用牛磺酸为油菜籽打底,通过维持氧化还原平衡、离子平衡和光合效率来削弱铜的植物毒性效应

IF 3.4 3区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Sadia Zafar, Rizwan Rasheed, Umer Farooq, Muhammad Arslan Ashraf, Shafaqat Ali, Mohammed Ali Alshehri, Khalid A. Al-Ghanim, Pallab K. Sarker
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引用次数: 0

摘要

牛磺酸(TRN)具有抵御活性氧(ROS)的重要功能,可有效抑制生物膜中的脂质过氧化反应。此外,TRN 在渗透调节中也发挥着关键作用。然而,人们对 TRN 实现细胞平衡和氧化还原平衡、维持谷胱甘肽池和抑制铜的植物毒性作用的机制还缺乏了解。目前的研究旨在评估 TRN 种子诱导(0.5 和 1 mM)作为一种缓解方法对油菜(Brassica napus L.)植物铜胁迫(50、100 和 150 μM)植物毒性效应的影响。铜(Cu)毒性(50、100 和 150 μM)显著降低了植物的生长属性、光合系统效率、光合色素、叶片相对含水量和必需营养元素的获取。由于 ROS(过氧化氢和超氧自由基)、甲基乙二醛、脂氧合酶活性和脂质过氧化物明显增加,植物受到的氧化损伤加剧。在铜胁迫下,植物体内酶抗氧化剂的活性和非酶化合物的水平都有显著提高。牛磺酸通过促进抗氧化系统明显减轻了氧化损伤,并在增加硫化氢和一氧化氮含量的同时明显降低了甲基乙二醛的含量。接受 TRN 诱导的植物在气生部分的铜含量积累极少,这可能抑制了氧化应激。氧化应激的缓解明显改善了电子传递、光系统 II 的完整性和能量耗散机制。我们的研究最终表明,TRN-priming 是减轻铜毒性对油菜植物有害影响的有效策略。施用牛磺酸可减少氧化损伤和植物体内的铜积累,从而促进生长、叶绿素含量、ROS 代谢和甲基乙二酸解毒。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Seed Priming with Taurine Debilitates Copper Phytotoxic Effects by Maintaining Redox Balance, Ions Homeostasis and Photosynthetic Efficiency in Canola (Brassica napus L.)

Seed Priming with Taurine Debilitates Copper Phytotoxic Effects by Maintaining Redox Balance, Ions Homeostasis and Photosynthetic Efficiency in Canola (Brassica napus L.)

Taurine (TRN) plays a paramount function in protecting against reactive oxygen species (ROS), effectively curbing lipid peroxidation in biological membranes. Additionally, TRN plays a pivotal role in the osmoregulation. Nevertheless, there is a gap in understanding the mechanisms through which TRN brings cellular homeostasis and redox balance, upholds glutathione pool, and curtails copper phytotoxic effects. The current investigation was initiated to assess the impact of TRN seed priming (0.5 and 1 mM) as a mitigative approach to counteract the phytotoxic effects of copper stress (50, 100, and 150 μM) on canola (Brassica napus L.) plants. Copper (Cu) toxicity (50, 100, and 150 μM) notably subsided growth attributes, photosystem efficiency, photosynthetic pigments, leaf relative water content, and acquisition of essential nutrients in plants. Plants encountered increased oxidative injury due to a visible surge in ROS (hydrogen peroxide and superoxide radicals), methylglyoxal, lipoxygenase activity, and lipid peroxidation. A profound increase in the activities of enzymatic antioxidants and levels of non-enzymatic compounds was recorded in plants under Cu stress. Taurine priming significantly diminished oxidative injury by promoting the antioxidant system and visibly abated methylglyoxal levels alongside increasing hydrogen sulphide and nitric oxide content. Plants subjected to TRN-priming exhibited a minimal accumulation of Cu content in aerial parts that could have curbed oxidative stress. The mitigation of oxidative stress notably improves electron transport, photosystem II integrity, and energy dissipation mechanisms. Our study conclusively illustrates that TRN-priming is an efficacious strategy for alleviating the detrimental impacts of Cu toxicity on canola plants. Taurine application reduced oxidative damage and Cu buildup inside plant parts to promote growth, chlorophyll content, ROS metabolism, and methylglyoxal detoxification.

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来源期刊
Journal of Soil Science and Plant Nutrition
Journal of Soil Science and Plant Nutrition Agricultural and Biological Sciences-Soil Science
CiteScore
5.90
自引率
10.30%
发文量
331
审稿时长
9 months
期刊介绍: The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science. Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration. Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies. Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome. The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.
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