Abstract
The study of leaf senescence is one of the major fields of plant physiology and has become a popular topic these days. It has one great advantage over the process in whole plants—namely, it is under direct control. With the whole plant, one has to wait until the end of the life cycle, which is practically impossible for perennials; but with leaves, we can rapidly induce senescence in a number of ways, and there is as yet no reason to think that such induced senescence differs in any way from the natural process. However, leaves suffer from different issues and obstacles, being bearers of photosynthetic apparatuses, and yet this is acceptable because it shows the promise of leading to a general concept of the nature of the senescence process in organs and tissues.
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