Boron alters cation exchange properties of corn roots but does not decrease aluminum toxicity

Authors

  • Julierme Zimmer Barbosa Universidade Federal do Paraná
  • Antonio Carlos Vargas Motta Universidade Federal do Paraná
  • Rangel Consalter Universidade Federal do Paraná
  • Volnei Pauletti Universidade Federal do Paraná

DOI:

https://doi.org/10.14393/BJ-v34n1a2018-36637

Keywords:

metals sorption, root traits, Ionic stress, Plant methods

Abstract

Most studies that have registered amelioration of Al toxicity due to root cation exchange capacity (CEC) decrease with B application were conducted using eudicotyledonous species (high root CEC). However, the effect of B/Al interaction on the root CEC values in species with low root CEC such as corn (Zea mays L.) has been understudied. Thus, this study aimed to: (1) verify if B decreases root CEC and if it benefits the growth and nutrient uptake in corn plants under Al toxicity; and (2) verify which method of root CEC analysis better differentiates the effects of B and Al. Corn seedlings were grown in complete nutrient solution with the following treatments: 0, 50, and 200 mM of B versus 0 and 300 mM of Al. Root attributes showed correlations with nutrient depletion from the nutrient solution, but nutrient depletion generally varied with transpiration in two depletion tests. The addition of B or Al in nutrient solution decreased root CEC; however, B failed to decrease Al toxicity in corn plants. The four methods used to determine CEC of corn roots had contrasting results, particularly with respect to the effect of B in the presence of Al.

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Published

2018-08-08

How to Cite

BARBOSA, J.Z., MOTTA, A.C.V., CONSALTER, R. and PAULETTI, V., 2018. Boron alters cation exchange properties of corn roots but does not decrease aluminum toxicity . Bioscience Journal [online], vol. 34, no. 4, pp. 917–926. [Accessed10 December 2022]. DOI 10.14393/BJ-v34n1a2018-36637. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/36637.

Issue

Section

Agricultural Sciences