Mamani-Huarcaya, Betty MGonzález-Fontes, AgustínNavarro-Gochicoa, M. TeresaCamacho-Cristóbal, Juan JoséCeacero, Carlos J.Herrera Rodríguez, María BegoñaFernández Cutire, OscarRexach, Jesús2023-11-162023-11-162022-06-06Plant Physiol Biochem. 185 (2022) 167–17710.1016/j.plaphy.2022.06.003http://hdl.handle.net/10433/16734Agencia Andaluza de Cooperación Internacional para el Desarrollo (Consejería de Igualdad y Políticas Sociales) from Junta de Andalucía (2016SEC014), by the Consejería de Economía, Innovación, Ciencia y Empleo from Junta de Andalucía (BIO- 266) and by the Ministerio de Ciencia e Innovación (Grant PID2020- 118327GB-I00 funded by MCIN/AEI/10.13039/501100011033), SpainBoron (B) toxicity is a major agricultural problem that causes a considerable decrease in crop yield and quality. The soil in arid and semi-arid areas is often subjected to excessive B content. Southwestern Perú (department of Tacna) is characterized by high B levels in its agricultural land and irrigation water. This work analyzes the response of two local maize (Zea mays) landraces (Pachía and Sama) from Tacna to B toxicity. Both landraces were, therefore, grown in hydroponic media under control and B toxicity conditions, and after 10 days, seedlings were harvested and B content, B-transporter gene expressions, and several morphological and physiological parameters were determined. The leaf and root soluble B content was lower in Sama than in Pachía when both landraces were subjected to high B concentrations, which could be explained by its higher expression levels of B-efflux transporters. The capacity of Sama to maintain reduced levels of soluble B in its leaves and roots led to decreased leaf damage and higher photosynthetic and growth parameters under B toxicity conditions. These results support the proposal that Sama would perform better than Pachía under excessive B conditions, thus making it a more suitable landrace to be used in soils with toxic levels of B.application/pdfenAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/AquaporinsBoron toxicityBoron transportersPhotosynthesisZea maysjournal articleopen access