Velvetleaf (Abutilon theophrasti Medic), morning glory (Ipomoea purpurea [L.] Roth), and wild mustard (Brassica kaber [D.C.] L. C. Wheeler) seeds exhibited decreased germination with increased planting depth in soil. Flushing the soil for 2 minutes each day with air overcame the inhibition. A sealed in vitro system was used to sample the volatile components produced by weed seeds. Inhibition of seed germination was accompanied by decreased O2 levels and production of volatile metabolites identified as acetaldehyde, ethanol, and acetone. The effectiveness of these compounds in reducing germination was dependent on O2 levels.
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机译：Velvetleaf（Abutilon theophrasti Medic），牵牛花（Ipomoea purpurea [L.] Roth）和野芥菜（Brassica kaber [D.C.] L. C. Wheeler）种子的发芽减少，且在土壤中的播种深度增加。每天用空气冲洗土壤2分钟即可克服这种抑制作用。使用密封的体外系统对杂草种子产生的挥发性成分进行采样。抑制种子发芽的过程伴随着O2含量的降低以及挥发性代谢产物的产生，这些代谢产物被鉴定为乙醛，乙醇和丙酮。这些化合物减少发芽的效力取决于氧气水平。
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