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pectic substances

A Dictionary of Biology | 2004 | 378 words | Copyright

pectic substances A group of polysaccharides made up primarily of sugar acids. They are important constituents of plant cell walls and the middle lamella between adjacent cell walls. Normally they are present in an insoluble form, but in ripening fruits and in tissues affected by certain diseases they change into a soluble form, which is evidenced by softening of the tissues.

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