The enigma of environmental pH sensing in plants

Nature

The enigma of environmental pH sensing in plants"


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Environmental pH is a critical parameter for innumerable chemical reactions, myriad biological processes and all forms of life. The mechanisms that underlie the perception of external pH


(pHe) have been elucidated in detail for bacteria, fungi and mammalian cells; however, little information is available on whether and, if so, how pHe is perceived by plants. This is


particularly surprising since hydrogen ion activity of the substrate is of paramount significance for plants, governing the availability of mineral nutrients, the structure of the soil


microbiome and the composition of natural plant communities. Rapid changes in soil pH require constant readjustment of nutrient acquisition strategies, which is associated with dynamic


alterations in gene expression. Referring to observations made in diverse experimental set-ups that unambiguously show that pHe per se affects gene expression, we hypothesize that sensing of


pHe in plants is mandatory to prioritize responses to various simultaneously received environmental cues.


Research in the Schmidt Laboratory is funded by Academia Sinica and the Ministry of Science and Technology (MOST).


Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan


Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan


Genome and Systems Biology Degree Program, College of Life Science, National Taiwan University, Taipei, Taiwan


H.-H.T. conducted research that led to the hypothesis put forward in the manuscript, composed the figures and contributed to the writing. W.S. initiated the research and wrote the paper.


Peer review information Nature Plants thanks the anonymous reviewers for their contribution to the peer review of this work.


Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.


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