PEROXIDASE AND POLYPHENOLOXIDASE ACTIVITIES IN TOMATO ROOTS INOCULATED WITH Glomus clarum or Glomus fasciculatum

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Published: May 31, 2013
Keywords:
arbuscular mycorrhizae, Glomus, isoenzymes, peroxidases, tomato, polyphenoloxidases

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Yakelín Rodríguez
Instituto Nacional de Ciencias Agrícolas

Abstract

Roots of tomato plants cultivated using mycorrhizal inoculant-coated seeds were studied in order to evaluate the induction dynamics of defense mechanisms in the tomato-Glomus clarum and tomato-Glomus fasciculatum interaction through peroxidase and polyphenoloxidase behavior. Both enzymes kept low activity levels at early symbiosis stages; thereinafter enzymatic activities increased in colonized roots reaching a maximum, which was higher in G. clarum-inoculated plants, then these activities declined. The isoenzymatic analysis was carried out the days of the dynamics when the studied enzymatic activities were relevant. In general, all the treatments showed four constitutive polyphenoloxidase isoforms with differences in their
appearance on time and intensity, while three constitutive
peroxidase isoenzymes and an additional one in colonized roots were detected. Our results indicated that arbuscular mycorrhizal fungi initially provoked a like-defense response in tomato roots, which was subsequently suppressed. Indeed, a higher compatibility between G. fasciculatum species and tomato plant was suggested because of a lower induction of both enzymes in G. fasciculatum-colonized plants.

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How to Cite
Rodríguez, Y. (2013). PEROXIDASE AND POLYPHENOLOXIDASE ACTIVITIES IN TOMATO ROOTS INOCULATED WITH Glomus clarum or Glomus fasciculatum. Cultivos Tropicales, 22(1), 11–16. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/704
Issue
Vol. 22 No. 1 (2001)
Section
Original Article

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