2010
DOI: 10.1590/s0034-737x2010000500008
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SPAD-502 readings in response to photon fluence in leaves with different chlorophyll content

Abstract: RESUMO Leituras do SPAD-502 em resposta a fluência de fótons em folhas com diferentes teores de clorofilaO clorofilômetro (SPAD-502) é amplamente utilizado para estimar teores de clorofila, mas a falta de uniformidade na distribuição dos cloroplastos pode afetar sua precisão. Os objetivos deste estudo foram avaliar o efeito da fluência de fótons (F = irradiância x tempo de iluminação) em folhas com teores diferentes de clorofila e determinar o efeito da relação clorofila a/b nos valores do SPAD em quatro espéc… Show more

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Cited by 7 publications
(2 citation statements)
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“…Values of daily photon fluence recorded during this study are within the range of daily irradiance reported by others for central Amazonia (Ribeiro et al 1982, Nascimento andMarenco 2010). As Ψ LP in the WWS treatment (soil at field capacity) was -300 kPa in both species, I concluded that there was an imbalance between the soil water tension and Ψ LP , in agreement with the findings of Donovan et al (2001) for several species (e.g.…”
Section: Environmental Conditions During the Experimentssupporting
confidence: 92%
“…Values of daily photon fluence recorded during this study are within the range of daily irradiance reported by others for central Amazonia (Ribeiro et al 1982, Nascimento andMarenco 2010). As Ψ LP in the WWS treatment (soil at field capacity) was -300 kPa in both species, I concluded that there was an imbalance between the soil water tension and Ψ LP , in agreement with the findings of Donovan et al (2001) for several species (e.g.…”
Section: Environmental Conditions During the Experimentssupporting
confidence: 92%
“…The authors did not find a significant correlation between the measured parameters. However, Nascimento and Marenco (2010) observed that SPAD values may vary in leaves with high levels of chlorophyll, probably due to the uneven distribution of chloroplasts in bright sunlight.…”
Section: Introductionmentioning
confidence: 99%