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Functional Plant Biology Functional Plant Biology Society
Plant function and evolutionary biology
RESEARCH ARTICLE

Potassium silicate and zinc oxide nanoparticles modulate antioxidant system, membranous H+-ATPase and nitric oxide content in faba bean (Vicia faba) seedlings exposed to arsenic toxicity

Anis Ali Shah https://orcid.org/0000-0003-2071-9939 A * , Shakil Ahmed B , Aqsa Malik C , Kishwar Naheed B , Saber Hussain B , Nasim Ahmad Yasin D , Sumera Javad E , Manzer H. Siddiqui F * , Hayssam M. Ali F and Aamir Ali G
+ Author Affiliations
- Author Affiliations

A Department of Botany, Division of Science and Technology, University of Education, Lahore, Lahore, Pakistan.

B Institute of Botany, University of the Punjab, Lahore, Pakistan.

C Department of Botany, University of Narowal, Narowal, Pakistan.

D Senior Superintendent Garden, RO-II Office, University of the Punjab, Lahore, Pakistan.

E Department of Botany, Lahore College Women University, Lahore, Pakistan.

F Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

G Department of Botany, University of Sargodha, Sargodha, Pakistan.


Handling Editor: Suleyman Allakhverdiev

Functional Plant Biology - https://doi.org/10.1071/FP21301
Submitted: 12 October 2021  Accepted: 24 January 2022   Published online: 11 March 2022

© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Current research focused on the potential role of zinc oxide nanoparticles (ZnONPs) and potassium (K+) in mitigation of arsenic (As) toxicity in Vicia faba L. seedlings. Faba bean seedlings were grown for 30 days in potted soil. As stress curtailed root and shoot length, chlorophyll (Chl) content and net photosynthetic rate in V. faba seedlings. However, ZnONPs and K+ curtailed As stress in faba bean seedling through enhanced activity of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT) and peroxidase (POD) enzyme. Furthermore, ZnONPs and K+ significantly enhanced cysteine (Cys) content and serine acetyletransferase (SAT) activity in faba bean seedling exposed to As-toxificated soil. Application of ZnONPs and K+ curtailed superoxide ionic content and hydrogen peroxide (H2O2) accumulation in V. faba seedlings exposed to As-polluted soil. Nitric oxide (NO) content also increased in faba bean seedlings treated with ZnONPs and K+ in normal and As-polluted soil. As stress alleviation was credited to reduce As uptake in faba bean seedlings treated with synergistic application of ZnONPs and K+. It is proposed that K+ interaction with nanoparticles can be exploited at molecular level to understand the mechanisms involved in abiotic stress tolerance.

Keywords: arsenic, enzymes, faba bean, growth, potassium, stress, zinc oxide nanoparticles.


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