Broadleaf weeds are very costly for crop growers. Additional herbicidal compounds need to be obtained, especially from natural sources. Extracts of Icacina trichantha were evaluated for responses in germinating seeds and seedlings of rice (Oryza sativa) and Arabidopsis (Arabidopsis thaliana). An ethyl acetate fraction of I. trichantha tuber and a diterpenoid constituent, icacinol (1), were found to have impacts on germination and growth of seedlings. The seed germination inhibitory activity on rice was minimal, but significant on Arabidopsis. While rice indicated some growth delay in leaf expansion in the presence of 1, the effects appeared temporary; chlorophyll and anthocyanins were not significantly altered compared to DMSO controls. Rice seedlings attained biomass similar to DMSO controls, and rice grains per panicle were not significantly different from the DMSO controls. On the other hand, Arabidopsis exhibited damage to leaf expansion, reduced chlorophyll, and increased anthocyanins in aerial portions of the seedlings. Icacinol (1) may be a suitable chemical agent to investigate further for the treatment of eudicot weeds.

中文翻译：

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沙加依卡那豆中的伊卡素醇对水稻和拟南芥幼苗生长的活性

阔叶杂草对农作物种植者来说是非常昂贵的。需要获得额外的除草化合物，尤其是从天然来源获得。评价了三叶蝉（Icacina trichantha）提取物对水稻（Oryza sativa）和拟南芥（Arabidopsis thaliana）的种子和幼苗发芽的响应。的乙酸乙酯馏分I. trichantha块茎和二萜类成分，icacinol（1），被发现有对发芽和幼苗生长的影响。在水稻上的种子发芽抑制活性很小，但在拟南芥上却很显着。当1存在时，大米表明叶片扩展有些延迟。，效果似乎是暂时的；与DMSO对照相比，叶绿素和花色苷没有显着改变。水稻幼苗获得的生物量与DMSO对照相似，每穗的米粒与DMSO对照无显着差异。另一方面，拟南芥在幼苗的空中部分显示出对叶片膨胀的损害，叶绿素的减少和花色苷的增加。伊卡西诺（1）可能是合适的化学试剂，可用于进一步研究杜鹃花杂草的治疗。