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

Geromel Clara, Ferreira Lucia Pires, Davrieux Fabrice, Guyot Bernard, Ribeyre Fabienne, Dos Santos Scholz Maria Brigida, Protasio Pereira Luiz Filipe, Vaast Philippe, Pot David, Leroy Thierry, Androcioli Filho Armando, Gonzaga Esteves Vieira Luiz, Mazzafera Paulo, Marraccini Pierre. 2008. Effects of shade on the development and sugar metabolism of coffee (Coffea arabica L.) fruits. Plant Physiology and Biochemistry, 46 (5-6) : pp. 569-579.

Journal article ; Article de revue à facteur d'impact
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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-encoding genes in coffee beans; CaSUS2 gene transcripts levels were higher in SH than in FS. As no sucrose increase accompanied these changes, this suggests that sucrose metabolism was redirected to other metabolic pathways that need to be identified. (Résumé d'auteur)

Mots-clés Agrovoc : Coffea arabica, Métabolisme des glucides, Développement biologique, Culture sous couvert végétal, Expression des gènes, Fruit, Composition chimique, saccharose, Ombrage

Classification Agris : F62 - Plant physiology - Growth and development

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Geromel Clara, UNICAMP (BRA)
  • Ferreira Lucia Pires, IAPAR (BRA)
  • Davrieux Fabrice, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Guyot Bernard, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Ribeyre Fabienne, CIRAD-PERSYST-UMR Qualisud (FRA)
  • Dos Santos Scholz Maria Brigida, IAPAR (BRA)
  • Protasio Pereira Luiz Filipe, EMBRAPA (BRA)
  • Vaast Philippe, CIRAD-PERSYST-UPR Ecosystèmes de plantations (IND)
  • Pot David, CIRAD-BIOS-UMR DAP (FRA) ORCID: 0000-0001-6144-8448
  • Leroy Thierry, CIRAD-BIOS-UMR DAP (FRA)
  • Androcioli Filho Armando, IAPAR (BRA)
  • Gonzaga Esteves Vieira Luiz, IAPAR (BRA)
  • Mazzafera Paulo, UNICAMP (BRA)
  • Marraccini Pierre, CIRAD-BIOS-UMR DAP (BRA) ORCID: 0000-0001-7637-6811

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/544253/)

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