Paniz Fernanda Pollo, Pedron Tatiana, Procópio Vitória Aparecida, Lange Camila Neves, Freire Bruna Moreira, Batista Bruno Lemos
Center for Natural and Human Sciences, Federal University of ABC, Santo André 09210-580, SP, Brazil.
Toxics. 2023 Apr 11;11(4):362. doi: 10.3390/toxics11040362.
Arsenic (As) and Cadmium (Cd) are toxic to rice plants. However, selenium (Se) has the potential to regulate As and Cd toxicity. The present study aimed to evaluate the co-exposure to As and Se species in two rice cultivars, BRS Pampa and EPAGRI 108. The plants were divided into six groups and cultivated until complete maturation of the grains, under greenhouse conditions. Regarding total As and inorganic As (i-As) accumulation in grains, the highest concentrations were found for BRS Pampa. For Se, EPAGRI 108 presented the highest concentration of inorganic and organic Se (i-Se and o-Se). The exposure assessments showed that Se biofortification can mitigate the As accumulation in rice and, consequently, the risk of As and Cd toxicity in grains for human consumption. The combined effect of As and Se in rice plants could represent an alternative to biofortify this food in a safe way and with a higher percentage of bioavailable Se. Although Se is able to mitigate As toxicity in rice plants, in the present study we showed that co-exposure in different cultivars under the same growing conditions may present different responses to As and Se exposure.
砷（As）和镉（Cd）对水稻植株有毒害作用。然而，硒（Se）具有调节砷和镉毒性的潜力。本研究旨在评估两个水稻品种BRS Pampa和EPAGRI 108对砷和硒物种的共同暴露情况。将这些植株分为六组，在温室条件下培养至谷物完全成熟。关于谷物中总砷和无机砷（i-As）的积累，BRS Pampa的浓度最高。对于硒，EPAGRI 108的无机硒和有机硒（i-Se和o-Se）浓度最高。暴露评估表明，硒生物强化可以减轻水稻中砷的积累，从而降低人类食用谷物时砷和镉毒性的风险。水稻植株中砷和硒的联合作用可能是一种以安全方式对这种食物进行生物强化并提高生物可利用硒百分比的替代方法。尽管硒能够减轻水稻植株中的砷毒性，但在本研究中我们表明，在相同生长条件下不同品种的共同暴露可能对砷和硒暴露呈现不同的反应。
