Abstract Wheat, triticale and common bean are planted in both irrigated and rainfed conditions and may suffer the effects of water stress in both situations. The objective of this work was to evaluate the effect of water stress on the physical and chemical qualities of wheat (Triticum aestivum), triticale (Triticosecale wittmack) and common bean (Phaseolus vulgaris L.) grains. The experiment was conducted at the Embrapa Cerrados experimental station, in Planaltina, DF, Brazil. The experimental design was in randomized blocks with four replications. The treatments were composed of four water regimes (187 mm, 304 mm, 410 mm, 535 mm) applied to common bean (BRS Realce), two wheat genotypes (CPAC 0544 and BRS 404) and triticale (BRS Ulisses). The physical quality of grains was evaluated by the weight of a thousand grains (WTG) and color of the grains (represented by the luminosity (L*), chroma (C*) and hue angle (h*); the chemical quality was determined by protein, carbohydrate, lipid, ash, macro and microminerals contents. Water stress reduced grain yield of all species, however it did not reduce the weight of one thousand grains of the wheat genotype BRS 404, showing the potential of this cultivar, though it did lead to reduced WTG in common bean, triticale and the wheat genotype CPAC 0544. There was also a reduction of luminosity (L*) in the grains for both studied wheat genotypes, and chroma (C*) and hue angle (h*) for triticale. Water deficit also affected protein, carbohydrate, lipid and ash contents, with an increase in the protein content and a reduction in the carbohydrate and ash contents in common bean. In general, water stress reduced macro and micromineral contents in the grains, caused an undesirable change in the physical quality of the grains, and affected the chemical quality of the grains.

中文翻译：

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水分胁迫改变普通豆、黑小麦和小麦籽粒的理化品质

摘要 小麦、黑小麦和普通豆在灌溉和雨育条件下种植，在这两种情况下都可能受到水分胁迫的影响。这项工作的目的是评估水分胁迫对小麦 (Triticum aestivum)、小黑麦 (Triticosecale wittmack) 和普通豆 (Phaseolus vulgaris L.) 谷物理化品质的影响。该实验在巴西 DF 普拉纳尔蒂纳的 Embrapa Cerrados 实验站进行。实验设计为随机区组，重复四次。处理由应用于普通豆 (BRS Realce)、两种小麦基因型 (CPAC 0544 和 BRS 404) 和小黑麦 (BRS Ulisses) 的四种水分方案（187 毫米、304 毫米、410 毫米、535 毫米）组成。随着普通豆中蛋白质含量的增加和碳水化合物和灰分含量的减少。一般来说，水分胁迫降低了谷物中的宏观和微量矿物质含量，导致谷物物理质量发生不良变化，并影响谷物的化学质量。