Effect of drought on concentration of polyamines of new mutant lines of spring wheat

Abstract

Wheat (Triticum aestivum L.) is grown in many countries around the
world, its productivity is hampered due to a variety of abiotic stresses such
as drought, salinity, and heat, particularly in arid and semiarid regions of
the world. Of these, drought as complicated factor, is the major abiotic
stress that is regarded as highly deleterious to growth and productivity of
the wheat. Drought inhibits a variety of physiological processes in plants.
Drought continues to be an important challenge to agricultural researchers
and plant breeders. Drought is a major abiotic factor limiting the crops yield
grown more than one third of the arable land around the world. Polyamines
are endogenous plant growth promoters that affect a variety of physiological and metabolic functions, and they particularly involved in the flowering
process. Studies conducted with other crop plants indicated that there is
relationship between changes in polyamine content and drought tolerance.
However, no information exists regarding to polyamine content of wheat
under conditions of limited water supply. This study was aimed quantifying
the effect of drought on different classes of polyamine such as putrescine,
spermidine and spermine concentrationin the parent line Zhenis and M7mutant lines developed on its genetic basis using gamma radiation doses of 100
and 200 Gy resulting changes in their concentrations. The article presents
screening parent variety of spring wheat Zhenis and M7 mutant lines developed on its genetic basis using gamma radiation doses of 100 and 200 Gy on
polyamine content in plants grown under watered and drought condition.
The wheat mutant germplasm, grown under irrigation had 4 samples, which
are characterized by significantly increase in polyamines concentration. On
the genetic basis of varieties Zhenis gamma radiation dose of 100 Gy on the
basis of putrescine concentration have been identified two significant positive mutant linesunder drought conditions.
Key words: drought, polyamines, putrescine, spermidine, spermine,
wheat, mutant lines.