Effects of high temperatures and drought during anthesis and grain filling period on wheat processing quality and underlying gluten structural changes

Abstract

Variability in wheat quality produced under different climatic conditions is mainly influenced by the production conditions, including their influence on ecosystem factors. The influence of wheat cultivar genetic predisposition is much less expressed. This indicates that differences among cultivars with different Glu-score might be diminished under the influence of altered production conditions, as a consequence of climate change. © 2017 Society of Chemical Industry.

Genome-wide association studies on heat stress tolerance during grain development in wheat (Triticum aestivum L.)

“…Protein and starch contents are important indices of wheat grain quality. The relative protein content and protein: starch ratio determine development time, strength, ductility, and food processing quality of flour and dough [36]. Our study detected an increase in GPC and a decrease in TSC, as well as a significant negative correlation between these traits (r=-0.77 ** ) under heat stress, reflecting a shortened grain-fill period and reduced starch content ( Fig.…”

Water and heat stresses during grain formation affect the physicochemical properties of waxy maize starch

“…Combined heat and water stress affects the grain yield and changes its quality. Drought affects grain protein accumulation and changes the gluten structure and the processing quality of wheat 9–13 . During wheat endosperm cell division, HD disrupts the cell divisions in peripheral and central endosperm and thus reduces the endosperm length and breadth, the pericarp thickness and endosperm size, and subsequently the mature grain weight 14 .…”

“…Drought affects grain protein accumulation and changes the gluten structure and the processing quality of wheat. [9][10][11][12][13] During wheat endosperm cell division, HD disrupts the cell divisions in peripheral and central endosperm and thus reduces the endosperm length and breadth, the pericarp thickness and endosperm size, and subsequently the mature grain weight. 14 Drought at post-anthesis stage decreases the activity of starch-synthesizing enzymes, thereby severely reducing starch accumulation 15,16 ; HD also substantially reduces the proportion of A-type starch granules (>9.9 μm) to B-type starch granules (<9.9 μm) compared with single-stress conditions (heat or drought) 17 and affects the flour viscosity of wheat cultivars, with greater influence in weak gluten cultivars than in strong ones.…”

Canopy warming accelerates development in soybean and maize, offsetting the delay in soybean reproductive development by elevated CO2concentrations

“…Moreover, growing season temperature can influence the progression of plant vegetative and reproductive developmental stages (e.g., Campbell & Norman, ). The significant changes in the global climate system that are looming have instigated investigation of the consequences of global warming on the physiology, growth, and yield of major food crops (e.g., Bishop, Leakey, & Ainsworth, ; Hatfield & Prueger, ; Mastilović et al, ; Obata et al, ; Ruiz‐Vera et al, ; Ruiz‐Vera, Siebers, Drag, Ort, & Bernacchi, ; Zhao et al, ). In‐field warming experiments have led to a better understanding of the plant physiological responses to temperature, but impacts of warming under field conditions on the progression through vegetative and reproductive growth stages are less well understood.…”