extracellular ph sensing by plant cell-surface peptide-receptor complexes plants - exuviance-wrinkle-smooth-topical-peptide-reviews peptides Unraveling Extracellular pH Sensing by Plant Cell-Surface Peptide-Receptor Complexes

extreme-peptides-clenbuterol Plants, as sessile organisms, have evolved sophisticated mechanisms to perceive and respond to their environment. Among these, sensing fluctuations in extracellular pH is crucial for regulating a myriad of physiological processes, from growth and development to stress responses and immunity. Emerging research has shed light on a fascinating plant cell-surface peptide-receptor complex system that functions as a direct sensor of these vital extracellular pH changes作者：H Guo—Extracellular pH sensing by plant cell-surface peptide-receptor complexes. Cell 185: 3341–3355. Huang, W., Hu, N., Xiao, Z., Qiu, Y., Yang .... This intricate sensing mechanism, primarily involving peptides and their cognate receptors, plays a pivotal role in mediating how plant cells interpret and react to their immediate surroundings.

At the forefront of this discovery is the identification of specific peptide ligands and their corresponding receptor complexes. For instance, the receptors for plant small peptides, such as RGF1 and Pep1, are now understood to be involved in extracellular pH sensing作者：L Liu·2022·被引用次数：124—Here, we report thatplant cell-surface peptide-receptor complexescan function asextracellular pHsensors.. These peptide signals are short chains of amino acids that, upon binding to their cell surface receptors, initiate downstream signaling cascades. The prevailing understanding is that these peptide-receptor complexes act as extracellular pH sensors, directly translating the extracellular pH environment into cellular responses基因组生物学及其未来发展论坛（网络报告）：Extracellular pH .... This is a significant advancement, moving beyond the understanding that plants use various strategies and signaling molecules, including peptides, to sense their surroundings.

The mechanism by which these plant cell-surface peptide-receptor complexes can function as extracellular pH sensors is particularly noteworthy.0000-0002-9322-2272 - Xing Wen Research indicates that changes in extracellular pH, whether becoming more acidic or alkaline, directly influence the perception and signaling of these peptide-receptor complexes. Specifically, an alkalization of the extracellular pH has been observed to attenuate signals that are dependent on a relatively acidic extracellular pH. Conversely, acidic extracellular pH conditions can also trigger specific responses. This dynamic interplay ensures that the plant can fine-tune its responses based on the prevailing pH of its environment. The extracellular pH is a critical physiological parameter, and its tight regulation is essential for normal plant function. Indeed, many physiological and environmental factors can induce changes in extracellular pH作者：H Han·2023·被引用次数：3—Extracellular pH sensing by plant cell-surface peptide-receptor complexes... pH biosensing in the plant apoplast-a focus on root cell elongation..

A prime example of this sensing mechanism is seen in the root apexIdentification of extracellular networks of leucine-rich .... The root apoplast, the region between the plasma membrane and the cell wall, is directly exposed to the soil pH. Studies have revealed that Arabidopsis employs a bipartite peptide-receptor mechanism to sense both acidic and alkaline pH in the root apoplast. This sensing capability is crucial for proper root development and elongation. The acidic extracellular pH in the root apoplast (around pH 5.7 for Arabidopsis) can be influenced by various factors, including metabolic activity and external environmental conditions.

Furthermore, the involvement of specific receptor types, such as RGF1-RGFR and Pep1-PEPR function as pH sensors, highlights the specificity of this systemDept of Chemistry. These complexes act as molecular switches, their activity modulated by the external pH. The RGF1-RGFR and Pep1-PEPR complexes are a testament to how cell surface receptors can evolve to perceive a range of environmental cues, including pH. This finding is further supported by research demonstrating that extracellular pH sensing by plant cell-surface peptide-receptor complexes is a fundamental aspect of plant physiology, influencing processes like meristem growth. An increase in pH, for example, can destabilize these complexes, leading to the cessation of meristem growth and a shift towards other prioritized processes. This underscores the critical role of regulated extracellular acidity and alkalinity in controlling plant development作者：L Liu·被引用次数：123—研究人员报告了植物细胞表面的肽-受体复合物可以作为细胞外pH值的传感器发挥作用。研究人员发现，模式触发免疫（PTI）使根尖分生组织（RAM）区域的酸性细胞外pH....

The implications of this pH sensing extend to plant immunity as wellpH regulates peptide–receptor perception: Trends in Plant .... Understanding how extracellular pH influences plant-pathogen interactions and ambient pH dynamics is an active area of research. PM H+-ATPases, for instance, play a key role in regulating intracellular and extracellular pH homeostasis and are involved in cell physiology and plant immunity. The ability of plant cells to accurately sense extracellular pH near the plasma membrane is critical for mounting appropriate defense responses. The apoplast is not just a structural component but a dynamic microenvironment where sensing and signaling occur.

In summary, the discovery of extracellular pH sensing by plant cell-surface peptide-receptor complexes represents a paradigm shift in our understanding of how plants interact with their environment.作者：HN Diaz-Ardila·2025·被引用次数：1—The ratiometric sensor PM-Apo-acidin4 permits noninvasivepHe monitoring near the plasma membrane, whereplantcells sensepHe conditions ( ... The intricate interplay between peptides, receptors, and extracellular pH forms a sophisticated sensory apparatus that governs a wide range of essential plant processes.作者：Z Li·2025·被引用次数：14—PM H+-ATPases regulate intracellular andextracellular pHhomeostasis and play key roles incellphysiology andplantimmunity (Falhof et al. This research deepens our knowledge of plant cell signaling and opens new avenues for exploring crop improvement and disease resistance. The ability of these complexes to respond to acidic and alkaline conditions provides a robust system for plant survival and adaptation. This comprehensive understanding of peptide perception and its pH dependence is crucial for future advancements in plant science.