The Effect of Drought Stress Treatment on Some Grain Quality Traits in Wheat (Triticum aestivum L.) Varieties

Abstract

Climate change imposes many environmental stresses out of which drought stress is a major concern that significantly restricts crop production in arid and semi-arid regions. The negative impact on grain quality caused by drought stress is responsible for reduced grain yield and quality. Many previous studies aimed to understand the tolerance level of wheat varieties, but studies on grain quality traits assessment were less. Therefore, the aim of the present investigation was to study some grain quality traits and to determine how drought stress affected these parameters. Experiments with two wheat varieties viz. WH 1105 and WH 1025 were conducted in microplots with RBD design in open fields. Grains were selected after harvest of the crop and were used to evaluate sedimentation value, β carotene, crude fibre, total sugars and starch. Sedimentation values (ml) were increased more in WH 1025 (6.9 per cent) than WH 1105 (3.8 per cent). Beta carotene content (µg g-1 DW), crude fibre (%), total sugar (%) and starch (%) contents were decreased in both wheat varieties and more decrease was observed in WH 1105 than WH 1025 under drought condition than irrigated condition. The study revealed that quality traits of WH 1105 were much affected than WH 1025 under drought stress.

Impact of Hydrogel and Its Relationship to Yield, some of Its Components and Grain Quality of Bread Wheat Genotypes (Triticum aestivum L.)

“…This result agrees with what was mentioned by [49], which indicated that if the wheat crop is exposed to drought and high temperatures, this leads to the appearance of shrunken and wrinkled grains with low specific weights, and thus leads to a decrease in the percentage of flour extraction. These results agreed with [50,51], who indicated that drought stress affects the decrease in specific weight of wheat grain. As for the effect of adding the hydrogel and non-adding it, the results and the arithmetic averages ( Table 5) showed that there were significant differences in the specific weight characteristic, as the treatment of adding the hydrogel achieved a significant superiority at a rate of (80.4 kg.hl -1 ) and an increase of (5.5%) , while the treatment of not adding hydrogels recorded an average of (75.9 kg.hl -1 ).…”

Impact of Titanium-Dioxide and Zinc-Oxide Nanoparticles in Improving Wheat Productivity Under Water Stress Conditions

“…Haji et al (2020) documented a progressive correlation between grain protein content and dry and wet gluten content. Generally, significant increases in Zeleny sedimentation index, wet and dry gluten contents, and gluten index showed following stress (Rao et al, 2021).…”

“…Several authors recommended that the increase in grain protein percentage due to drought stress in wheat grains may ascribe to reduced starch accumulation (Rao et al, 2021). These effects had a decline in the grain yield and the thousand-kernel weight accompanying them.…”

“…Modifications in the precipitation quantities, intensity, and patterns retard wheat growth and productivity under such conditions. Thus, evaluating water shortage outcomes through different wheat growth developmental stages for grain yield and quality attributes has real value (Rao et al, 2021). With the predicted climate variation, reductions and impacts on food security will increase water resource competition between different categories (Rady et al, 2020).…”