmMPK6 acts in the nucleus and cytoplasmic membrane in the cytosol. Functional analysis revealed that the role of ZmWRKY104 in ABA-induced antioxidant defense depends on ZmMPK6. Moreover, overexpression of ZmWRKY104 in maize can enhance drought tolerance and relieve drought-induced oxidative damage in transgenic lines. The above results help define the mechanism of the function of ZmWRKY104 phosphorylated by ZmMPK6 in ABA-induced antioxidant defense and drought tolerance in maize.
AbstractList Mitogen-activated protein kinase (MAPK) cascades are primary signaling pathways involved in various signaling pathways triggered by abiotic and biotic stresses in plants. The downstream substrate proteins of MAPKs in maize, however, are still limited. Here, we screened a WRKY IIa transcription factor (TF) in maize (Zeamays L.), ZmWRKY104, and found that it is a substrate of ZmMPK6. ZmWRKY104 physically interacts with ZmMPK6 in vitro and in vivo. Liquid chromatography–tandem mass spectrometry (LC-MS/MS) analysis results showed that threonine-59 (Thr-59, T59) was the major phosphorylation site of ZmWRKY104 by ZmMPK6. Subcellular localization analysis suggested that ZmWRKY104 acts in the nucleus and that ZmMPK6 acts in the nucleus and cytoplasmic membrane in the cytosol. Functional analysis revealed that the role of ZmWRKY104 in ABA-induced antioxidant defense depends on ZmMPK6. Moreover, overexpression of ZmWRKY104 in maize can enhance drought tolerance and relieve drought-induced oxidative damage in transgenic lines. The above results help define the mechanism of the function of ZmWRKY104 phosphorylated by ZmMPK6 in ABA-induced antioxidant defense and drought tolerance in maize.
Simple SummaryCurrent knowledge about the downstream substrate proteins of MAPKs is still limited. Our study screened a new WRKY IIa transcription factor as the substrate protein of ZmMPK6, and its phosphorylation at Thr-59 is critical to the role of ZmWRKY104 in ABA-induced antioxidant defense. Moreover, overexpression ZmWRKY104 in maize enhances the drought tolerance of transgenic plants. These findings define a mechanism for the function of ZmWRKY104 phosphorylated by ZmMPK6 in ABA-induced antioxidant defense and drought tolerance.AbstractMitogen-activated protein kinase (MAPK) cascades are primary signaling pathways involved in various signaling pathways triggered by abiotic and biotic stresses in plants. The downstream substrate proteins of MAPKs in maize, however, are still limited. Here, we screened a WRKY IIa transcription factor (TF) in maize (Zea mays L.), ZmWRKY104, and found that it is a substrate of ZmMPK6. ZmWRKY104 physically interacts with ZmMPK6 in vitro and in vivo. Liquid chromatography–tandem mass spectrometry (LC-MS/MS) analysis results showed that threonine-59 (Thr-59, T59) was the major phosphorylation site of ZmWRKY104 by ZmMPK6. Subcellular localization analysis suggested that ZmWRKY104 acts in the nucleus and that ZmMPK6 acts in the nucleus and cytoplasmic membrane in the cytosol. Functional analysis revealed that the role of ZmWRKY104 in ABA-induced antioxidant defense depends on ZmMPK6. Moreover, overexpression of ZmWRKY104 in maize can enhance drought tolerance and relieve drought-induced oxidative damage in transgenic lines. The above results help define the mechanism of the function of ZmWRKY104 phosphorylated by ZmMPK6 in ABA-induced antioxidant defense and drought tolerance in maize.
Author Zhang, Aying
Sun, Yue
Zhao, Lili
Yan, Jingwei
Xiang, Yang
AuthorAffiliation 1 College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; 2016216025@njau.edu.cn (L.Z.); jingweiyan@njau.edu.cn (J.Y.); 2017216005@njau.edu.cn (Y.X.); sunyueacer@163.com (Y.S.)
2 State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
AuthorAffiliation_xml – name: 2 State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
– name: 1 College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; 2016216025@njau.edu.cn (L.Z.); jingweiyan@njau.edu.cn (J.Y.); 2017216005@njau.edu.cn (Y.X.); sunyueacer@163.com (Y.S.)
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SSID ssj0000702636
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Snippet Mitogen-activated protein kinase (MAPK) cascades are primary signaling pathways involved in various signaling pathways triggered by abiotic and biotic stresses...
Simple SummaryCurrent knowledge about the downstream substrate proteins of MAPKs is still limited. Our study screened a new WRKY IIa transcription factor as...
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proquest
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StartPage 893
SubjectTerms Abiotic stress
Abscisic acid
abscisic acid (ABA)
Amino acids
antioxidant defense
Antioxidants
Corn
Cytoplasmic membranes
Cytosol
Drought resistance
drought stress
Enzymes
Gene expression
Kinases
Liquid chromatography
Localization
MAP kinase
Mass spectroscopy
mitogen-activated protein kinase (MAPK)
Phosphorylation
Phylogenetics
Plant growth
Polypeptides
Protein kinase
Proteins
Salinity
Signal transduction
Threonine
Tobacco
Transgenic plants
Vitamin E
WRKY transcription factor
Zea mays
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Title ZmWRKY104 Transcription Factor Phosphorylated by ZmMPK6 Functioning in ABA-Induced Antioxidant Defense and Enhance Drought Tolerance in Maize
URI https://www.proquest.com/docview/2576382862/abstract/
https://search.proquest.com/docview/2577460181
https://pubmed.ncbi.nlm.nih.gov/PMC8467104
https://doaj.org/article/5fd72ce06ffe44858906cfbacef30587
Volume 10
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