摘要
为了探索桃果实的贮藏品质,利用生物力学、核磁共振影像、理化检测等分析手段,以北方晚熟桃品种为试材,研究桃品种间和贮藏期间质地、水分和细胞壁组分之间的差异及相互关系。结果表明:硬度从大到小依次是‘蟠桃’‘青州蜜桃’‘中华寿桃’和‘肥城桃’,‘蟠桃’硬度大,T23弛豫时间长,水溶性果胶质量分数高,但纤维素质量分数低,而‘肥城桃’硬度最小,果胶、半纤维素和纤维素质量分数低,T23弛豫时间短,自由水较多。相关性分析显示,桃果肉硬度与T23、可溶性果胶、共价结合型果胶和半纤维素呈显著正相关,而粘附性与离子结合型果胶、半纤维素和纤维素呈显著负相关。T22与T20、T21和T23均呈显著正相关,T22与可溶性果胶和半纤维素显著正相关,T23与可溶性果胶、共价结合型果胶和半纤维素均呈显著正相关,桃品种间硬度的差异是细胞壁组分和水分共同起作用的结果。并且,通过贮藏试验进一步表明,‘肥城桃’果实硬度下降伴随着纤维素和半纤维素的降解,水溶性果胶显著增加,果实内紧密结合水(T20)逐渐消失,而自由水(T23和M23)显著增加。
The objective of this study is to investigate the storage quality of late-maturing peach varieties in the North areas of China.The difference and correlation between texture,water status and cell wall compositions were studied by texture profile analysis(TPA),nucleus magnetic resonance(NMR)and physiochemical method.The results showed that hardness values of four varieties were as follows‘Flat peach’>‘Qingzhou honey peach’>‘Zhonghuashou peach’>‘Feicheng peach’.‘Flat peach’had the highest hardness,long T23 relaxation time and water soluble pectin,and lowest cellulose mass fraction,while‘Feicheng peach’had the smallest hardness,low pectin,hemicellulose and cellulose mass fraction,short T23 relaxation time and high free water.Correlation analysis indicated there were significant correlation among hardness,T23 relaxation time,soluble pectin,covalent pectin and hemicellulose.Whereas negative correlation were found among the adhesive,ion pectin,hemicelluloses and cellulose.Significant positive correlation among T22,T20 T21 and T23 relaxation time were observed.T22 had significant positive correlation with soluble pectin and hemicellulose.T23 had significant positive correlation with soluble pectin,covalent pectin and hemicellulose.The hardness differences of different peach varieties were the consequence of cell wall compositions and water status together.Storage experiment further showed that the flesh hardness of‘Feicheng peach’decreased along with the degradation of cellulose and hemicellulose,water soluble pectin increased significantly,tightly bound water in fruit(T20)disappeared gradually,and free water(T23 and M23)increased significantly.The results provided the basis for the storage and preservation of late ripe peach in North China.
作者
彭勇
陈义伦
王庆国
石晶盈
彭福田
冀成法
张小燕
PENG Yong;CHEN Yilun;WANG Qingguo;SHI Jingying;PENG Futian;JI Chengfa;ZHANG Xiaoyan(College of Food Science and Engineering,Shandong Agricultural University,Key Laboratory of Food Processing Technology and Quality Control of Shandong Province,Tai’an Shandong 271018,China;College of Horticulture Science and Engineering,Shandong Agricultural University,Tai’an Shandong 271018,China;Shandong New Times Pharmaceutical Co.,Ltd,Linyi Shandong 273400,China)
出处
《西北农业学报》
CAS
CSCD
北大核心
2019年第11期1836-1844,共9页
Acta Agriculturae Boreali-occidentalis Sinica
基金
山东省自然科学基金(ZR2016CL19)
中国博士后科学基金(2016M592228)
山东省“双一流”奖补资金(SYT2017XTTD04).
关键词
桃
质地
核磁共振
细胞壁组分
Peach texture
Nuclear magnetic resonance
Cell wall components
