Administration - Research Publications

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Author: search.filters.author.Singh, H.P.Has files: No

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    Retraction notice to "Bioaccumulation and physiological responses to lead (Pb) in Chenopodium murale L."[YEESA(2018)83-90]
    (Academic Press, 2018) Sidhu, G.P.S.; Bali, A.S.; Bhardwaj, R.; Singh, H.P.; Batish, Daizy R.; Kohli, R.K.
    Available online This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Author Gagan Preet Singh. The corresponding author Gagan Preet Singh acknowledged Ravinder Kumar Kohli as one of the co-authors, whereas RK Kohli reported that he is neither the author nor part of the communication of this paper.
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    Phytotoxicity and cytotoxicity of Citrus aurantiifolia essential oil and its major constituents: Limonene and citral
    (Elsevier B.V., 2017) Fagodia, S.K.; Singh, H.P.; Batish, Daizy R.; Kohli, R.K.
    The essential oils are fast emerging as the source of natural herbicides owing to their environmentally benign properties. The focus of the present study, thus, was to investigate the phytotoxicity and cytotoxicity of Citrus aurantiifolia oil, and its major constituents-citral and limonene. C. aurantiifolia oil was selected due to its extreme commercialisation and safe nature. GC?MS analysis revealed that C. aurantiifolia oil is rich in monoterpenes (83.93%), with limonene (40.92%) and citral (27.46%) as the major compounds. Phytotoxicity was assessed against three agricultural weeds, Avena fatua, Echinochloa crus-galli and Phalaris minor, at concentration ranging from 0.10?1.50?mg/ml. Percent germination, IC50 value and seedling growth (root and coleoptile length) were significantly reduced in a dose-response manner. C. aurantiifolia oil, citral and limonene caused alteration in the cell cycle of Allium cepa root meristematic cells as evidenced by decrease in mitotic index (MI) and increase in chromosomal aberrations at progressive concentrations (0.01?0.10?mg/ml) and time periods (3?h and 24?h). Cytotoxic evaluation confirmed mitodepressive effect of the tested volatiles though the intensity was variable. Overall, citral was the most toxic followed by C. aurantiifolia oil and limonene. The significant phytotoxic activity of C. aurantiifolia oil and citral suggests the possibility of being developed into eco-friendly and acceptable products for weed management in agriculture system. ? 2017 Elsevier B.V.
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    Ethylenediamine disuccinic acid enhanced phytoextraction of nickel from contaminated soils using Coronopus didymus (L.) Sm.
    (Elsevier Ltd, 2018) Sidhu, G.P.S.; Bali, A.S.; Singh, H.P.; Batish, Daizy R.; Kohli, R.K.
    In a screenhouse, the applicability of biodegradable chelant ethylenediamine disuccinic acid (EDDS) to enhance Ni-phytoextraction by Coronopus didymus was tested for the first time. This study assayed the hypothesis based upon the role of EDDS on physiological and biochemical alterations and ameliorating phytoextraction capacity of C. didymus under nickel (Ni) stress. Pot experiments were conducted for 6 weeks and C. didymus plants were cultivated in soil artificially contaminated with 30, 50, and 70 mg kg?1 Ni treatments. Soil was amended with EDDS (2 mmol kg?1). Plants were harvested, 1 week after EDDS application. At 70 mg kg?1 Ni level, EDDS application dramatically enhanced the root and shoot Ni concentration from 665 and 644 to 1339 and 1338 mg kg?1, respectively. Combination of Ni + EDDS induced alterations in biochemical parameters of plants. EDDS addition posed pessimistic effects on growth, biomass, photosynthetic activity and protein content of the plants. Besides, application of EDDS stimulated the generation of superoxide anion, H2O2 content and MDA level. However, EDDS assisted mount in antioxidant activities (superoxide dismutase, catalase and glutathione peroxidase) considerably neutralised the toxicity induced by reactive oxygen species in plant tissues. The results revealed EDDS efficacy to ameliorate the performance of antioxidant enzymes and improved Ni translocation in plant tissues, thus strongly marked its affinity to be used together with C. didymus for Ni-phytoextraction. ? 2018 Elsevier Ltd