Biopriming of sweet pepper and tomato seeds with Ascophyllum nodosum

Published

2021-01-01

Acondicionamiento de semillas de pimiento y tomate con Ascophyllum nodosum

Keywords:

Brown seaweeds, Capsicum anuum, Germination, Solanun lycopersicum. (en)
Algas marrones, Capsicum anuum, Germinación, Solanum lycopersicum. (es)

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Authors

Mariana Bertoncini Peixoto da Silva Universidade Federal da Fronteira Sul https://orcid.org/0000-0001-5658-6555
Vanessa Neumann Silva Federal University of Fronteira Sul https://orcid.org/0000-0002-5046-0545
Letícia Câmara Vieira Federal University of Fronteira Sul https://orcid.org/0000-0002-4766-8636

Abstract (en)
Abstract (es)

Organic agriculture has been growing in recent years; however, one of the limitations in this area is the treatment of seeds with natural products and less aggressive to the environment. Seed biopriming with brown seaweed extract can be used to improve the physiological quality of seeds. This study aimed to evaluate the effect of seed biopriming with Ascophyllum nodosum extracts (algae) on pepper and tomato seed quality. Pepper seeds of All Big and Alegria cultivars (cvs), and tomato seeds of Cereja and Rio Grande cvs were used. The extract concentrations were 0, 125, 250, and 375 ppm. A completely randomized design in a 2×4 factorial scheme was used. The variables analyzed were percentage germination; germination speed index; root and shoot length; and root and shoot dry weight. Sweet pepper biopriming at 125 ppm enhanced germination in 16.5% for All Big cv; but it did not benefit Alegria cv. A. nodosum as a biopriming provided an increase of 50% in root length growth in Alegria cv; although, it had a negative effect on the growth of pepper seedlings of the All Big cv at 375 ppm. Tomato seed biopriming with A. nodosum at 125 ppm, enhanced root and shoot growth by 38 and 31% of Cereja cv; Nevertheless, it did not provide higher levels of germination. For Rio Grande cv, shoot growth was benefited at 125 ppm, with approximately 1.04 cm larger than the control. The effect of Ascophyllum nodosum priming depended on its concentration and the cultivar given that, different responses were obtained, also due to the compounds of the extract.

La implementación de la agricultura orgánica ha tenido un desarrollo creciente los últimos años. Sin embargo, una de las limitaciones de esta área es el tratamiento de semillas con productos naturales y menos agresivos con el medio ambiente. El acondicionamiento de semillas con extracto de algas marrones se puede utilizar para mejorar la calidad fisiológica de las semillas. El objetivo de este estudio fue evaluar el efecto del acondicionamiento de semillas con extractos de Ascophyllum nodosum (alga) sobre la calidad de las semillas de pimiento cvs All Big y Alegria y las semillas de tomate de cvs Cereja y Rio Grande. Extractos de A. nodosum a 0, 125, 250 y 375 ppm fueron aplicados a las semillas. Como diseño experimental, se implementó un esquema factorial 2 × 4 completamente aleatorio. Las variables analizadas fueron porcentaje de germinación; índice de velocidad de germinación; longitud de raíz y brote; y el peso seco de la raíz y el brote. Los resultados obtenidos fueron sometidos a análisis de varianza y regresión. El acondicionamiento de semillas de pimiento con A. nodosum a 125 ppm, promovió incrementos en la germinación de semillas del 16,5% para el cv All Big; aunque, no benefició a los cv Alegria. El acondicionamiento proporcionó mayores niveles de crecimiento de raíces en un 50% en el cv Alegria, sin embargo, tuvo un efecto negativo en el crecimiento de las plántulas de pimiento del cv All Big a 375 ppm. El acondicionamiento de semillas de tomate con extracto de A. nodosum, a 125 ppm, afectó positivamente el crecimiento de cv Cereja mejorando el brote en un 31% 38% la raíz; sin embargo, no proporcionó mayores niveles de germinación. Para el cv Río Grande, sólo se benefició el crecimiento de brotes a 125 ppm con un promedio 1,04 cm superior al control. El efecto del acondicionamiento de Ascophyllum nodosum dependió de su concentración y del cultivar dado que se obtuvieron diferentes respuestas, debido también a los compuestos del extracto.

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