摘要
为探明小麦糊粉层细胞壁这种由阿拉伯木聚糖和β-(1-3)(1-4)葡聚糖组成的复合多层结构对水分的调控作用,研究了小麦糊粉层细胞壁结构对水分吸收速率、干燥速率和水分子移动性的调控作用。结果表明:通过环境扫描电镜(SEM)筛选出糊粉层最厚的周麦22和糊粉层最薄的中麦895,大麦和青稞作为对比,其中大麦细胞壁厚度是中麦细胞壁厚度的1. 49倍。通过比较周麦22、中麦895、大麦和青稞的糊粉层厚度与水分吸收速率、干燥速率的关系,说明了糊粉层细胞壁与吸水、干燥速率呈负相关。通过低场核磁共振检测发现:相同吸水条件下,糊粉层细胞壁越厚的样品其体内含水量越低但体内水分子的移动性越好;在干燥条件下,糊粉层细胞壁越厚的样品其体内含水量越高且水分子的移动性越好。因此,小麦糊粉层细胞壁结构对水分迁移具有显著调控作用。
To prove the adjustment and control effects of the wheat aleurone layer cell wall,composed multilayer structure,composed by araboxylan and beta-（1-3）（1-4） glucan,this paper studied the adjustment and control effects of the cell wall structure of the wheat aleurone layer,such as water absorption rate,drying rate and the mobility of water molecules. The results showed that： by environmental scanning electron microscopy（ SEM） to screen Zhoumai 22 with the thickest aleurone layer thickness and Zhongmai 895 with the thinnest aleurone layer,take the barley and highland barley for contrast,therein the thickness of barley cell wall was 1. 49 times as thickness of the zhongmai cell wall. By comparing the relationship among water absorption rate,drying rate and the aleurone layer thickness of Zhoumai 22,Zhongmai 895,barley and highland barley,found that there＇s a negative correlation among the aleurone layer cell wall,water absorption and drying rate. The low field nuclear magnetic resonance showed that under the same water absorption conditions,aleurone cell wall was thicker,the water content was lower but the mobility of water molecules in vivo was better; in dry conditions,the aleurone layer cell wall was thicker,the content of water was higher and the mobility of water molecules in vivo was better. Therefore,wheat aleurone cell wall structure has a significant role in the adjustment and control of water migration.
作者
李佟
应瑞峰
吴彩娥
李婷婷
范龚建
黄梅桂
Li Tong;Ying Ruifeng;Wu Caie;Li Tingting;Fan Gongjian;Huang Meigui(Co-Innovation Centre for the Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037;College of Light Industry Science and Food,Nanjing Forestry University,Nanjing 210037)
出处
《中国粮油学报》
EI
CAS
CSCD
北大核心
2018年第10期22-27,39,共7页
Journal of the Chinese Cereals and Oils Association
基金
国家自然科学基金(31600153)
