Fortes Ana Margarida, Agudelo-Romero Patricia, Pimentel Diana, Alkan Noam
Faculdade de Ciências de Lisboa, Department of Plant Biology, Biosystems and Integrative Sciences Institute, Universidade de Lisboa, Lisbon, Portugal.
School of Molecular Science, The University of Western Australia, Perth, WA, Australia.
Front Plant Sci. 2019 Jul 2;10:816. doi: 10.3389/fpls.2019.00816. eCollection 2019.
Polyamines are growth regulators that have been widely implicated in abiotic and biotic stresses. They are also associated with fruit set, ripening, and regulation of fruit quality-related traits. Modulation of their content confers fruit resilience, with polyamine application generally inhibiting postharvest decay. Changes in the content of free and conjugated polyamines in response to stress are highly dependent on the type of abiotic stress applied or the lifestyle of the pathogen. Recent studies suggest that exogenous application of polyamines or modulation of polyamine content by gene editing can confer tolerance to multiple abiotic and biotic stresses simultaneously. In this review, we explore data on polyamine synthesis and catabolism in fruit related to pre- and postharvest stresses. Studies of mutant plants, priming of stress responses, and treatments with polyamines and polyamine inhibitors indicate that these growth regulators can be manipulated to increase fruit productivity with reduced use of pesticides and therefore, under more sustainable conditions.
多胺是一类生长调节剂，已被广泛认为与非生物胁迫和生物胁迫有关。它们还与坐果、果实成熟以及果实品质相关性状的调控有关。其含量的调节赋予果实抗性，施用多胺通常可抑制采后腐烂。游离态和结合态多胺含量对应激的变化高度依赖于所施加的非生物胁迫类型或病原体的生活方式。最近的研究表明，外源施用多胺或通过基因编辑调节多胺含量可同时赋予对多种非生物和生物胁迫的耐受性。在本综述中，我们探讨了与采前和采后胁迫相关的果实中多胺合成和分解代谢的数据。对突变植物、胁迫反应引发以及用多胺和多胺抑制剂处理的研究表明，这些生长调节剂可以通过减少农药使用来加以调控，从而提高果实产量，进而在更可持续的条件下实现这一目标。
