Impacts of Microcystins on Morphological and Physiological Parameters of Agricultural Plants: A Review.
Impacts of Microcystins on Morphological and Physiological Parameters of Agricultural Plants: A Review.
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DOI：
10.3390/plants10040639
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发表时间：
2021-03-28
期刊：
影响因子：
--
通讯作者：
Vasconcelos V
中科院分区：
文献类型：
--
作者：
Campos A;Redouane EM;Freitas M;Amaral S;Azevedo T;Loss L;Máthé C;Mohamed ZA;Oudra B;Vasconcelos V
蓝藻是一类具有光合作用的原核生物，在水环境中与野生生物和人类的污染和中毒有关。一些种类的蓝藻产生有效的毒素，如微囊藻毒素（MC），这是非常积极的几种生物，包括动物和人类。为了保护人类健康，防止人类接触这类生物和毒素，大多数国家都制定了饮用水中MCs的管理限值。在这方面，世界卫生组织（世卫组织）建议1 µg MCs/L为饮用水中的最高可接受浓度。然而，没有对用于其他应用/活动的沃茨规定管制限度，对环境和人类健康构成潜在威胁。事实上，被微囊藻毒素或其他蓝藻毒素污染的水经常用于农业、作物和粮食生产。已报道了MCs在植物中的几种有害效应，包括生长减少、组织坏死、光合作用抑制和代谢变化，导致作物生产力受损和经济损失。研究还表明，MCs在可食用组织和植物器官中有显著积累，这引起了与食品安全相关的担忧。这项工作的目的是系统化和分析以前的科学研究所产生的信息，即植物毒性和MC的影响，特别是对农业植物的生长，光合作用和生产力。在这项工作中，详细概述了农艺学感兴趣的形态和生理参数，目的是评估田间条件下MC的假定影响。最后，浓度依赖性的影响突出，因为这些可以帮助在未来的灌溉沃茨的指导方针，并建立监管限制MC。
Cyanobacteria are a group of photosynthetic prokaryotes that pose a great concern in the aquatic environments related to contamination and poisoning of wild life and humans. Some species of cyanobacteria produce potent toxins such as microcystins (MCs), which are extremely aggressive to several organisms, including animals and humans. In order to protect human health and prevent human exposure to this type of organisms and toxins, regulatory limits for MCs in drinking water have been established in most countries. In this regard, the World Health Organization (WHO) proposed 1 µg MCs/L as the highest acceptable concentration in drinking water. However, regulatory limits were not defined in waters used in other applications/activities, constituting a potential threat to the environment and to human health. Indeed, water contaminated with MCs or other cyanotoxins is recurrently used in agriculture and for crop and food production. Several deleterious effects of MCs including a decrease in growth, tissue necrosis, inhibition of photosynthesis and metabolic changes have been reported in plants leading to the impairment of crop productivity and economic loss. Studies have also revealed significant accumulation of MCs in edible tissues and plant organs, which raise concerns related to food safety. This work aims to systematize and analyze the information generated by previous scientific studies, namely on the phytotoxicity and the impact of MCs especially on growth, photosynthesis and productivity of agricultural plants. Morphological and physiological parameters of agronomic interest are overviewed in detail in this work, with the aim to evaluate the putative impact of MCs under field conditions. Finally, concentration-dependent effects are highlighted, as these can assist in future guidelines for irrigation waters and establish regulatory limits for MCs.
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