Pecto-cellulose

The cellular tissue of many fruits contains cellulose associated with other substances of the nature of carbohydrates. Apples, pears, and other fruits contain a substance called pecto-cellulose, which is probably a chemical compound of cellulose and pectin, as it gives cellulose and pectic acid on hydrolysis with an alkali. Pectin, which is a complex carbohydrate present in certain fruits, is converted into pectic acid when heated with a solution of an alkali. The formation of jellies from fruits is brought about as the result of the hydrolysis of the pectin which they contain. The hydrolysis converts pectin into pectic acid, which forms calcium pectate with the calcium salts always... 

Plant cell-walls are distinguished from animal cells by the presence, around the plasmalemma, of a wall within which complex physicochemical and enzymatic phenomena take place. In the course of cell growth, the dimensions of the cell-wall vary according to the types of macromolecules of which it is composed. The first wall deposited after cell division is called the middle lamella and is composed essentially of pectic material. The cell then lays down a wall composed of pecto-cellulosic material to supplant the middle lamella of the primary cell-wall (Fig. 2). 

CELLULOSE, one of the chief organic products of vegetation. The cell-wall of all young plants is made of cellulose in older cells other materials are incorporated, forming hemi-cellulose, ligno-cellulose, pecto-cellulose, and adipo-cellulose. 

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