The state of growing old; decay by time.
Nodules formed on the root of a host have a finite life span, usually 50-60 days. Plants can have several "crops" of nodules in a single growing season, and in leguminous trees current nodules may be at some distance from the stem. The breakdown of nodules over time is called senescence.
The aging process. Sometimes used to describe lakes or other bodies of water in advanced stages of eutrophication. Also used to describe plants and animals.
The aging and drying of leaves and nonbearing tillers.
aging and death, in this case it refers to the fall die back of the herbs and how the mass of the herbs decreases as they dry and shrivel. The drying and shriveling lead to loss of more than just water - cell walls are broken and plant material is leaches into the soil. Other material is translocated into the roots, stored for use in the next growing season.
the state of being old the process of becoming old
the postmaturational deteriorative changes occurring in organisms with increasing age
the organic process of growing older and showing the effects of increasing age
the property characteristic of old age
The age-related decline in somatic efficiency and effectiveness that afflicts individuals beginning at the usual age of first reproduction. According to evolutionary theory, senescence evolves in those organisms with an ontogenetic division between soma and germline. Senescence is the evolved late-life by-product of adaptations that enhance fitness in early-life. Senescence is not itself an adaptation. Much confusion now surrounds the term, largely owing to its misapplication to fundamentally non-senescent processes such as 'leaf senescence' in deciduous plants, and 'cellular senescence' in vertebrates. Both of these processes appear to have evolved as beneficial adaptations. The analogy to true senescence is therefore erroneous.
Sénescence Seneszenz, f Senescencia The aging process of plants. Also applied to the dying parts of a plant that is going dormant for the season.
aging, generally at a cellular level with the accumulation of various ageing effects. Cells no longer carrying out their differentiated function and begine to decline. In many cases cells can divide a limited number of times before they become senescent, while oncogenic (cancer) cells can "escape" senescence and become proliferative.
permanent arrest of cell division. This process has been thought to be involved in aging.
loss of function that accompanies aging.
The process of aging, decline and death.
senescere: to grow old] • Aging; deteriorative changes with aging; the increased probability of dying with increasing age.
the natural aging of a plant
The state or process of aging; derived from the Latin word senex, meaing "old man" or "old age."
The process of dying or going into dormancy.
The process of growing old
Period of the life span marked by changes in physical functioning associated with aging; begins at different ages for different people. (549)
the fundamental process of aging or aging itself. Can also refer to cellular aging in some contexts.
The act of reaching maturity or growing old.
Aging of tissues; growing old.
Decline or degeneration, as with maturation, age, or disease stress. ()
In biology, senescence is the combination of processes of deterioration which follow the period of development of an organism. For the science of the care of the elderly, see gerontology; for experimental gerontology, see life extension. The word senescence is derived from the Latin word senex, meaning "old man" or "old age."