Your browser doesn't support javascript.
loading
Climatic Variation on Gas Exchange and Chlorophyll a Fluorescence in Tabebuia roseoalba and Handroanthus heptaphyllus (Bignoniaceae)
Ribeiro, João Everthon da Silva; Coêlho, Ester dos Santos; Souza, José Thyago Aires; Melo, Marlenildo Ferreira; Dias, Thiago Jardelino.
Afiliação
  • Ribeiro, João Everthon da Silva; Federal University of Paraíba. Areia. BR
  • Coêlho, Ester dos Santos; Federal Rural University of the Semiarid Region. Mossoró. BR
  • Souza, José Thyago Aires; National Institute of Semiarid. Campina Grande. BR
  • Melo, Marlenildo Ferreira; Federal Rural University of the Semiarid Region. Mossoró. BR
  • Dias, Thiago Jardelino; Federal University of Paraíba. Areia. BR
Braz. arch. biol. technol ; Braz. arch. biol. technol;65: e22210338, 2022. tab
Article em En | LILACS-Express | LILACS | ID: biblio-1364474
Biblioteca responsável: BR1.1
ABSTRACT
Abstract Climatic variation throughout the day influences the ecophysiological performance of plants at different growth stages and phases. Therefore, this work aimed to evaluate the effect of climatic variation on ecophysiological aspects of T. roseoalba and H. heptaphyllus at different hours of the day and indicate the ideal time for measuring ecophysiological variables in these species. The research was carried out in a greenhouse at the forest nursery of the Federal University of Paraíba, Campus II, in the municipality of Areia, Paraíba state, Northeastern Brazil. The experimental design was completely randomized, consisting of 10 evaluation times throughout the day (from 8 am to 5 pm), with 1 h hour interval between each evaluation. Temperature and air relative humidity inside and outside the greenhouse were evaluated to understand the effect on gas exchange (net assimilation rate of CO2, stomatal conductance, transpiration rate, internal concentration of CO2, and vapor-pressure deficit) and chlorophyll a fluorescence (initial, maximum, and variable fluorescence, photochemical quenching, and electron transport rate). Data were submitted to canonical correlation analysis and principal component analysis to verify the relationship between climatic and ecophysiological variables. For both species, higher correlation was found between internal and external relative humidity with all the ecophysiological variables analyzed, except for initial fluorescence. Thus, climatic factors influenced the photosynthetic performance of T. roseoalba and H. heptaphyllus plants, and 8 am to 9 am is indicated for carrying out ecophysiological evaluations in both species.
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Tipo de estudo: Clinical_trials Idioma: En Revista: Braz. arch. biol. technol Assunto da revista: BIOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
Imprimir
XML
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: LILACS Tipo de estudo: Clinical_trials Idioma: En Revista: Braz. arch. biol. technol Assunto da revista: BIOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil