Effects of shade on the development and sugar metabolism of coffee (Coffea arabica L.) fruits

Plant Physiology and Biochemistry : PPB
Clara GeromelP Marraccini

Abstract

Coffee fruits grown in shade are characterized by larger bean size than those grown under full-sun conditions. The present study assessed the effects of shade on bean characteristics and sugar metabolism by analyzing tissue development, sugar contents, activities of sucrose metabolizing enzymes and expression of sucrose synthase-encoding genes in fruits of coffee (Coffea arabica L.) plants submitted to full-sun (FS) and shade (SH) conditions. Evolution of tissue fresh weights measured in fruits collected regularly from flowering to maturation indicated that this increase is due to greater development of the perisperm tissue in the shade. The effects of light regime on sucrose and reducing sugar (glucose and fructose) contents were studied in fresh and dry coffee beans. Shade led to a significant reduction in sucrose content and to an increase in reducing sugars. In pericarp and perisperm tissues, higher activities of sucrose synthase (EC 2.4.1.13) and sucrose-phosphate synthase (SPS: EC 2.4.1.14) were detected at maturation in the shade compared with full sun. These two enzymes also had higher peaks of activities in developing endosperm under shade than in full sun. It was also noted that shade modified the expression of SUS-en...Continue Reading

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Aug 26, 2011·International Journal of Biometeorology·José Ricardo Macedo PezzopaneLuiz Carlos Fazuoli
Apr 9, 2010·Plant, Cell & Environment·Tiffanie GiraultNathalie Leduc
Mar 22, 2018·Frontiers in Plant Science·José C RamalhoFábio M DaMatta
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Sep 1, 2018·Comprehensive Reviews in Food Science and Food Safety·Ahsan HameedHafiz Ansar Rasul Suleria
Oct 16, 2020·Journal of the Science of Food and Agriculture·Priscila V PereiraPatrícia C Bernardes
Feb 24, 2010·Journal of Agricultural and Food Chemistry·Paula M NobileCarlos A Colombo

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