The present invention provides a novel method of manufacturing germinated plant seeds suitable for producing a large amount of phytoalexin, a method of manufacturing raw material seeds for germination induction for use in manufacture of the above germinated plant seeds, an extract composition of the germinated plant seeds and a screening method for a plant seed candidate for use in producing a target substance. The method of manufacturing raw material seeds for germination induction comprises a pre-treatment step of maintaining plant seeds under atmosphere conditions of a carbon dioxide concentration of 400 ppm or more and/or an oxygen concentration of 19 vol% or less continuously for 5 hours or more. Alternatively, the method of manufacturing raw material seeds for germination induction comprises a pre-treatment step of treating plant seeds so that the mass of a phytochemical in the plant seeds after the pre-treatment step is 2 times or more relative to the mass of the phytochemical in the plant seeds before the pre-treatment step.
本发明提供了一种制造适合生产大量植物毒素的发芽植物种子的新方法、一种用于制造上述发芽植物种子的诱导发芽原料种子的制造方法、一种发芽植物种子的
提取物组合物以及一种用于生产目标物质的候选植物种子的筛选方法。制造用于诱导发芽的原料种子的方法包括一个预处理步骤,将植物种子在
二氧化碳浓度为 400 ppm 或更高和/或
氧气浓度为 19 vol% 或更低的大气条件下连续保持 5 小时或更长时间。或者,用于诱导发芽的原料种子的制造方法包括一个预处理步骤,即处理植物种子,使预处理步骤后植物种子中植物
化学物质的质量是预处理步骤前植物种子中植物
化学物质质量的 2 倍或以上。