Enhanced plant growth promoting role of phycomolecules coated zinc oxide nanoparticles with P supplementation in cotton (Gossypium hirsutum L.)

This report focuses on application of zinc oxide nanoparticles (ZnONPs) carrying phycomolecule ligands as a novel plant growth promoter aimed at increasing the crop productivity. The present investigation examined the effect of ZnONPs on plant growth characteristics, and associated biochemical chang...

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Bibliographic Details
Published in:Plant physiology and biochemistry 2017-01, Vol.110, p.118-127
Main Authors: Venkatachalam, P., Priyanka, N., Manikandan, K., Ganeshbabu, I., Indiraarulselvi, P., Geetha, N., Muralikrishna, K., Bhattacharya, R.C., Tiwari, M., Sharma, N., Sahi, S.V.
Format: Article
Language:English
Subjects:
Antioxidant defense enzymes
Biomass
Carotenoids - metabolism
Catalase - metabolism
Chlorophyll - metabolism
Cotton
Dose-Response Relationship, Drug
Gossypium - drug effects
Gossypium - growth & development
Gossypium - metabolism
Gossypium hirsutum
Hydroponics - methods
Malondialdehyde - metabolism
Meristem - drug effects
Meristem - growth & development
Meristem - metabolism
Metal Nanoparticles - administration & dosage
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Microscopy, Electron, Scanning
Nanoparticles
Peroxidase - metabolism
Phosphorus - chemistry
Phosphorus - pharmacology
Phycomolecules
Plant growth promoting compounds
Plant Proteins - metabolism
Spectrometry, X-Ray Emission
Spectroscopy, Fourier Transform Infrared
Superoxide Dismutase - metabolism
Surface Properties
X-Ray Diffraction
Zinc Oxide - chemistry
Zinc Oxide - pharmacology
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Summary:This report focuses on application of zinc oxide nanoparticles (ZnONPs) carrying phycomolecule ligands as a novel plant growth promoter aimed at increasing the crop productivity. The present investigation examined the effect of ZnONPs on plant growth characteristics, and associated biochemical changes in cotton (Gossypium hirsutum L.) following growth in a range of concentrations (25–200 mg L−l ZnONPs) in combination with 100 mM P in a hydroponic system. Treated plants registered an increase in growth and total biomass by 130.6% and 131%, respectively, over control. Results demonstrated a significant increase in the level of chlorophyll a (141.6%), b (134.7%), carotenoids (138.6%), and total soluble protein contents (179.4%); at the same time, a significant reduction (68%) in the level of malondialdehyde (MDA) in leaves with respect to control. Interestingly, a significant increase in superoxide dismutase (SOD, 264.2%), and peroxidase (POX, 182.8%) enzyme activities followed by a decrease in the catalase (CAT) activity, in response to above treatments. These results suggest that bioengineered ZnONPs interact with meristematic cells triggering biochemical pathways conducive to an accumulation of biomass. Further investigations will map out the mode of action involved in growth promotion. •This study describes the role of zinc oxide nanoparticles (ZnONPs) as a novel growth stimulating agent.•Addition of bioengineered ZnONPs with P supplementation increased biomass, photosynthetic pigments and proteins.•ZnONPs augmentation led to the decreased level of MDA, indicating dilution of membrane peroxidation activity.•Zinc nanomaterials exhibiting its protective role against oxidative damage by increase of SOD and POX activity.
ISSN:0981-9428
1873-2690
DOI:10.1016/j.plaphy.2016.09.004