کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5157474 1500602 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of tissue specific differences in cell wall polysaccharides of ripe and overripe pear fruit
ترجمه فارسی عنوان
مشخصه تفاوت های مشخصی بافت در پلی ساکارید دیواره سلولی میوه گلابی رسیده و مرطوب
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Cell walls from flesh, parenchyma cells, stone cells and skin were isolated from ripe and overripe Pyrus communis L. cv “De Cloche” using the phenol-buffer method. Pear polysaccharides were solubilized from cell walls by sequential extractions with aqueous solutions of ammonium oxalate, Na2CO3, and increasing concentration of NaOH, to explore overripening impact. Cell walls were also differentiated using MIR spectral data. Stone cells contained high levels of xylose and lignin while parenchyma cells had high levels of glucose, uronic acids and arabinose. Sequential extractions revealed that pear pectins had highly branched rhamnogalacturonans and were extremely methylated. Xylans were the main hemicelluloseespecially for stone cells. Cellulose represented about half of all cell walls. This heterogeneous composition of pear affected differently cell wall evolutions and properties. Thus, overripening involved a decrease in arabinose and a loss of pectic side chains mostly from parenchyma cells. Changes in hemicellulose and cellulose were minor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 156, 20 January 2017, Pages 152-164
نویسندگان
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