Assessment of dimethoate and malathion mediated toxicity on Solanum lycopersicum L

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Debajyoti Behera, Kalpana Panigrahi, Jyoti Ranjan Rout
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引用次数: 0

Abstract

Nowadays organophosphate-based chemicals are most commonly used insecticides worldwide which are applicable to a wide range of crop plants. In this study, the effect of organophosphate insecticides, dimethoate (DM) and malathion (MT), was investigated on Solanum lycopersicum L. The seeds were germinated under in vivo conditions and after 1 month of germination, they were transferred to separate pots. Insecticides were applied in three different concentrations (X, 2X, and 4X) using a nozzle spray at 7-day intervals for 21 days where X was the recommended dose. After 21 days of treatment, the toxicological responses of plants were confirmed by evaluating the growth patterns, anatomical, photosynthetic pigments, expression of proteins, and antioxidant enzymes catalase (CAT), guaiacol peroxidase (GPX), and ascorbate peroxidase (APX). The study findings demonstrated that both DM and MT treatment resulted in adverse growth effects even at the initial recommended dose (X) of application. However, compared to MT, at 4X concentrations of DM, maximum decrease in plant height (43.43%), leaf length (43.16%), leaf width (41.09%), and total numbers of leaves per plant (50.57%) was observed. Plants subjected to higher doses of DM and MT showed a gradual reduction in chlorophyll a, chlorophyll b, total chlorophyll, and carotenoids (67.25, 50.00, 62.03, and 41.04%, respectively, for DM and 61.75, 55.72, 59.87, and 41.04%, respectively, for MT). In addition, higher doses of these insecticides greatly disturbed micromorphology and protein contents. At high dose (4X) of treatment, the activities of CAT, GPX, and APX were found to increase by 14.01, 3.62, and 2.21 times the control value, respectively, for DM and 5.17, 2.53, and 1.46 times, respectively, for MT. Additionally, increased isoenzymes of CAT, GPX, and APX were demonstrated by nondenaturing PAGE and were also dependent on the concentrations of DM and MT. These results suggest that the isoforms of the antioxidant enzymes newly developed due to DM and MT excess may be used as biochemical markers for other crop plants grown under insecticide stress. This study provides insights into the biochemical mechanism associated with the toxicity caused to plants by the test insecticides.

Graphical Abstract

乐果和马拉硫磷对番茄茄的毒性评价。
目前,有机磷农药是世界上最常用的杀虫剂,适用于多种作物。本研究研究了有机磷杀虫剂乐果(DM)和马拉硫磷(MT)对番茄茄(Solanum lycopersicum L.)的影响。种子在体内条件下发芽,发芽1个月后转移到不同的盆栽中。以三种不同浓度(X、2X和4X)的杀虫剂使用喷嘴喷雾,每隔7天喷洒一次,共21天,其中X为推荐剂量。处理21 d后,通过观察植物的生长形态、解剖结构、光合色素、蛋白质表达、过氧化氢酶(CAT)、愈创木酚过氧化物酶(GPX)和抗坏血酸过氧化物酶(APX)等抗氧化酶的变化,确定毒理学反应。研究结果表明,即使在初始推荐剂量(X)下,DM和MT治疗也会导致不良生长效应。但与MT相比,在4倍浓度DM处理下,株高、叶长、叶宽和单株总叶数的降幅最大,分别为43.43%、43.16%、41.09%和50.57%。DM和MT处理的植株叶绿素a、叶绿素b、总叶绿素和类胡萝卜素含量分别为67.25、50.00、62.03和41.04%,MT处理的叶绿素a、总叶绿素和类胡萝卜素含量分别为61.75、55.72、59.87和41.04%。此外,高剂量的杀虫剂极大地扰乱了微形态和蛋白质含量。在高剂量(4倍)处理下,DM组CAT、GPX、APX活性分别比对照增加14.01、3.62、2.21倍,MT组CAT、GPX、APX同工酶活性分别比对照增加5.17、2.53、1.46倍。这些结果表明,由于DM和MT过量而新产生的抗氧化酶异构体可以作为杀虫剂胁迫下其他作物的生化标记物。本研究为揭示试验杀虫剂对植物毒性的生化机制提供了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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