Evaluating the Regulation of Diamine Cadaverine Content as a Cold Stress Tolerance Index in Chickpea

Article Type:
Research/Original Article (دارای رتبه معتبر)

Metabolic adaptation to cold stress plays an important role in the growth, survival, and yield of crops. Diamine cadaverine (Cad) as an osmolyte may take part in counteracting the oxidative stress induced by cold stress in chickpea. In this experiment, content of hydrogen peroxide (H2O2), Cad, activity of diamine oxidase (DAO), and its relative gene expression (DAO) in cold-tolerant (Sel96th11439) and cold-sensitive (ILC533) chickpea (Cicer arietinum L.) genotypes under cold stress (4°C) as a factorial experiment in a completely randomized design (CRD) were studied. In tolerant genotype H2O2 content after a significant increase on the first day of cold stress decreased significantly on the sixth day of cold stress compared to control condition (up to 4.7%), while, its accumulation was observed in sensitive genotype (up to 50%). These results indicated a relative acclimation to cold stress in tolerant genotype. The Cad metabolite content (18 nmol/g FW) was observed under cold stress in tolerant genotype on the sixth day of stress. Under cold stress, in tolerant genotype increasing Cad content was accompanied with an increase in DAO activity and relative expression of DAO gene as biosynthetic pathways of this metabolite (up to 3.5- and 3-fold, respectively). The maximum activity of this route was observed in tolerant genotype on the sixth day of cold stress. In the late responses under cold stress, the accumulation of Cad in tolerant genotype led to reduced cell damage (H2O2 results) and improved cold tolerance. These indices were useful in assessment of chickpea genotypes under cold stress and breeding programs.

Iranian Journal of Field Crop Science, Volume:54 Issue: 3, 2023
149 to 161
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