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首页> 外文会议>2011 International Conference on Environmental, Biomedical and Biotechnology >Preliminary phytoconstituents screening of some weeds and their potential toxicity on rice variety- Tarom via decomposition bioassay
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Preliminary phytoconstituents screening of some weeds and their potential toxicity on rice variety- Tarom via decomposition bioassay

机译：通过分解生物测定法初步筛选一些杂草及其对水稻品种Tarom的潜在毒性

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The preliminary phytoconstituents screening of the mature root, stem and leaves of the dominance rice weeds like Cyperus difformis and Echinochloa crusgalli as well as second prominent weeds like Paspalum paspaloides and Sagittaria trifolia and their potential toxicity on local rice variety – Tarom was investigated in the paddy field of Babol (North of Iran) at 2010. Different phytochemicals like tannins, saponins, anthroquinones and terpenoides in water extract as well as flavonoids, glycoside and steroids in alcoholic extract are detected from some parts of these weeds. To evaluate the allelopathic effect of the various concentrations of the decomposed plant residue I.e. 2, 4, 8, 16, 32g/ 250g soil from selected weeds on the test crop, an experiment was conducted to form factorial examination in randomized of complete block design with three replications. This study indicated that seedling growth of Tarom variety was more hampered due to the various concentrations of Sagittaria trifolia except lowest concentration (2g) as compared with other studied weeds. The greatest inhibitory effect was found at the rate of 32g plant material in the soil about 55.99% over control. Unlike of seedling growth, seed germination of the test crop was more sensitive to decayed plant parts of Paspalum paspaloides than other selected weeds in all treatments. In general, seedling growth of the test crop was more hampered than seed germination. It might be due to the some allelochemicals which were present in the selected weeds and retards more seedling growth of the paddy seeds than seed germination.
机译：初步研究了优势稻草（如香附草和and草）以及次生杂草（如Paspalum paspaloides和Sagittaria trifolia）的成熟根，茎和叶的植物组成及其对当地水稻品种的潜在毒性–在水稻中研究了塔罗姆（Tarom）于2010年在伊朗北部的Babol田地发现。从这些杂草的某些部分检测到了不同的植物化学物质，如水提取物中的单宁，皂角苷，蒽醌和萜类化合物以及酒精提取物中的类黄酮，糖苷和类固醇。为了评估各种浓度的分解的植物残余物的化感作用，即从试验作物上选择的杂草中提取2、4、8、16、32g / 250g土壤，进行了一项实验，以随机抽样的形式进行因子分解法检查，该试验具有三个重复的完整块设计。这项研究表明，由于除了其他浓度的杂草最低浓度（2g）外，不同浓度的箭叶（Sagittaria trifolia）浓度不同，Tarom品种的幼苗生长受到更大的阻碍。发现最大的抑制作用是土壤中32g植物材料的比例超过对照约55.99％。与幼苗生长不同，在所有处理中，试验作物的种子发芽对Paspalum paspaloides的腐烂植物部分比其他选定的杂草更敏感。通常，受试作物的幼苗生长比种子发芽受到更大的阻碍。这可能是由于某些杂草中存在的某些化感物质导致的，与种子发芽相比，这种化学物质阻碍了水稻种子的幼苗生长。

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