Silicon enhances the growth of nickel-stressed cabbage plants by reducing oxidative damage and strengthening root architecture.

IF 3.4 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Rashad Mukhtar Balal, Muhammad Tauseef Jaffar, Syed Ayyaz Javed, Muhammad Zubair, Muhammad Ajmal Farhad, Hafiz Wasif Javaad, Muhammad Adnan Shahid, Waleed A A Alsakkaf, Hayssam M Ali
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Abstract

Nickel (Ni) toxicity can disorder plant growth and development, while silicon (Si) is important element in ameliorating heavy metal stress. This study investigated the effect of exogenous application of Si (2 mM) on cabbage plants exposed to Ni (0.5 mM and 1 mM). The impacts of exogenous Si application on root morphology, enzymatic activities, proline and glycine betaine (GB) accumulation, reactive oxygen species (ROS), and other physiological parameters of cabbage plants grown under Ni stress were observed. Exogenous Si mitigated the irreversible damage caused by Ni by improving root morphology, enhancing plant enzymatic activities, regulating osmoprotectants (proline and glycine betaine), modulating ROC (O2- and H2O2), and supporting overall plant physiology. Furthermore, Si reduced Ni content by 67% and 72% in roots and leaves, respectively, and improved the nutrients (Si, N, P, and K) upregulation under Ni stress while reducing oxidative stress. The overall findings suggest that foliar application of 2 mM Si can enhance root morphology, regulate nutrient uptake, and play a crucial role in reducing Ni accumulation. This effect is primarily attributed to its contribution to strengthening plant defense mechanisms against oxidative damage and regulating osmoregulation, thereby alleviating Ni-induced stress and promoting plant growth.

硅通过减少氧化损伤和加强根构型来促进镍胁迫白菜植株的生长。
镍(Ni)毒性会影响植物的生长发育,而硅(Si)是改善重金属胁迫的重要元素。研究了外源施用Si (2 mM)对Ni (0.5 mM和1 mM)胁迫下白菜植株的影响。观察了外源硅对Ni胁迫下白菜根系形态、酶活性、脯氨酸和甘氨酸甜菜碱(GB)积累、活性氧(ROS)等生理参数的影响。外源Si通过改善根系形态、增强植物酶活性、调节渗透保护剂(脯氨酸和甜菜碱)、调节ROC (O2-和H2O2)以及支持植物整体生理,减轻了Ni造成的不可逆损伤。此外,添加Si可使根和叶中Ni含量分别降低67%和72%,促进Ni胁迫下营养元素(Si、N、P和K)的上调,同时降低氧化应激。综上所述,叶面施2 mM Si可以改善根系形态,调节养分吸收,并对减少Ni积累起关键作用。其作用主要是通过增强植物对氧化损伤的防御机制,调节渗透调节,从而减轻ni诱导的胁迫,促进植物生长。
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来源期刊
International Journal of Phytoremediation
International Journal of Phytoremediation 环境科学-环境科学
CiteScore
7.60
自引率
5.40%
发文量
145
审稿时长
3.4 months
期刊介绍: The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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