Institut Agro, Univ Angers, INRAE, IRHS, SFR QuaSaV, 49000 Angers, France.
BCF Life Sciences, Boisel, 56140 Pleucadeuc, France.
Int J Mol Sci. 2023 Jun 3;24(11):9714. doi: 10.3390/ijms24119714.
Over the past decade, plant biostimulants have been increasingly used in agriculture as environment-friendly tools that improve the sustainability and resilience of crop production systems under environmental stresses. Protein hydrolysates (PHs) are a main category of biostimulants produced by chemical or enzymatic hydrolysis of proteins from animal or plant sources. Mostly composed of amino acids and peptides, PHs have a beneficial effect on multiple physiological processes, including photosynthetic activity, nutrient assimilation and translocation, and also quality parameters. They also seem to have hormone-like activities. Moreover, PHs enhance tolerance to abiotic stresses, notably through the stimulation of protective processes such as cell antioxidant activity and osmotic adjustment. Knowledge on their mode of action, however, is still piecemeal. The aims of this review are as follows: (i) Giving a comprehensive overview of current findings about the hypothetical mechanisms of action of PHs; (ii) Emphasizing the knowledge gaps that deserve to be urgently addressed with a view to efficiently improve the benefits of biostimulants for different plant crops in the context of climate change.
在过去的十年中，植物生物刺激素作为环保工具，在环境胁迫下提高作物生产系统的可持续性和弹性，在农业中的应用越来越广泛。蛋白水解物（PHs）是通过动物或植物来源的蛋白质的化学或酶水解产生的生物刺激物的主要类别。PHs 主要由氨基酸和肽组成，对包括光合作用、养分吸收和转运以及品质参数在内的多种生理过程具有有益的影响。它们似乎还具有激素样的活性。此外，PHs 通过刺激细胞抗氧化活性和渗透调节等保护过程来增强对非生物胁迫的耐受性。然而，关于它们的作用机制的知识仍然零散。本文的目的如下：（i）全面概述 PHs 的假设作用机制的现有研究结果；（ii）强调值得迫切解决的知识差距，以期在气候变化背景下，有效地提高生物刺激素对不同植物作物的益处。
