Anti-stress effects of humic acids of vermicompost in two rice (Oryza sativa. L) cultivars

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Published: Aug 1, 2018
Keywords:
hydric stress, peroxidase, total proteins, humic substances

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Reinier Hernández
Instituto Politécnico Nacional-CIIDIR-Unidad Oaxaca
Celerino Robles
Instituto Politécnico Nacional-CIIDIR-Unidad Oaxaca
Andrés Calderín
Universidad Federal Rural de Rio de Janeiro (UFRRJ)
Fernando Guridi
Universidad Agraria de La Habana (UNAH)
Inés M. Reynaldo
Instituto Nacional de Ciencias Agrícolas (INCA)
Deborah González
Instituto Nacional de Ciencias Agrícolas (INCA)

Abstract

Humic acids (AH) were extracted and isolated from bovine manure vermicompost, and they were partially characterized using UV-vis and / FT-IR. They were sprinkled foliarly at 32 days after germination coinciding with the start-up phase tillage in rice cultivation (Oryza sativa L.) under conditions of irrigation and water deficit. Three concentrations of AH (30, 34 and 38 mg L-1) were used, in addition to a control treatment without application. Specifically in the active tillering stage, the effect of foliar application of AH under irrigation conditions and water deficit was evaluated in indicators such as: plant height, dry mass in the root section, peroxidase enzyme activity (POX) and content of soluble proteins. The results indicated positive effects of the AH on the biochemical - physiological indicators evaluated in the vegetative phase, with effects on the dry mass in the radical part up to 40 % higher than the control, observing evidence of a possible protective effect against the water deficit by the AH. It was concluded that a possible response could be the mimetic action of AH with the abscisic acid hormone (ABA), producing equivalent effects to this.

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How to Cite
Hernández, R., Robles, C., Calderín, A., Guridi, F., Reynaldo, I. M., & González, D. (2018). Anti-stress effects of humic acids of vermicompost in two rice (Oryza sativa. L) cultivars. Cultivos Tropicales, 39(2), 65–74. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/1447
Issue
Vol. 39 No. 2 (2018): abril-junio
Section
Original Article

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