Physiological responses of <i>Eucalyptus urophylla</i> young plants treated with biostimulant under water deficit

Autores/as

DOI:

https://doi.org/10.5902/1980509826206

Palabras clave:

Woody plants, Plant growth regulators, Drought, Water stress

Resumen

Biostimulants consist of a mixture of growth regulators that, when they are sprayed on plants, act on hormonal balance, enhancing its development. Stimulate® is a biostimulant composed by indole butyric acid (0.005%), kinetin (0.009%) and gibberellic acid (0.005%) which promotes root growth, improves water and nutrients uptake, and helps restore plant hormonal balance. This research was based on the hypothesis that Stimulate® spraying can be an alternate way to mitigate negative effects of soil water-limiting on plant growth. The experimental work was performed in greenhouse and aimed to evaluate physiological responses of young plants of Eucalyptus urophylla sprayed with different Stimulate® concentrations and submitted to the following irrigation regimes: full, partial and no irrigation. Leaf water potential, relative water content, net photosynthesis, plant height and main root length were measured. Under water-limited conditions, plants sprayed with Stimulate® showed higher net photosynthesis and relative water content had a less decrease, due to osmotic adjustment. Spraying with Stimulate® also provided greater plant height and longer main root length in plants under water deficit. We conclude that the use of Stimulate® can be a viable option to mitigate negative water stress physiological effects in young plants of Eucalyptus urophylla, helping to partially maintain the plant growth under water-limited conditions.

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Biografía del autor/a

Rayka Kristian Alves Santos, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista, BA

Engenheira Agrônoma, Doutora em Agronomia, Bolsista PNPD/CAPES do Programa de Pós-Graduação em Agronomia da Universidade Estadual do Sudoeste da Bahia

Paulo Araquém Ramos Cairo, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista, BA

Engenheiro Agrônomo, Doutor em Fisiologia Vegetal, Professor Pleno da Universidade Estadual do Sudoeste da Bahia, Departamento de Fitotecnia e Zootecnia

Romário Pereira Barbosa, Pesquisador Autônomo, Vitória da Conquista, BA

Engenheiro Agrônomo, Mestre em Agronomia

Janderson de Jesus Lacerda, Universidade Estadual de Santa Cruz, Ilhéus, BA

Engenheiro Agrônomo, Mestre em Agronomia, Doutorando em Produção Vegetal na Universidade Estadual de Santa Cruz

Caio da Silva Mafra Neto, Pesquisador Autônomo, Conceição da Barra, ES

Engenheiro Florestal, Suzano S.A.

Theilon Henrique de Jesus Macedo, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista, BA

Engenheiro Florestal, Mestrando em Ciências Florestais

Citas

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Publicado

2019-09-30

Cómo citar

Santos, R. K. A., Cairo, P. A. R., Barbosa, R. P., Lacerda, J. de J., Mafra Neto, C. da S., & Macedo, T. H. de J. (2019). Physiological responses of <i>Eucalyptus urophylla</i> young plants treated with biostimulant under water deficit. Ciência Florestal, 29(3), 1072–1081. https://doi.org/10.5902/1980509826206

Número

Vol. 29 Núm. 3 (2019)

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Artigos

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