Root-mediated allelopathic interference of bhringraj (Eclipta alba L.) Hassk. on peanut (Arachis hypogaea) and mung bean (Vigna radiata) |
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| Institution: | 1. Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, Malaysia;2. Department of Soil and Water, Salahaddin University-Erbil, Kurdistan Region, Iraq;3. Environmental Forensics Research Centre, Faculty of Environmental Studies, Universiti Putra Malaysia, Malaysia;4. Department of Agricultural Education, Zamfara State College of Education, 1002, Maru, Nigeria;1. Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, USA;2. Department of Biological Sciences, Michigan Technological University, Houghton, MI, USA;1. Department of Agronomy, University of Agriculture, Faisalabad, Pakistan;2. Department of Agronomy, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Pakistan;3. Punjab Agricultural University, Ludhiana 141004, India;4. Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Toowoomba 4350, Queensland, Australia |
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| Abstract: | The root mediated allelopathic interference of Eclipta alba infested soil on growth, physiological parameters and antioxidant enzyme activity was conducted on Arachis hypogaea L. and vigna radiata L. It was found that rhizosphere soil significantly reduced the germination percentage, seedling growth and dry biomass depending upon the species sensitivity. The germination inhibition was correlated with membrane deterioration as proved by a strong electrolyte leakage, increase in malondialdehyde (MDA) and H2O2 content. The physiological parameters like chlorophyll content, photosynthetic rate (Pn), intercellular CO2 concentration (Ci), stomatal conductance (Gs), and transpiration (E) also showed significant reduction in E. alba infested soil and non-significant increase in leaf temperature (Lt) of two test species. The test seedlings have circumvented the allelochemicals stress, by both significant decrease and non-significant increase in the antioxidant activities in E. alba infested soil in contrast to control soil. Rhizosphere soil contained significantly higher amount of water-soluble phenolics as the putative allelochemicals, which were vanillic acid, benzoic acid, ferulic acid, and p-coumaric acid. The study concluded that rhizosphere soil exerts an allelopathic influence on peanut and mung bean by releasing water soluble phenolic acids as putative allelochemicals in soil. |
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| Keywords: | Growth reduction Chlorophyll content Physiological characters Antioxidant enzymes and phenolic acids |
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