Chen Qianying, Ou Zulan, Lv Huifang
College of Biological and Food Engineering, Hefei Normal University, Hefei, Anhui 230001, China.
Ecotoxicol Environ Saf. 2024 Dec;288:117364. doi: 10.1016/j.ecoenv.2024.117364. Epub 2024 Nov 22.
Cadmium (Cd) is a toxic heavy metal that interferes with essential metabolic pathways crucial for plant growth, often resulting in toxicity and plant death. Blueberry plants exhibit metabolic adaptations to mitigate the stress caused by elevated Cd levels. In this review, we highlighted the effects of Cd-induced stress on blueberry plants and explored the potential alleviating effects of arbuscular mycorrhizal fungi (AMF). Cd uptake disrupts plant metabolism and impacts primary and secondary metabolites, including anthocyanins, which play a role in defense mechanisms against pathogens. Hence, Cd-induced stress alters anthocyanin levels in blueberry leaves, negatively affecting antioxidant defense mechanisms and hindering growth. Conversely, AMF establishes a symbiotic relationship with blueberry plants, promoting nutrient absorption and enhancing stress tolerance. Understanding the association between Cd stress, anthocyanin responses in blueberries, and AMF-mediated mitigation is crucial for developing integrated strategies to enhance blueberry plant health and improve quality. Employing AMF to remediate metal-related stress represents a significant breakthrough for sustainable crop production in a Cd-contaminated environment.
镉（Cd）是一种有毒重金属，会干扰对植物生长至关重要的基本代谢途径，常常导致毒性反应和植物死亡。蓝莓植株会表现出代谢适应性，以减轻镉含量升高所造成的压力。在本综述中，我们着重介绍了镉诱导的胁迫对蓝莓植株的影响，并探讨了丛枝菌根真菌（AMF）的潜在缓解作用。镉的吸收会扰乱植物代谢，并影响初级和次级代谢产物，包括花青素，而花青素在抵御病原体的防御机制中发挥作用。因此，镉诱导的胁迫会改变蓝莓叶片中的花青素水平，对抗氧化防御机制产生负面影响并阻碍生长。相反，AMF与蓝莓植株建立共生关系，促进养分吸收并增强胁迫耐受性。了解镉胁迫、蓝莓中花青素反应以及AMF介导的缓解作用之间的关联，对于制定增强蓝莓植株健康和提高品质的综合策略至关重要。利用AMF修复与金属相关的胁迫，是镉污染环境中可持续作物生产的一项重大突破。
