Beleski-Carneiro E B, Ganter J L, Reicher F
Department of Biochemistry, UFPR, Curitiba, PR, Brazil.
Int J Biol Macromol. 1999 Dec 1;26(4):219-24. doi: 10.1016/s0141-8130(99)00086-0.
Mature fruit of Chorisia speciosa yield an exudate (E-I) following mechanical injury. The polysaccharide contains rhamnose, arabinose, xylose, mannose, glucose, galactose and glucuronic acid in molar ratios of 20:11:1:3:2:40:23. The main chain of the structure is composed by beta-galactopyranosyl units linked (1 --> 3) and (1 --> 6) as indicated by NMR spectra and methylation data. Arabinosef and rhamnose are terminal residues. In order to compare E-I with the polysaccharides from the fruit mesocarp, the latter was submitted to different extractions. The water fraction contains rhamnose, arabinose, xylose, mannose, glucose, galactose and uronic acid in molar ratios of 18:4:1:2:3:44:28. It was treated with CTAB yielding a precipitate which was decomplexed with NaCl, giving four fractions. The fraction obtained using 0.15 M NaCl had a quantitative composition similar that of E-I.
美丽异木棉的成熟果实受到机械损伤后会产生一种渗出物（E-I）。该多糖含有鼠李糖、阿拉伯糖、木糖、甘露糖、葡萄糖、半乳糖和葡萄糖醛酸，其摩尔比为20:11:1:3:2:40:23。结构的主链由通过（1→3）和（1→6）连接的β-吡喃半乳糖基单元组成，这由核磁共振光谱和甲基化数据表明。阿拉伯糖和鼠李糖是末端残基。为了将E-I与果实中果皮的多糖进行比较，对后者进行了不同的提取。水相部分含有鼠李糖、阿拉伯糖、木糖、甘露糖、葡萄糖、半乳糖和糖醛酸，其摩尔比为18:4:1:2:3:44:28。用十六烷基三甲基溴化铵处理它，产生一种沉淀，该沉淀用氯化钠解络合，得到四个部分。使用0.15 M氯化钠得到的部分具有与E-I相似的定量组成。
