Two digalactosyl D-chiro-inositols and two trigalactosyl D-chiro-inositols, members of the fagopyritol A series and fagopyritol B series, were isolated from buckwheat (Fagopyrum esculentum Moench) seeds. Structures of the first three were determined by 1H and 13C NMR. Fagopyritol B2 is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->2) -1D-chiro-inositol, and fagopyritol A2 is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->3)- 1D-chiro-inositol. Fagopyritol A3, a trigalactosyl D-chiro-inositol, is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1 -->6) -alpha-D-galactopyranosyl-(1-->3)- 1 D-chiro-inositol. From analysis of hydrolysis products, the second trigalactosyl D-chiro-inositol, fagopyritol B3, isalpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->6) -alpha-D-galactopyranosyl-(1-->2)-1D-chiro-inositol.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0008-6215(00)00320-7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Purification and molecular structure of two digalactosyl D-chiro-inositols and two trigalactosyl D-chiro-inositols from buckwheat seeds.
Carbohydr Res
March 2001
Department of Crop and Soil Sciences, Seed Biology, Cornell University Agricultural Experiment Station, Cornell University, Ithaca, NY 14853-1901, USA.
Two digalactosyl D-chiro-inositols and two trigalactosyl D-chiro-inositols, members of the fagopyritol A series and fagopyritol B series, were isolated from buckwheat (Fagopyrum esculentum Moench) seeds. Structures of the first three were determined by 1H and 13C NMR. Fagopyritol B2 is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->2) -1D-chiro-inositol, and fagopyritol A2 is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->3)- 1D-chiro-inositol.
View Article and Find Full Text PDFFagopyritol B1, O-alpha-D-galactopyranosyl-(1-->2)-D-chiro-inositol, a galactosyl cyclitol in maturing buckwheat seeds associated with desiccation tolerance.
Planta
May 1998
Department of Soil, Crop and Atmospheric Sciences, Cornell University Agricultural Experiment Station, Cornell University, Ithaca, N.Y. 14853-1901, USA.
Article Synopsis
- Buckwheat embryos contain a significant soluble carbohydrate, fagopyritol B1, making up 40% of their total composition and associated with five other related alpha-galactosyl D-chiro-inositols.
- The presence of all fagopyritols is confirmed to be easily hydrolyzable by alpha-galactosidase, indicating their structural linkage.
- Higher levels of fagopyritol B1 during seed development enhance desiccation tolerance and storability, with its accumulation linked to better seed vigor under cooler growth conditions.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!