%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A Chabrillange, Nathalie
%A Dussert, Stéphane
%A Engelmann, Florent
%A Doulbeau, Sylvie
%A Hamon, Serge
%T Desiccation tolerance in relation to soluble sugar contents in seeds of ten coffee (Coffea L.) species
%B Workshop on desiccation tolerance and sensitivity of seeds and vegetative plant tissues
%D 2000
%L fdi:010023558
%G ENG
%J Seed Science Research
%@ 0960-2585
%K CAFE ; GRAINE ; DESSICCATION ; TOLERANCE ; COMPOSITION CHIMIQUE ; SUCRE ; EXTRACTION ; ANALYSE QUANTITATIVE ; ETUDE EXPERIMENTALE ; ETUDE COMPARATIVE
%K AFRIQUE
%N 3
%P 393-396
%U https://www.documentation.ird.fr/hor/fdi:010023558
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_55-56/010023558.pdf
%V 10
%W Horizon (IRD)
%X 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$) also contained stachyose. Both raffinose and stachyose were present in very low quantities (0.3-1.4 mg/g dw and 0.1-0.7 mg/g dw, respectively). Verbascose was never detected. No significant relationship was found between seed desiccation sensitivity and : (i) the sugar content ; (ii) the presence/absence of oligosaccharides ; and (iii) the oligosaccharide:sucrose ratio. (Résumé d'après auteur)
%B Desiccation Tolerance and Sensitivity of Seeds and Vegetative Plant Tissues : International Workshop
%$ 076PHYBIO