Changes in wheat protein aggregation during grain development: effects of temperatures and water stress

Daniel, Catherine; Triboı̈, E.

doi:10.1016/s1161-0301(01)00114-9

Cited by 113 publications

(72 citation statements)

References 17 publications

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“…At these stages, significant changes in the distribution of polymer size have been observed. The increase in the rate of large polymer formation coincides with an increment in the quantity of HMW-GS and LMW-GS subunits (Gupta et al, 1996;Daniel and Triboï, 2002;Rhazi et al, 2003). Daniel and Triboï (2002) showed that under water stress conditions, modifications in insolubilisation and oxidation properties appeared early.…”

Section: Discussionmentioning

confidence: 90%

Soil drying and rewatering applied at three grain developmental stages affect differentially growth and grain protein deposition in wheat (Triticum aestivum L.)

Beltrano

Ronco

Arango

2006

Braz. J. Plant Physiol.

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Water deficits cause large yield losses in wheat. Although anthesis is generally considered the most vulnerable period, water deficit during grain filling can also cause yield losses. The objective of this study was to investigate the effect of water stress and rewatering, at three different grain developmental stages, on physiological and grain filling parameters and on yield components. Wheat plants were subjected to water deficit and rewatering at the watery ripe, milk and soft dough stages. In the flag leaf, water stress decreased the relative water content, the chlorophyll and protein content and increased the leakage of solutes, at all three studied grain filling stages. Water stress at the watery ripe and milk stages reduced the final grain dry mass by 47 % and 20 %, respectively. This reduction was due to a decrease in the grain filling period and to a significant reduction in the maximum rate of grain-fill. Water stress imposed at the watery ripe stage reduced not only the linear growth phase but also its slope; grain number per spike and the 1000-kernel weight were also significantly reduced. SDS-PAGE patterns of grain proteins at the watery ripe stage did not differ between the controls, stressed or rewatered treatments. Protein patterns at the milk stage changed substantially with water stress, mainly for the high molecular weight glutenin subunits and ω gliadins. Three new bands were observed with apparent molecular weights of 108.5 kDa, 84.8 kDa and 63 kDa. Rewatering reverted water stress effects when it was imposed at the milk stage. Water deficit at the soft dough stage did not have any effect on protein grain patterns. Key words: grain filling, growth rate, logistic model, protein profile, water stress.O estresse hídrico e a reidrataçao aplicados em três estàgios de desenvolvimento dos gräos afetam diferentemente o crescimento e a deposiçao das proteinas dos gräos em trigo (Triticum aestivum L.): O estresse hídrico provoca na cultura do trigo grandes perdas de rendimento. Apesar da antese ser considerada, geralmente, a fase mais vulnerável, o déficit hídri-co durante todo o período de preenchimento também pode provocar perdas na produtividade da cultura. O objetivo do presente estudo foi pesquisar o efeito do estresse hídrico e da reidratação durante três estágios, no desenvolvimento do grão de trigo, sob diferentes parâmetros fisiológicos e do preenchimento dos grãos, e sob os componentes do rendimento. As plantas foram submetidas ao estresse hídrico e reidratação durante as fases de grão aquoso, leitoso e pastoso. O estresse hídri-co reduziu o conteúdo relativo d' água, o conteúdo da clorofila e das proteínas nas folhas bandeiras e aumentou a liberação dos solutos, nos três estádios do grão estudados. O estresse produzido durante os estádios aquoso e leitoso reduziu o peso final dos grãos em 47 % e 20 %, respectivamente. Essa redução foi devida a um encurtamento do período de preenchimento e a uma significativa diminuição na taxa máxima de preenchimento dos grãos. O estresse hídrico no estádi...

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Section: Discussionmentioning

confidence: 90%

Soil drying and rewatering applied at three grain developmental stages affect differentially growth and grain protein deposition in wheat (Triticum aestivum L.)

Beltrano

Ronco

Arango

2006

Braz. J. Plant Physiol.

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“…Moderately high (25-32°C) temperatures, however, had a positive effect on dough properties ) and led to modifications in the composition of the gliadin fraction (Daniel & Triboï 2002).…”

Section: Resultsmentioning

confidence: 99%

Quality of winter wheat in relation to heat and drought shock after anthesis

et al. 2011

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Balla K., Rakszegi M., Li Z., Békés F., Bencze S., Veisz O. (2011): Quality of winter wheat in relation to heat and drought shock after anthesis. Czech J. Food Sci., 29: 117-128.Raw material quality, which is influenced not only by the protein content, insoluble protein polymers, and gluteninto-gliadin ratio but also by the starch granule size, is very important for the quality of bakery products. This study investigated the effect of high temperature and drought (during grain-filling) on the quality and components yield of five winter wheat varieties. Drought and drought + heat were found to have a much greater influence on the yield and quality than heat stress alone. Averaged over the varieties, the yield losses were 57% after drought, 76% after drought + heat, and only 31% after heat stresses. The reductions in the unextractable polymeric protein fraction and glutenin-to-gliadin ratio indicated a poorer grain yield quality, despite the higher protein content. Quality deterioration was observed after drought or drought + heat, while high temperatures alone resulted in no change or in a better ratio of protein components. A significant negative correlation was observed between starch granule size and relative protein content after drought, demonstrating that this parameter contributes, together with protein, to the baking quality of the flour. Wheat varieties with satisfactory genetic traits are essential for the production of high quality wheat. Certain quality parameters vary over a very wide range in individual breeding lines. This broad genetic variability is demonstrated by the fact that the protein content ranges from 10-17%, the gluten content from 20-45%, the grain hardness from 10-85, the falling number from 60-450, and the farinograph index from C2 to A1. These differences in quality also depend on the soil, nutrient supplies, standard of plant protection, and other agronomic factors. The weather conditions during the growing season, especially the rainfall quantity and temperature, have a substantial influence on the plant metabolic processes, and thus on wheat quality.

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“…Little is known about grain development mechanisms that results in changes in composition and nutritional quality of grains [89]. Daniel and Triboi [90] used a modeling approach to quantify and compare the impact of heat and drought stress on protein aggregation during grain development in wheat in which rate and duration of protein accumulation were calculated as a function of thermal time. Their studies revealed the same effect of temperature and drought on grain weight and on the quality of nitrogen in grains.…”

Section: Effect Of Heat Stress On Plant Biochemistrymentioning

confidence: 99%

Impacts of Heat Stress on Wheat: A Critical Review

Iqbal¹,

Raja²,

Yasmeen³

et al. 2017

Adv Crop Sci Tech

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A brief review is given of investigations on stress-induced alterations in the yield of different biochemical contents in wheat. Wheat is major cereal crop for fulfilling the calories demands of growing population. Alterations in the worldwide climate are predicted to have critical sentence for crop production. Abiotic stresses such as heat and drought are major abiotic stresses restraining crop production. Heat stress reduces wheat growth by upsetting various physiological and biochemical processes and the developmental stage of the plant is critical in demonstrating the vulnerability of various species and cultivars subjected to high temperature. Heat stress did not affect the protein content but there is strong correlation between leaf nitrogen content and grain protein content. Induction of HSPs seems to be the universal response and adaptation to temperature stress. The synthesis of HSPs is believed to play significant role either in preventing or minimizing the adverse effects of high temperature both at molecular and cellular levels. Wheat has the tendency to adopt diverse types of responses to temperature stress as well as a heat shock by developing thermo-tolerance for the enhancement of the grain quality and yield.

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Changes in wheat protein aggregation during grain development: effects of temperatures and water stress

Cited by 113 publications

References 17 publications

Soil drying and rewatering applied at three grain developmental stages affect differentially growth and grain protein deposition in wheat (Triticum aestivum L.)

Soil drying and rewatering applied at three grain developmental stages affect differentially growth and grain protein deposition in wheat (Triticum aestivum L.)

Quality of winter wheat in relation to heat and drought shock after anthesis

Impacts of Heat Stress on Wheat: A Critical Review

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