SEASONAL TRENDS OF TITRATABLE ACIDS TANNINS AND POLYPHENOLIC COMPOUNDS AND CELL WALL CONSTITUENTS IN ORIENTAL PEAR FRUIT (PYRUS SEROTINA REHD)

被引：10

作者：

RYUGO, K

机构：

[1] Department of Pomology, University of California, Davis

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 1969年 / 17卷 / 01期

关键词：

D O I：

10.1021/jf60161a001

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Thirteen Pyrus serotina clones selected for differences in fruit size and texture were analyzed for titratable acidity, tannins and polyphenols, starch, and cell wall fractions. In clones which were relatively high in acid content at maturity, organic acids increased to a maximum level during the growing season and decreased as the fruits matured. A high correlation exists between the maximum amount accumulated and the acidity at harvest. Seasonal trends between total tannins and polyphenol content and lignin content in the cell wall were nearly parallel. Comparison between Loewenthal's volumetric method and Pro's colorimetric method indicated that the composition of the tannin complex changed with maturity. Except for one clone, a straight-line relationship was observed between lignin and cell wall content on a fresh weight basis as the fruits approached harvest. © 1969, American Chemical Society. All rights reserved.

引用

页码：43 / &

共 13 条

[1] Chemical studies in the physiology of apples. XII Ripening processes in the apple and the relation of time of gathering to the chemical changes in cold storage [J].