Key message

Plant bioregulators play an important role in managing oxidative stress tolerance in plants. Utilizing their ability in stress sensitive crops through genetic engineering will be a meaningful approach to manage food production under the threat of climate change.

Abstract

Exploitation of the plant defense system against oxidative stress to engineer tolerant plants in the climate change scenario is a sustainable and meaningful strategy. Plant bioregulators (PBRs), which are important biotic factors, are known to play a vital role not only in the development of plants, but also in inducing tolerance in plants against various environmental extremes. These bioregulators include auxins, gibberellins, cytokinins, abscisic acid, brassinosteroids, polyamines, strigolactones, and ascorbic acid and provide protection against the oxidative stress-associated reactive oxygen species through modulation or activation of a plant’s antioxidant system. Therefore, exploitation of their functioning and accumulation is of considerable significance for the development of plants more tolerant of harsh environmental conditions in order to tackle the issue of food security under the threat of climate change. Therefore, this review summarizes a new line of evidence that how PBRs act as inducers of oxidative stress resistance in plants and how they could be modulated in transgenic crops via introgression of genes. Reactive oxygen species production during oxidative stress events and their neutralization through an efficient antioxidants system is comprehensively detailed. Further, the use of exogenously applied PBRs in the induction of oxidative stress resistance is discussed. Recent advances in engineering transgenic plants with modified PBR gene expression to exploit the plant defense system against oxidative stress are discussed from an agricultural perspective.

中文翻译：

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生物调节剂：释放它们在植物氧化防御系统调节中的潜在作用

关键信息

植物生物调节剂在管理植物的氧化应激耐受性方面发挥着重要作用。通过基因工程利用它们在压力敏感作物中的能力将是在气候变化威胁下管理粮食生产的一种有意义的方法。

抽象的

在气候变化情景中利用植物防御系统对抗氧化应激来设计耐受植物是一种可持续且有意义的策略。植物生物调节剂 (PBR) 是重要的生物因子，众所周知，它不仅在植物的发育中发挥着至关重要的作用，而且在诱导植物对各种极端环境的耐受性方面也发挥着重要作用。这些生物调节剂包括生长素、赤霉素、细胞分裂素、脱落酸、油菜素内酯、多胺、独脚金内酯和抗坏血酸，并通过调节或激活植物的抗氧化系统来提供针对与氧化应激相关的活性氧的保护。所以，开发它们的功能和积累对于培育更能耐受恶劣环境条件的植物以解决气候变化威胁下的粮食安全问题具有重要意义。因此，本综述总结了一条新的证据，即 PBR 如何作为植物抗氧化应激的诱导剂，以及它们如何通过基因渗入在转基因作物中进行调节。全面详细地介绍了氧化应激事件期间活性氧的产生及其通过有效的抗氧化剂系统中和的过程。此外，还讨论了外源应用 PBR 在诱导氧化应激抗性中的应用。