Effect of indole-3-acetic acid on lead accumulation in maize (Zea mays L.) seedlings and the relevant antioxidant response
By Huanhuan Wang, X. Shan, B. Wen, G. Owens, Jing Fang, Shuzhen Zhang. 2007
119 citations recorded by the source corpus.
The effect of indole-3-acetic acid (IAA) on lead (Pb) accumulation in maize (Zea mays L. cv. TY2) seedlings, and the responses of maize to Pb, IAA or Pb + IAA stress were investigated under hydroponic conditions. Exogenous IAA significantly increased Pb accumulation in roots, but significantly decreased Pb accumulation in shoots over the culture period of 5 days. Increased Pb uptake in maize roots partly took place through calcium and potassium channels, and also depended upon membrane potential. Lipid peroxidation in terms of malondialdehyde (MDA) content was enhanced, indicating that Pb and/or IAA caused oxidative stress in maize seedlings. Under stress conditions the antioxidant defense mechanism was activated. Some antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were up-regulated compared to the control. Pb, IAA or Pb + IAA treatments resulted in a general reduction of macro- and micronutrient contents, especially of K, Ca and Mn. Compared to a single Pb or IAA treatment, treatment with a combination of Pb + IAA induced more severe oxidative stress on maize roots and shoots as inferred from the higher observed MDA and lower nutrient contents. A Fourier transform infrared (FTIR) spectroscopic study indicated that Pb reacted with the carboxylic acid group of the IAA pyrrole cycle.
Subfields: Complementary and alternative medicine, Plant Science, Pollution
View Paper: https://www.semanticscholar.org/paper/769d2293fe9a7ea93f59ee605f69b71b796a97b8
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In Plant Science
Citations in the corpus
- Lead uptake, toxicity, and detoxification in plants. (2011, background): “When ROS forms exhaust cellular antioxidant reserves, they can rapidly attack and oxidize all types of biomolecules, such as nucleic acids, proteins, and lipids (Reddy et al. 2005; Clemens 2006; Hu et al. 2007; Wang et al. 2007; Yadav 2010).”
- Arbuscular Mycorrhizal Fungi as Potential Agents in Ameliorating Heavy Metal Stress in Plants (2020, background): “The pathways through which HMs enter the roots include H+ ATPase/pumps, which help in maintaining the negative potential across the epidermal membrane in the roots; HM ions present in the soil make their entry into the plant epidermis either through ion channels or as organic compounds formed after ”
- Lead Toxicity: Health Hazards, Influence on Food Chain, and Sustainable Remediation Approaches (2020, background): “However, Pb uptake is a non-selective phenomenon and is independent of the H+/ATPase pump [91].”