Characterisation of the cell walls of loquat (Eriobotrya japonica L.) fruit tissues
Characterisation of the cell walls of loquat (Eriobotrya japonica L.) fruit tissues
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DOI：
10.1016/s0144-8617(97)00240-3
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发表时间：
1998-03-01
影响因子：
11.2
通讯作者：
Rossello, C
中科院分区：
文献类型：
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作者：
Femenia, A;Garcia-Conesa, M;Rossello, C
枇杷果实（Eriobotrya japonica L.）CV. Algor）被解剖以得到以下组织区：表皮或外果皮、果肉或中果皮、珠被（围绕种子子叶的薄层）、种皮、仁和毛状花托。醇不溶残渣（AIR），从所有这些组织被证明是免费的淀粉，除了枇杷仁，其中约34%的鲜重基础上的淀粉。分析空气中的水分，灰分，蛋白质，木质素和组分糖释放两个水解程序，这有助于区分糖从非纤维素多糖和纤维素。它们的主要成分多糖被推断为果胶多糖，因为所有AIR都非常富含糖，如糖醛酸、阿拉伯糖和半乳糖。果胶多糖占枇杷果肉细胞壁总多糖的70%以上。与果胶多糖相关的钙和镁的量的支化度，酯化度和重要的差异检测之间的果胶聚合物取决于枇杷组织区。这些组成和结构的差异可能与这些果胶聚合物在形成枇杷果实的组织中所起的作用有关。(C)1998爱思唯尔科技有限公司版权所有。
Loquat fruit (Eriobotrya japonica L. cv. Algor) was dissected to give the following tissue zones: epidermis or epicarp, flesh or mesocarp, integument (a thin layer surrounding thr: seed cotyledons), seed testa, kernel and hairy receptacle. The alcohol insoluble residues (AIRs) from all these tissues were proved to be free of starch, except loquat kernel which on a fresh weight basis contained about 34% of starch. AIRs were analysed for moisture, ashes, protein, lignin and the component sugars were released by two hydrolytic procedures which helped to distinguish the sugars from non-cellulosic polysaccharides and cellulose. Their major component polysaccharides were inferred to be pectic polysaccharides since all AIRs were very rich in sugars such as uronic acids, arabinose and galactose. Pectic polysaccharides contributed up to 70% of total cell wall polysaccharides in the edible flesh of the loquat fruit. Important differences in the degree of branching, degree of esterification and in the amounts of Ca and Mg associated with pectic polysaccharides were detected among pectic polymers depending on the loquat tissue zone. These compositional and structural differences may be related to the role that these pectic polymers play within the tissues which form the loquat fruit. (C) 1998 Elsevier Science Ltd. All rights reserved.