2008
DOI: 10.1590/s0103-84782008000100018
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Alterações morfofisiológicas em folhas de Coffea arabica L. cv. "Oeiras" sob influência do sombreamento por Acacia mangium Willd

Abstract: RESUMO Diferenças na disponibilidade de radiação podem causar modificações na estrutura e função das folhas do

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Cited by 27 publications
(17 citation statements)
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“…The decrease on leaf blade thickness of the shaded conilon coffee probably occurred due to the leaf blade expansion and difference on photoassimilates distribution in relation to full sun cultivated plants, which presented thicker leaves. Our results corroborate those of Voltan et al (1992) and Cordeiro-Gomes (2008) who verified that leaves of coffee trees exposed to higher levels of radiation had a greater thickness of the leaf blade. This increase in mesophyll thickness causes reduction of the specific leaf area, which, according to some authors, propitiates to full sun plants a greater photosynthetic capacity per unit of leaf area when compared to shaded plants (Niinemets et al, 1998).…”
Section: Methodssupporting
confidence: 93%
“…The decrease on leaf blade thickness of the shaded conilon coffee probably occurred due to the leaf blade expansion and difference on photoassimilates distribution in relation to full sun cultivated plants, which presented thicker leaves. Our results corroborate those of Voltan et al (1992) and Cordeiro-Gomes (2008) who verified that leaves of coffee trees exposed to higher levels of radiation had a greater thickness of the leaf blade. This increase in mesophyll thickness causes reduction of the specific leaf area, which, according to some authors, propitiates to full sun plants a greater photosynthetic capacity per unit of leaf area when compared to shaded plants (Niinemets et al, 1998).…”
Section: Methodssupporting
confidence: 93%
“…(carotenóides e clorofila total), observados nas plantas cultivadas a pleno sol podem indicar a ocorrência da fotoinibição nestas plantas, devido à radiação, no que se refere à captação de luz em ambientes de menor luminosidade e à proteção contra a fotodestruição em ambiente de maior luminosidade (GOMES et al, 2008). A luz absorvida pelos carotenóides é transferida à clorofila para o processo de fotossíntese.…”
Section: Os Baixos Teores De Pigmentos Fotossintéticosunclassified
“…Em relação à técnica de avaliação da atividade antimicrobiana, existem diversos fatores que podem influenciar no método de difusão como a solubilidade da amostra e a interação entre o meio de cultura e a substância antimicrobiana testada, além do disco de papel poder influenciar no contato desta com o microrganismo, por isso é importante testar as duas técnicas (ALVES et al, 2008).…”
Section: Caracterização Do óLeo Essencial De Sementes De Jambolãounclassified