Chabrillange Nathalie, Dussert Stéphane, Engelmann Florent, Doulbeau Sylvie, Hamon Serge. (2000). Desiccation tolerance in relation to soluble sugar contents in seeds of ten coffee (Coffea L.) species. In :
Workshop on desiccation tolerance and sensitivity of seeds and vegetative plant tissues. Seed Science Research, 10 (3), p. 393-396. Desiccation Tolerance and Sensitivity of Seeds and Vegetative Plant Tissues : International Workshop, 3. ISSN 0960-2585.
Titre du document
Desiccation tolerance in relation to soluble sugar contents in seeds of ten coffee (Coffea L.) species
Année de publication
2000
Auteurs
Chabrillange Nathalie, Dussert Stéphane, Engelmann Florent, Doulbeau Sylvie, Hamon Serge
In
Workshop on desiccation tolerance and sensitivity of seeds and vegetative plant tissues
Source
Seed Science Research, 2000,
10 (3), p. 393-396 ISSN 0960-2585
Colloque
Desiccation Tolerance and Sensitivity of Seeds and Vegetative Plant Tissues : International Workshop, 3.
Large differences in seed desiccation sensitivity have been observed previously among ten coffee species (Coffea arabica, C. brevipes, C. canephora, C. eugenioides, C. humilis, C. liberica, C. pocsii, C. pseudozanguebariae, C. sessiliflora and C. stenophylla). Of these species, C. liberica and C. humilis were the most sensitive to desiccation and C. pseudozanguebariae the most tolerant. A study was carried out using the same seed lots to investigate if these differences in desiccation tolerance could be correlated with differences in soluble sugar content. Soluble sugars were extracted from dry seeds and analysed using high performance liquid chromatography. The seed monosaccharide (glucose and fructose) content was very low (1.5 to 2 mg/g dry weight (dw)) in all species studied. The sucrose content ranged from 33 mg/g dw in C. liberica seeds to 89 mg/g dw in seeds of C. pocsii. Raffinose was detected in the seeds of only five species (C. arabica, C. brevipes, C. humilis, C. sessiliflora, C. stenophylla), among which only three species (C. arabica, C. sessiliflora and C. brevipes) also contained stachyose. Both raffinose and stachyose were present in very low quantities (0.3-1.4 mg/g dw and 0.1-0.7 mg/g dw, respectively). Verbascose was never detected. No significant relationship was found between seed desiccation sensitivity and : (i) the sugar content ; (ii) the presence/absence of oligosaccharides ; and (iii) the oligosaccharide:sucrose ratio. (Résumé d'après auteur)
Plan de classement
Mécanismes physiologique et biochimiques des plantes [076PHYBIO]
Descripteurs
CAFE ; GRAINE ; DESSICCATION ; TOLERANCE ; COMPOSITION CHIMIQUE ; SUCRE ; EXTRACTION ; ANALYSE QUANTITATIVE ; ETUDE EXPERIMENTALE ; ETUDE COMPARATIVE
Description Géographique
AFRIQUE
Localisation
Fonds IRD [F B010023558] ;
Montpellier (Centre IRD)
Identifiant IRD
fdi:010023558
