Programmed cell death: similarities and differences in animals and plants. A flower paradigm |
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Authors: | M Della Mea D Serafini-Fracassini S Del Duca |
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Institution: | (1) Dipartimento di Biologia, Università degli Studi di Bologna, Bologna, Italy |
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Abstract: | Summary. After an overview of the criteria for the definition of cell death in the animal cell and of its different types of death,
a comparative analysis of PCD in the plant cell is reported. The cytological characteristics of the plant cell undergoing
PCD are described.
The role of plant hormones and growth factors in the regulation of this event is discussed with particular emphasis on PCD
activation or prevention by polyamine treatment (doses, timing and developmental stage of the organism) in a Developmental
cell death plant model: the Nicotiana tabacum (tobacco) flower corolla. Some of the effects of polyamines might be mediated by transglutaminase catalysis. The activity
of this enzyme was examined in different parts of the corolla during its life span showing an acropetal trend parallel to
the cell death wave. The location of transglutaminase in some sub-cellular compartments suggests that it exerts different
functions in the corolla DCD. |
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Keywords: | : Programmed cell death – Polyamines – Transglutaminase – Flower – Cell wall – Tobacco |
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