Soybean [Glycine max (L.) Merr.] is an important source of health beneficial compounds, including tocopherols and lutein. Seeds with elevated concentrations of these health beneficial compounds may be required to meet the increasing needs of the functional food market. A study was conducted for a period of 11 years in Ottawa, ON, Canada to examine the relationship between temperature and precipitation during specific growth stage intervals (GSI) and the concentration of tocopherol (toc) and lutein in the seeds at harvest. Tocopherol concentrations in soybean were most influenced by air temperature changes, while lutein concentration was more sensitive to precipitation. Heat stress via the accumulation of temperatures greater than 31°C during the mid-vegetative to physiological maturity GSI was positively correlated (r² = 0.94) with α-toc concentration. Lutein concentration was negatively correlated (r² = 0.61) with mean cumulative precipitation (cppt) during the seed development to maturation GSI. Overall, reproductive stages were more responsive to climatic variables than vegetative stages. In addition, the cultivars with higher toc or lutein concentrations were less affected by climatic variables than cultivars with lower concentrations. Climatic factors and abiotic stress during specific growth stages may have significant impact on concentrations of health beneficial compounds in mature seeds and this should be considered in the production of soybean for the functional food market.

中文翻译：

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特定生长阶段的温度和降水会影响大豆生育酚和叶黄素的浓度

大豆 [甘氨酸最大值(L.) Merr.] 是有益健康的化合物的重要来源，包括生育酚和叶黄素。可能需要具有这些健康有益化合物浓度升高的种子来满足功能性食品市场日益增长的需求。在加拿大安大略省渥太华进行了一项为期 11 年的研究，以检查特定生长阶段间隔 (GSI) 期间温度与降水之间的关系以及收获时种子中生育酚 (toc) 和叶黄素的浓度。大豆中生育酚浓度受气温变化影响最大，而叶黄素浓度对降水更敏感。在营养中期到生理成熟期间，温度累积超过 31°C 的热应激与 GSI 呈正相关（r ² = 0.94) 与 α-toc 浓度。 从种子发育到成熟 GSI，叶黄素浓度与平均累积降水量 (cppt)呈负相关 ( r ² = 0.61)。总体而言，生殖阶段比营养阶段对气候变量更敏感。此外，与具有较低浓度的品种相比，具有较高 toc 或叶黄素浓度的品种受气候变量的影响较小。特定生长阶段的气候因素和非生物胁迫可能对成熟种子中有益健康的化合物的浓度产生显着影响，在为功能性食品市场生产大豆时应考虑到这一点。