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中国生物工程杂志

China Biotechnology
China Biotechnology  2022, Vol. 42 Issue (8): 99-108    DOI: 10.13523/j.cb.2204036
    
Recent Progress in the Functional Research of PMEIs
XIONG Yuan,REN Xiang-xiang,ZHU Hui,REN Xin-yi,PAN Zi-yang,SU Tao*()
Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
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Abstract  

The cell wall is a complex and dynamic network structure, playing a vital regulatory role in plant growth and development, stress response, and immune resistance. As the main polysaccharide component in the primary cell wall structure, pectin is composed of homogalacturonic acid (HG), the most abundant linear polymer. The degree of methyl esterification of HG leads to its enzymatic hydrolysis to form a gel, thus affecting the stability of the pectin structure. Depending on post-translational mechanisms, pectin methylesterase inhibitors (PMEIs) regulate the PME activity by fine-tuning the balance of methyl esterification of pectin polysaccharides to maintain cell wall integrity and biomechanical properties. An increasing number of studies have shown that PMEI-PME interaction modulates the homeostasis of pectin methyl esterification, which is a crucial factor determining cell adhesion, cell wall porosity, elasticity, and organ morphogenesis. It is also an associated molecular pattern of cell wall-mediated immune response to environmental cues by releasing the anti-stress signals. This review presents the recent research progress on the physiological importance of PMEIs in regulating plant growth and development, especially regulatory mechanisms underlying the function of the stress tolerance in response to various stress stimuli. Since much remains unknown concerning the in vivo activity and regulatory mechanisms of PMEIs in woody plants, this review provides a theoretical basis and strategic reference for future research.



Key wordsCell wall      Pectin      Pectin methylesterase inhibitor (PMEI)      Homogalacturonic acid      Methyl esterification      Immune defense     
Received: 17 April 2022      Published: 07 September 2022
ZTFLH:  Q71  
Corresponding Authors: Tao SU     E-mail: sutao@njfu.edu.cn
Cite this article:

XIONG Yuan,REN Xiang-xiang,ZHU Hui,REN Xin-yi,PAN Zi-yang,SU Tao. Recent Progress in the Functional Research of PMEIs. China Biotechnology, 2022, 42(8): 99-108.

URL:

https://manu60.magtech.com.cn/biotech/10.13523/j.cb.2204036     OR     https://manu60.magtech.com.cn/biotech/Y2022/V42/I8/99

Fig.1 Schematic model of biosynthesis and subcellular target of PMEI and PME in plants
Fig.2 Schematic representation of the functional involvement of PMEI members in plant-environment interactions
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