高粱根系分泌物中发现的 sorgoleone 的植物毒性。
Phytotoxicity of sorgoleone found in grain Sorghum root exudates.
机构信息
Department of Biology University of South Dakota, 57069, Vermillion, South Dakota.
出版信息
J Chem Ecol. 1992 Jan;18(1):1-11. doi: 10.1007/BF00997160.
Root exudates ofSorghum bicolor consist primarily of a dihydroquinone that is quickly oxidized to ap-benzoquinone named sorgoleone. The aim of this investigation was to determine the potential activity of sorgoleone as an inhibitor of weed growth. Bioassays showed 125μM sorgoleone reduced radicle elongation ofEragrostis tef. In liquid culture, 50-μM sorgoleone treatments stunted the growth ofLemna minor. Over a 10-day treatment period, 10μM sorgoleone in the nutrient medium reduced the growth of all weed seedlings tested:Abutilon theophrasti, Datura stramonium, Amaranthus retroflexus, Setaria viridis, Digitaria sanguinalis, andEchinochloa crusgalli. These data show sorgoleone has biological activity at extremely low concentrations, suggesting a strong contribution toSorghum allelopathy.
高粱的根系分泌物主要由一种二氢醌组成，该二氢醌迅速氧化为一种名为高粱醇酮的对苯醌。本研究旨在确定高粱醇酮作为抑制杂草生长的潜在活性。生物测定表明，125μM 的高粱醇酮可抑制画眉草胚根伸长。在液体培养中，50μM 的高粱醇酮处理会抑制浮萍的生长。在 10 天的处理期内，营养培养基中 10μM 的高粱醇酮可降低所有测试的杂草幼苗的生长：苘麻、曼陀罗、反枝苋、狗尾草、节节草和稗草。这些数据表明，高粱醇酮在极低浓度下具有生物活性，这表明它对高粱化感作用有很大的贡献。
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