The mystery of underground death: cell death in roots during ontogeny and in response to environmental factors

Plant Biology
A Bagniewska-Zadworna, M Arasimowicz-Jelonek

Abstract

Programmed cell death (PCD) is an essential part of the ontogeny of roots and their tolerance/resistance mechanisms, allowing adaptation and growth under adverse conditions. It occurs not only at the cellular and subcellular level, but also at the levels of tissues, organs and even whole plants. This process involves a wide spectrum of mechanisms, from signalling and the expression of specific genes to the degradation of cellular structures. The major goals of this review were to broaden current knowledge about PCD processes in roots, and to identify mechanisms associated with both developmental and stress-associated cell death in roots. Vacuolar cell death, when cell contents are removed by a combination of an autophagy-associated process and the release of hydrolases from a collapsed vacuole, is responsible for programming self-destruction. Regardless of the conditions and factors inducing PCD, its subcellular events usually include the accumulation of autophagosome-like structures, and the formation of massive lytic compartments. In some cases these are followed by the nuclear changes of chromatin condensation and DNA fragmentation. Tonoplast disruption and vacuole implosion occur very rapidly, are irreversible and constitut...Continue Reading

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Citations

Nov 28, 2017·Plant Biology·N WojciechowskaA Bagniewska-Zadworna
Aug 28, 2019·Planta·Natalia WojciechowskaAgnieszka Bagniewska-Zadworna
Mar 14, 2019·Plants·Ioannis-Dimosthenis S Adamakis, Eleftherios P Eleftheriou
Jun 30, 2021·Planta·Natalia WojciechowskaAgnieszka Bagniewska-Zadworna

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