Parameters Symptomatic for Boron Toxicity in Leaves of Tomato Plants

By L. M. Cervilla, B. Blasco, J. J. Ríos, M. A. Rosales, E. Sánchez-Rodríguez, M. Rubio-Wilhelmi, L. Romero, J. Ruiz. 2012

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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 O 2 • − 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.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/739cf7649bf2e7cb942b95ee91e37453424be5a9

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