Table of Contents
Journal of Botany
Volume 2012, Article ID 726206, 17 pages
http://dx.doi.org/10.1155/2012/726206
Research Article

Parameters Symptomatic for Boron Toxicity in Leaves of Tomato Plants

Departament of Plant Physiology, Faculty of Sciences, University of Granada, 18071 Granada, Spain

Received 23 January 2012; Accepted 22 February 2012

Academic Editor: Agustín González-Fontes

Copyright © 2012 Luis M. Cervilla et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The incidence of boron (B) toxicity has risen in areas of intensive agriculture close to the Mediterranean sea. The objective of this research was to study the how B toxicity (0.5 and 2 mM B) affects the time course of different indicators of abiotic stress in leaves of two tomato genotypes having different sensitivity to B toxicity (cv. Kosaco and cv. Josefina). Under the treatments of 0.5 and 2 mM B, the tomato plants showed a loss of biomass and foliar area. At the same time, in the leaves of both cultivars, the B concentration increased rapidly from the first day of the experiment. These results were more pronounced in the cv. Josefina, indicating greater sensitivity than in cv. Kosaco with respect to excessive B in the environment. The levels of O2 and anthocyanins presented a higher correlation coefficient (r>0.9) than did the levels of B in the leaf, followed by other indicators of stress, such as GPX, chlorophyll b and proline (r>0.8). Our results indicate that these parameters could be used to evaluate the stress level as well as to develop models that could help prevent the damage inflicted by B toxicity in tomato plants.