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The effect of chilling on the photosynthetic activity in coffee (Coffea arabica L.) seedlings: The protective action of chloroplastid pigments Braz. J. Plant Physiol.
Oliveira,Jurandi Gonçalves de; Alves,Pedro Luis C.A.; Magalhães,Antonio Celso.
Coffea arabica is considered to be sensitive to low temperatures, being affected throughout its entire life cycle. Injury caused by chilling (low temperatures above zero degree centigrade) is characterized primarily by inhibition of the photosynthetic process. The objective of this work was to evaluate the role of photosynthetic pigments in the tolerance of coffee (C. arabica L.) seedlings to chilling. The evaluation the photosynthetic activity was made by emission of Chl a fluorescence at room temperature (25 ºC) in vivo and in situ, using a portable fluorometer. The pigment content was obtained by extraction with 80 % acetone, while estimation of membrane lipid peroxidation was determined by measuring the MDA content in leaf tissue extracts. The results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chlorophyll a fluorescence; Coffee; Lipid peroxidation; Photosynthetic pigments.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000200003
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