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首页> 外文会议>Proceedings of the First international conference of Asian Allelopathy Society >Effects of aqueous leaf extracts of Parthenium hysterophorus L. on growth, photosynthesis, nitrogen and phosphorus absorption, and antioxidant enzymes of wheat (Triticum aestivum)
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Effects of aqueous leaf extracts of Parthenium hysterophorus L. on growth, photosynthesis, nitrogen and phosphorus absorption, and antioxidant enzymes of wheat (Triticum aestivum)

机译：爬山虎叶片水提物对小麦（Triticum aestivum）生长，光合作用，氮和磷吸收及抗氧化酶的影响

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The study was conducted under greenhouse conditions to assess the allelopathic potential of PartheniuM hysterophorus L. on wheat growth, and to discuss its physiological and biochemical mechanism. The bioassay results showed that aqueous leaf extract of Parthenium hysterophorus L inhibited the wheat germination and seedling growth, and the inhibition action increased with the increase of aqueous extract concentration, with inhibition percentages of wheat seed germination, plant height and fresh weight being 18.2%, 28.8% and 51.4% compared to the control, respectively, at aqueous extract concentration 10% (w/v). At all aqueous extract concentrations, the net photosynthetic rate and stomatal conductance were significantly inhibited, contents of chlorophyll, carotenoid, and phosphorus were reduced, and the value of Chi a:b was decreased. At the same time, the nitrogen content and nitrate reductase activity were intensively increased. However, no significant change occurring in stomatal limitation value and intercellular CO2 concentration, except at aqueous extract concentration 10%, at which both of them were obviously inhibited. Glutamine synthetase activity declined at aqueous extract concentration 2% and 4%, but increased at 8% and 10%. Meanwhile, aqueous extract significantly increased the content of malondialdehyde and inhibited catalase activity, and puperoxide dismutase and peroxidase activities were declined enormously by 56.7% and 53.2% compared to the control respectively, at aqueous extract concentration 10%. The present study showed that Parthenium hysterophorus L. leaf exhibits negative allelopathic effects on wheat.
机译：该研究是在温室条件下进行的，目的是评估PartheniuM hysterophorus L.对小麦生长的化感潜力，并讨论其生理和生化机制。生物测定结果表明，党参L的水叶提取物抑制小麦发芽和幼苗生长，其抑制作用随水提取物浓度的增加而增加，抑制小麦种子发芽的百分率，株高和鲜重为18.2％，在水提取物浓度为10％（w / v）的情况下，与对照相比分别为28.8％和51.4％。在所有含水提取物浓度下，净光合速率和气孔导度均被显着抑制，叶绿素，类胡萝卜素和磷的含量降低，Chi a：b的值降低。同时，氮含量和硝酸还原酶活性被强烈提高。然而，除了在水提取物浓度为10％时，气孔极限值和细胞间CO2浓度均明显受到抑制，在气孔极限值和细胞间CO2浓度方面没有发生明显变化。谷氨酰胺合成酶活性在水提取物浓度为2％和4％时下降，但在8％和10％时上升。同时，水提取物浓度为10％时，水提取物显着增加了丙二醛的含量并抑制了过氧化氢酶的活性，与对照相比，过氧化物歧化酶和过氧化物酶的活性分别显着下降了56.7％和53.2％。本研究表明，Parthenium hysterophorus L.叶对小麦表现出负面化感作用。

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