Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan.
Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan.
Nat Plants. 2021 Feb;7(2):106-115. doi: 10.1038/s41477-020-00831-8. Epub 2021 Feb 8.
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 (pH) have been elucidated in detail for bacteria, fungi and mammalian cells; however, little information is available on whether and, if so, how pH 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 pH per se affects gene expression, we hypothesize that sensing of pH in plants is mandatory to prioritize responses to various simultaneously received environmental cues.
环境 pH 值是无数化学反应、无数生物过程和所有生命形式的关键参数。细菌、真菌和哺乳动物细胞中外部 pH 值（pH 值）感知的机制已经被详细阐明；然而，关于植物是否以及如何感知 pH 值，以及如果是，其机制如何，目前几乎没有信息。这尤其令人惊讶，因为底物的氢离子活度对植物至关重要，它控制着矿物质养分的可用性、土壤微生物组的结构和自然植物群落的组成。土壤 pH 值的快速变化需要不断调整养分获取策略，这与基因表达的动态变化有关。参考在各种明确表明 pH 值本身会影响基因表达的实验设置中所做的观察，我们假设植物中 pH 值的感知对于优先响应各种同时接收到的环境信号是必需的。
