AtPIP1;4 and AtPIP2;4 Cooperatively Mediate H2O2 Transport to Regulate Plant Growth and Disease Resistance

The rapid production of hydrogen peroxide (H2O2) is a hallmark of plants’ successful recognition of pathogen infection and plays a crucial role in innate immune signaling. Aquaporins (AQPs) are membrane channels that facilitate the transport of small molecular compounds across cell membranes. In pla...

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Bibliographic Details
Published in:Plants (Basel) 2024-04, Vol.13 (7), p.1018
Main Authors: Yao, Xiaohui, Mu, Yanjie, Zhang, Liyuan, Chen, Lei, Zou, Shenshen, Chen, Xiaochen, Lu, Kai, Dong, Hansong
Format: Article
Language:English
Subjects:
Apoplast
aquaporin
Aquaporins
Arabidopsis
Biological activity
callose
Cell membranes
Cytoplasm
Disease resistance
Gene expression
H2O2 transport
Hydrogen peroxide
Hydrogen production
Immunity
Leaves
Membrane channels
Membrane proteins
Membranes
Pathogens
Plant cells
Plant diseases
Plant growth
plasma membrane
Proteins
Translocation
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Summary:The rapid production of hydrogen peroxide (H2O2) is a hallmark of plants’ successful recognition of pathogen infection and plays a crucial role in innate immune signaling. Aquaporins (AQPs) are membrane channels that facilitate the transport of small molecular compounds across cell membranes. In plants, AQPs from the plasma membrane intrinsic protein (PIP) family are utilized for the transport of H2O2, thereby regulating various biological processes. Plants contain two PIP families, PIP1s and PIP2s. However, the specific functions and relationships between these subfamilies in plant growth and immunity remain largely unknown. In this study, we explore the synergistic role of AtPIP1;4 and AtPIP2;4 in regulating plant growth and disease resistance in Arabidopsis. We found that in plant cells treated with H2O2, AtPIP1;4 and AtPIP2;4 act as facilitators of H2O2 across membranes and the translocation of externally applied H2O2 from the apoplast to the cytoplasm. Moreover, AtPIP1;4 and AtPIP2;4 collaborate to transport bacterial pathogens and flg22-induced apoplastic H2O2 into the cytoplasm, leading to increased callose deposition and enhanced defense gene expression to strengthen immunity. These findings suggest that AtPIP1;4 and AtPIP2;4 cooperatively mediate H2O2 transport to regulate plant growth and immunity.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants13071018