Siqueira João Antonio, Wakin Thiago, Batista-Silva Willian, Silva José Cleydson F, Vicente Matheus H, Silva Jéssica C, Clarindo Wellington R, Zsögön Agustin, Peres Lazaro E P, De Veylder Lieven, Fernie Alisdair R, Nunes-Nesi Adriano, Araújo Wagner L
Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil.
National Institute of Science and Technology in Plant-Pest Interactions, Bioagro, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil.
J Hazard Mater. 2022 Jun 15;432:128704. doi: 10.1016/j.jhazmat.2022.128704. Epub 2022 Mar 15.
Aluminium (Al), a limiting factor for crop productivity in acidic soils (pH ≤ 5.5), imposes drastic constraints for food safety in developing countries. The major mechanisms that allow plants to cope with Al involve manipulations of organic acids metabolism and DNA-checkpoints. When assumed individually both approaches have been insufficient to overcome Al toxicity. On analysing the centre of origin of most cultivated plants, we hypothesised that day-length seems to be a pivotal agent modulating Al tolerance across distinct plant species. We observed that with increasing distance from the Equator, Al tolerance decreases, suggesting a relationship with the photoperiod. We verified that long-day (LD) species are generally more Al-sensitive than short-day (SD) species, whereas genetic conversion of tomato for SD growth habit boosts Al tolerance. Reduced Al tolerance correlates with DNA-checkpoint activation under LD. Furthermore, DNA-checkpoint-related genes are under positive selection in Arabidopsis accessions from regions with shorter days, suggesting that photoperiod act as a selective barrier for Al tolerance. A diel regulation and genetic diversity affect Al tolerance, suggesting that day-length orchestrates Al tolerance. Altogether, photoperiodic control of Al tolerance might contribute to solving the historical obstacle that imposes barriers for developing countries to reach a sustainable agriculture.
铝（Al）是酸性土壤（pH≤5.5）中作物生产力的限制因素，对发展中国家的食品安全构成了严峻制约。植物应对铝的主要机制涉及有机酸代谢和DNA检查点的调控。单独来看，这两种方法都不足以克服铝毒性。在分析大多数栽培植物的起源中心时，我们推测日照长度似乎是调节不同植物物种耐铝性的关键因素。我们观察到，随着与赤道距离的增加，耐铝性降低，这表明与光周期存在关联。我们证实，长日照（LD）物种通常比短日照（SD）物种对铝更敏感，而将番茄转变为短日照生长习性可提高其耐铝性。在长日照条件下，耐铝性降低与DNA检查点激活相关。此外，在日照时间较短地区的拟南芥种质中，与DNA检查点相关的基因正处于正选择状态，这表明光周期是耐铝性的选择性障碍。昼夜调节和遗传多样性影响耐铝性，这表明日照长度协调着耐铝性。总之，耐铝性的光周期控制可能有助于解决历史障碍，为发展中国家实现可持续农业消除障碍。
