Biochemical potential and physiological response of Egyptian wheat genotypes to Drought stress

Hanafy, Ahmed; Allam, Mai; El-Soda, Mohamed; Esmail, R. M.; Ramadan, Walaa A.; Sakr, Mahmoud; Helmi, Radwa

doi:10.21608/ejchem.2022.162585.6972

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of the examined in the present study, a significant increase in the amount of total phenolics observed, under drought or/and head stress conditions. The capacity of durum wheat to increase total phenolic accumulation has been directly linked to increased tolerance to numerous stressors, including drought and heat stress [50,[90][91][92]. On the contrary, a reduction in total phenol concentration was reported in some previous research on the tolerance of wheat and maize genotypes to osmotic stress [93,94].…”

Section: Plos Onementioning

confidence: 99%

Genetic diversity of durum wheat (Triticum turgidum ssp. durum) to mitigate abiotic stress: Drought, heat, and their combination

Chaouachi,

Marín-Sanz,

Barro

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

Drought and heat are the main abiotic constraints affecting durum wheat production. This study aimed to screen for tolerance to drought, heat, and combined stresses in durum wheat, at the juvenile stage under controlled conditions. Five durum wheat genotypes, including four landraces and one improved genotype, were used to test their tolerance to abiotic stress. After 15 days of growing, treatments were applied as three drought levels (100, 50, and 25% field capacity (FC)), three heat stress levels (24, 30, and 35°C), and three combined treatments (100% FC at 24°C, 50% FC at 30°C and 25% FC at 35°C). The screening was performed using a set of morpho-physiological, and biochemical traits. The results showed that the tested stresses significantly affect all measured parameters. The dry matter content (DM) decreased by 37.1% under heat stress (35°C), by 37.3% under severe drought stress (25% FC), and by 53.2% under severe combined stress (25% FC at 35°C). Correlation analyses of drought and heat stress confirmed that aerial part length, dry matter content, hydrogen peroxide content, catalase, and Glutathione peroxidase activities could be efficient screening criteria for both stresses. The principal component analysis (PCA) showed that only the landrace Aouija tolerated the three studied stresses, while Biskri and Hedhba genotypes were tolerant to drought and heat stresses and showed the same sensitivity under combined stress. Nevertheless, improved genotype Karim and the landrace Hmira were the most affected genotypes by drought, against a minimum growth for the Hmira genotype under heat stress. The results showed that combined drought and heat stresses had a more pronounced impact than simple effects. In addition, the tolerance of durum wheat to drought and heat stresses involves several adjustments of morpho-physiological and biochemical responses, which are proportional to the stress intensity.

show abstract