Department of Agronomy, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, 63100, Bahawalpur, Punjab, Pakistan.
Department of Agronomy, University of Agriculture Faisalabad, Faisalabad, Pakistan.
Environ Sci Pollut Res Int. 2018 Jun;25(18):18071-18080. doi: 10.1007/s11356-018-2043-x. Epub 2018 Apr 24.
Plants in Brassica genus have been found to possess strong allelopathic potential. They may inhibit seed germination and emergence of subsequent crops following them in a rotation system. Series of laboratory and greenhouse experiments were conducted to determine the allelopathic impacts of Brassica napus L. against mung bean. We studied (1) the effects of aqueous extract (5%) of different plant parts (root, stem, leaf, flower, and whole plant) of B. napus, (2) the effects of leaf and flower extracts of B. napus at 0, 1, 2, 3, and 4% concentrations, and (3) the effect of residues of different B. napus plant parts and decomposition periods (0, 7, 14, and 21 days) on germination and seedling growth of mung bean. Various types of phenolics including quercitin, chlorogenic acid, p-coumeric acid, m-coumaric acid, benzoic acid, caffeic acid, syringic acid, vanillic acid, ferulic acid, cinamic acid, and gallic acid were identified in plant parts of B. napus. Among aqueous extracts of various plant parts, leaf and flower were found to have stronger inhibitory effects on germination and seedling growth traits of mung bean, higher concentrations were more toxic. The decomposition period changed the phtotoxic effect of residues, more inhibitory effect was shown at 14 days decomposition while decomposition for 21 days reduced inhibitory effect. The more total water-soluble phenolic was found in 5% (w/v) aqueous extract and 5% (w/w) residues of B. napus flowers at 14 days of decomposition (89.80 and 10.47 mg L), respectively. The strong inhibitory effects of B. napus should be managed when followed in rotation.
芸薹属植物被发现具有很强的化感潜力。它们可能会抑制轮作系统中紧随其后的作物的种子发芽和出苗。进行了一系列实验室和温室实验，以确定油菜（Brassica napus L.）对绿豆的化感影响。我们研究了 (1) 油菜不同部位（根、茎、叶、花和整株植物）的水提物（5%）的影响，(2) 油菜叶和花提物在 0、1、2、3 和 4%浓度下的影响，以及 (3) 不同油菜植物部位残渣及其分解期（0、7、14 和 21 天）对绿豆发芽和幼苗生长的影响。油菜植物各部位鉴定出多种类型的酚类化合物，包括槲皮素、绿原酸、对香豆酸、间香豆酸、苯甲酸、咖啡酸、丁香酸、香草酸、阿魏酸、肉桂酸和没食子酸。在各种植物部位的水提物中，发现叶片和花朵对绿豆的发芽和幼苗生长特性具有更强的抑制作用，较高的浓度毒性更大。分解期改变了残渣的光毒性效应，在 14 天分解时表现出更强的抑制作用，而分解 21 天则降低了抑制作用。在 14 天分解时，油菜花朵的 5%（w/v）水提物和 5%（w/w）残渣中发现了更多的总水溶性酚（分别为 89.80 和 10.47 mg/L）。在轮作中应该注意油菜的这种强烈抑制作用。
