Resistance Mechanisms of Peltophorum dubium (Sprengel) Taubert Submitted to Flood Conditions

Abstract

Peltophorum dubium (Sprengel) Taubert seedlings were submitted to 60 days of flooding, with and without Ca + . During this period, growth, root anatomy and chlorophyll content were analyzed. The relative growth rates (RGR) of roots and shoots were higher in non-flooded plants. The flooded treatments, with and without Ca + , have affected the roots growth but did not affect the shoot and the stem diameter. The anatomy analysis showed thickening of the sclerenchyma in 15 and 60 days in the flooded treatments with and without Ca + , and the vessel diameter was smaller at 45 days. The chlorophyll content differed, however it was not statistically significant. The results indicate that Peltophorum dubium as candidate specie for reforestation in areas subjected to continuous flooding for up to 60 days, since no mortality was observed.Keywords: angico amarelo, calcium application, flooded environments. Mecanismos de Resistência de Peltophorum dubium (Sprengel) TaubertSubmetido a Condições de Alagamento RESUMOMudas de Peltophorum dubium (Sprengel) Taubert foram submetidas a 60 dias de alagamento, com e sem a aplicação de cálcio. Durante esse período, foram avaliados: crescimento, anatomia radicular e teor de clorofila. As taxas de crescimento relativo (TCR) de raiz e parte aérea foram maiores nas plantas não alagadas. O alagamento, com e sem aplicação do cálcio, afetou negativamente o comprimento das raízes, mas isso não afetou a parte aérea e o diâmetro do caule. As análises anatômicas mostraram aumento na espessura do esclerênquima nos tratamentos alagado e alagado + Ca + aos 15 e 60 dias, e o diâmetro dos vasos foi menor aos 45 dias. Nos teores de clorofila foram registradas diferenças entre os tratamentos, porém não foram diferenças estatisticamente significativas. Os resultados indicam que a Peltophorum dubium é espécie candidata para reflorestamento em áreas sujeitas a alagamento contínuo por até 60 dias, uma vez que não foi observada mortalidade.Palavras-chave: angico amarelo, aplicação de cálcio, ambientes alagados. Resistance Mechanisms of Peltophorum dubium (Sprengel) Taubert...

Does silicon and salicylic acid contribute in the morphophysiology of Schinus terebinthifolia seedlings under flooding?

“…S. terebinthifolia seedlings subjected to water stress with application of SA developed better when cultivated under water (100% daily irrigation capacity) and under water deficit by 12 days, reinforcing the potential of SA to mitigate stressful effect (Saracho et al, 2021). Carvalho et al (2016) suggests that the increment in height is an increase was a response to the flooding condition as a strategy to keep the leaves above the water level, as observed for Peltophorum dubium (Sprengel) Taub. seedlings after 15 days of flooding, similar to what was observed for S. terebinthifolia seedlings.…”

“…The increase in LA may be associated with greater stability in water relations, as observed in g s and WUE, contributing to the increase in the number of leaves and, consequently, in vegetative growth. When plants present metabolic adjustments to internal water use, the effect of ethylene is reduced, thus reducing leaf abscission (Carvalho et al, 2016), and SA acts stimulating vegetative growth (Santos et al, 2023).…”

Genetic diversity of Peltophorum dubium (Spreng.) Taub. progenies from the states of Minas Gerais and Mato Grosso do Sul, Brazil

“…Peltophorum dubium reaches between 15-25 m in height, and has medicinal and silvicultural potential (Lorenzi, 1992;Bertolini et al, 2015;Ciaccio et al, 2020). This legume can be used to restore degraded areas, enrich native forests, and in agroforestry systems due to its potential for biological nitrogen fixation (Carvalho et al, 2016;Caron et al, 2019).…”