College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, 471023, PR China.
College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, 471023, PR China; Henan International Joint Laboratory of Stress Resistance Regulation and Safe Production of Protected Vegetables, Luoyang, 471023, PR China; Henan Engineering Technology Research Center for Horticultural Crop Safety and Disease Control, Luoyang, 471023, PR China.
Plant Physiol Biochem. 2023 Aug;201:107835. doi: 10.1016/j.plaphy.2023.107835. Epub 2023 Jun 16.
Due to unprecedented climate change, rapid industrialization and increasing use of agrochemicals, abiotic stress, such as drought, low temperature, high salinity and heavy metal pollution, has become an increasingly serious problem in global agriculture. Anthocyanins, an important plant pigment, are synthesized through the phenylpropanoid pathway and have a variety of physiological and ecological functions, providing multifunctional and effective protection for plants under stress. Foliar anthocyanin accumulation often occurs under abiotic stress including high light, cold, drought, salinity, nutrient deficiency and heavy metal stress, causing leaf reddening or purpling in many plant species. Anthocyanins are used as sunscreens and antioxidants to scavenge reactive oxygen species (ROS), as metal(loid) chelators to mitigate heavy metal stress, and as crucial molecules with a role in delaying leaf senescence. In addition to environmental factors, anthocyanin synthesis is affected by various endogenous factors. Plant hormones such as abscisic acid, jasmonic acid, ethylene and gibberellin have been shown to be involved in regulating anthocyanin synthesis either positively or negatively. Particularly when plants are under abiotic stress, several plant hormones can induce foliar anthocyanin synthesis to enhance plant stress resistance. In this review, we revisit the role of plant hormones in anthocyanin biosynthesis and the mechanism of plant hormone-mediated anthocyanin accumulation and abiotic stress tolerance. We conclude that enhancing anthocyanin content with plant hormones could be a prospective management strategy for improving plant stress resistance, but extensive further research is essentially needed to provide future guidance for practical crop production.
由于前所未有的气候变化、快速工业化和农用化学品使用的增加，非生物胁迫，如干旱、低温、高盐和重金属污染，已成为全球农业日益严重的问题。花色素苷是一种重要的植物色素，通过苯丙烷途径合成，具有多种生理和生态功能，为植物在胁迫下提供多功能和有效的保护。花色素苷在非生物胁迫下（如高光、低温、干旱、盐胁迫、养分缺乏和重金属胁迫）常常会积累，导致许多植物物种的叶片变红或变紫。花色素苷作为防晒霜和抗氧化剂，可以清除活性氧（ROS），作为金属（类）螯合剂来减轻重金属胁迫，并作为延迟叶片衰老的关键分子发挥作用。除了环境因素外，花色素苷的合成还受到各种内源性因素的影响。植物激素如脱落酸、茉莉酸、乙烯和赤霉素已被证明或正向或负向参与调节花色素苷的合成。特别是当植物受到非生物胁迫时，几种植物激素可以诱导叶片花色素苷的合成，从而增强植物的抗胁迫能力。在这篇综述中，我们重新审视了植物激素在花色素苷生物合成中的作用以及植物激素介导的花色素苷积累和非生物胁迫耐受性的机制。我们的结论是，通过植物激素来提高花色素苷的含量可能是提高植物抗胁迫能力的一种有前景的管理策略，但还需要进行广泛的进一步研究，为实际作物生产提供未来的指导。
