Perez Veronica C, Zhao Haohao, Lin Makou, Kim Jeongim
Plant Molecular and Cellular Biology, University of Florida, Gainesville, FL 32611, USA.
Horticultural Sciences Department, University of Florida, Gainesville, FL 32611, USA.
Plants (Basel). 2023 Jan 6;12(2):266. doi: 10.3390/plants12020266.
Auxins are a class of plant hormones playing crucial roles in a plant's growth, development, and stress responses. Phenylacetic acid (PAA) is a phenylalanine-derived natural auxin found widely in plants. Although the auxin activity of PAA in plants was identified several decades ago, PAA homeostasis and its function remain poorly understood, whereas indole-3-acetic acid (IAA), the most potent auxin, has been used for most auxin studies. Recent studies have revealed unique features of PAA distinctive from IAA, and the enzymes and intermediates of the PAA biosynthesis pathway have been identified. Here, we summarize the occurrence and function of PAA in plants and highlight the recent progress made in PAA homeostasis, emphasizing PAA biosynthesis and crosstalk between IAA and PAA homeostasis.
生长素是一类在植物生长、发育和应激反应中发挥关键作用的植物激素。苯乙酸（PAA）是一种源自苯丙氨酸的天然生长素，广泛存在于植物中。尽管几十年前就已确定PAA在植物中的生长素活性，但其稳态及其功能仍知之甚少，而最有效的生长素吲哚 - 3 - 乙酸（IAA）已被用于大多数生长素研究。最近的研究揭示了PAA与IAA不同的独特特征，并且已经确定了PAA生物合成途径的酶和中间体。在这里，我们总结了PAA在植物中的存在和功能，并强调了PAA稳态方面的最新进展，重点是PAA生物合成以及IAA和PAA稳态之间的相互作用。
