Department of Food Science and Experimental Nutrition, University of São Paulo, Av. Prof. Lineu Prestes, 580, Bloco 14, São Paulo, SP, 05508-000, Brazil.
Department of Botany & Plant Pathology, Purdue University, 915 West State Street, West Lafayette, IN 47907, USA.
Carbohydr Polym. 2017 May 15;164:31-41. doi: 10.1016/j.carbpol.2017.01.079. Epub 2017 Jan 22.
Banana (Musa acuminata and M. acuminata x M. balbisiana) fruit cell walls are rich in mannans, homogalacturonans and xylogalacturonan, rhamnogalacturonan-I, and arabinogalactans, certain forms of which is considered to have immunomodulatory activity. The cultivars Nanicão and Thap Maeo represent two widely variants with respect to compositional differences in the forms of these polysaccharides. Nanicão has low amounts of mannan in the water-insoluble and water-soluble fraction. Both cultivars have high amounts of water-soluble arabinogalactan. These commelinoid monocots lack the (1→3),(1→4)-β-d-glucans of grasses, but Thap Maeo has higher amounts of non-starch glucans associated with wild species than does Nanicão. High amount of callose was found in both cultivars. As immunomodulatory activity is associated with the fine structure and interaction of these polysaccharides, breeding programs to introgress disease resistance from wild species must account for these special structural features in retaining fruit quality and beneficial properties.
香蕉（Musa acuminata 和 M. acuminata x M. balbisiana）的果实细胞壁富含甘露聚糖、同质半乳糖醛酸聚糖和木半乳糖醛聚糖、鼠李半乳糖醛酸聚糖-I 和阿拉伯半乳聚糖，其中某些形式被认为具有免疫调节活性。品种 Nanicão 和 Thap Maeo 在这些多糖形式的组成差异方面代表了两种广泛的变体。Nanicão 在不溶性和水溶性部分的甘露聚糖含量较低。两个品种都有大量的水溶性阿拉伯半乳聚糖。这些 Commelinoid 单子叶植物缺乏草类的（1→3）、（1→4）-β-d-葡聚糖，但与 Nanicão 相比，Thap Maeo 与野生种相关的非淀粉葡聚糖含量更高。在两个品种中都发现了大量的 callose。由于免疫调节活性与这些多糖的精细结构和相互作用有关，因此从野生种中导入抗病性的育种计划必须考虑到这些特殊的结构特征，以保持果实的质量和有益特性。
