Translations:Benutzer:Arian/Klett-Mini-Test/1198/en

Evaluation on the basis of quantitative comparisons of material components is only conditionally possible without taking the time factor into account. What does a great quantity of a substance say — what does a small quantity say? The reference point for assessment must be sought in the processual activity within the plant with regard to an endpoint. This endpoint, in terms of nutritive value, is maturity. Toward this endpoint, build-up processes lead through continuous transformation of substance compositions; away from it, breakdown processes lead. Tracing both processes together first yields criteria for a reasonably secure quality statement. From the analysis of the build-up processes the concept of "ripening physiology" gains content. When the life processes come to rest in maturity — the enzymatic activities reduce themselves to a minimum — the optimal degree of quality is reached and a natural storage capacity, given for a certain period of time, is assured. But if the enzymes remain active in full ripeness, the fruit remains physiologically in a state of immaturity and is exposed to breakdown after a short time; its nutritive value must accordingly be rated as inferior.