Efeitos do filme de partículas nos parâmetros ecofisiológicos de duas espécies arbóreas sob restrição hídrica

Autores

  • Anderson dos Santos Postgraduate Program in Agriculture and Environment, Universidade Federal de Alagoas, Arapiraca, AL, Brazil https://orcid.org/0000-0001-7195-4520
  • Roberta Samara Nunes de Lima Postgraduate Program in Agriculture and Environment, Universidade Federal de Alagoas, Arapiraca, AL, Brazil https://orcid.org/0000-0002-5478-5558
  • Emerson de Lima Exact Sciences Center, Universidade Federal de Alagoas, Arapiraca, AL, Brazil https://orcid.org/0000-0001-6703-6807
  • Alexandre Maniçoba da Rosa Ferraz Jardim Department of Biodiversity, Universidade Estadual Paulista, Rio Claro, SP, Brazil https://orcid.org/0000-0001-7094-3635
  • Elania Freire da Silva Department of Agricultural and Forestry Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0002-7176-3609
  • Ricardo Araújo Ferreira Júnior Universidade Federal de Alagoas, Rio Largo, AL, Brazil https://orcid.org/0000-0002-5958-6275
  • Flávia de Barros Prado Moura Postgraduate Program in Agriculture and Environment, Universidade Federal de Alagoas, Arapiraca, AL, Brazil https://orcid.org/0000-0003-0014-9561
  • José Vieira Silva Postgraduate Program in Agriculture and Environment, Universidade Federal de Alagoas, Arapiraca, AL, Brazil https://orcid.org/0000-0003-3419-3755

DOI:

https://doi.org/10.1590/1983-21252024v3712381rc

Palavras-chave:

Caatinga. Estresse térmico. Pigmentos fotossintéticos. Fotoquímica. Troca gasosa.

Resumo

O objetivo deste estudo foi avaliar os efeitos do uso do filme de partículas associado a dois regimes hídricos sobre os parâmetros ecofisiológicos de plantas jovens de duas espécies nativas do semiárido brasileiro (Tabebuia aurea e Ziziphus joazeiro). Os experimentos foram conduzidos em blocos casualizados em esquema fatorial 2 × 2, com nove repetições. Os tratamentos utilizados foram aplicação de filme de partículas (Surround® WP) na concentração de 5% e sem filme ou 0%, e dois regimes hídricos de irrigação baseados na evapotranspiração de referência (ETo), irrigado com 100% da ETo e não irrigado ou 0% da ETo. As determinações das trocas gasosas foram realizadas aos 0, 15, 30 e 45 dias após a aplicação dos tratamentos, enquanto as análises dos pigmentos fotossintéticos foram realizadas apenas ao final do experimento. As espécies Tabebuia aurea e Ziziphus joazeiro apresentaram tolerância ao estresse hídrico, demonstrada pela elevada eficiência no uso da água. Por outro lado, a aplicação de filme de partícula causou aumento na condutância estomática, transpiração e na eficiência intrínseca do uso da água e reduções na temperatura foliar e na eficiência instantânea do uso da água pelas plantas de ambas as espécies estudas. O filme de partículas foi eficiente em conferir propriedades fotoprotetoras verificadas pelo aumento no teor de pigmentos fotossintéticos. No entanto, a utilização desse filme requer investigações mais aprofundadas, que possam permitir um melhor entendimento de seu manejo em espécies arbóreas do semiárido brasileiro.

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Publicado

15-04-2024

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Artigo Científico