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Unformatted text preview: 0; Suprasanna et al., 2008). If mutated
cells survive in intrasomatic competition, they can
potentially be expressed in plants.
Gamma rays have been reported to affect the
morphology, anatomy, biochemistry, and physiology
of plants, resulting in changes in plant growth and
development. The lower regeneration response observed
in the present study could be attributed to the toxic
effect of gamma radiation (Suprasanna et al., 2008). The
ionizing irradiation causes extensive cell nuclear damage
and is responsible for the lethality. When a gamma ray
is absorbed by biological materials, it will interact with
atoms or molecules (particularly water) to produce free
radicals in cells, which attack nearby cells. These radicals
can modify different important compounds of the plant
cell, causing damage to plant cells. This effect of irradiation
is critical for vegetative cells, due to the fact that cytoplasm
contains around 80% water (Kovacs and Keresztes, 2002).
4.3. Postmutagenesis handling and modification of the
It should be taken into consideration that many other
factors affect plant responses after irradiation. Ther...
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This document was uploaded on 02/23/2014.
- Spring '14