Journal Article

Amelioration of boron toxicity in sweet pepper as affected by calcium management under an elevated CO sub(2) concentration

Lopez-Marin, Josefa, Amor, Francisco M, Pinero, Maria Carmen, Perez-Jimenez, Margarita

2017

Overview

We investigated B tolerance in sweet pepper plants (Capsicum annuun L.) under an elevated CO sub(2) concentration, combined with the application of calcium as a nutrient management amelioration technique. The data show that high B affected the roots more than the aerial parts, since there was an increase in the shoot/root ratio, when plants were grown with high B levels; however, the impact was lessened when the plants were grown at elevated CO sub(2), since the root FW reduction caused by excess B was less marked at the high CO sub(2) concentration (30.9% less). Additionally, the high B concentration affected the membrane permeability of roots, which increased from 39 to 54% at ambient CO sub(2) concentration, and from 38 to 51% at elevated CO sub(2) concentration, producing a cation imbalance in plants, which was differentially affected by the CO sub(2) supply. The Ca surplus in the nutrient solution reduced the nutritional imbalance in sweet pepper plants produced by the high B concentration, at both CO sub(2) concentrations. The medium B concentration treatment (toxic according to the literature) did not result in any toxic effect. Hence, there is a need to review the literature on critical and toxic B levels taking into account increases in atmospheric CO sub(2).

• Subject: Capsicum