Impact of nano-zinc-oxide as an alternative source of zinc in date palm culture media

• Published in: Plant cell, tissue and organ culture Vol. 150; no. 1; pp. 73 - 84
• Main Authors: Hassan, Mona M., Taha, Rania A., Abd El-Aziz, M. E., Shaaban, Esam A., Ibrahim, Eman A.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.07.2022; Springer Nature B.V
• Subjects: Antioxidants; Biomedical and Life Sciences; Callus; Culture media; Embryos; Life Sciences; Nanoparticles; Nanotechnology; Nutrients; Original Article; Plant Genetics and Genomics; Plant Pathology; Plant Physiology; Plant Sciences; Propagation; Tissue culture; Zinc oxide; Zinc oxides; Zinc sulfate; Nanoparticles; Zinc oxide; Enzyme activity; Somatic embryogenesis
• ISSN: 0167-6857; 1573-5044
• DOI: 10.1007/s11240-022-02235-2

Nanotechnology is a rapidly spreading field to be applied in agriculture. From all kinds of nutrients, zinc nanoparticles had a great interest in investigations due to its importance for plant as it involved in many growth processes. Presently, rare literature is available about nanoparticles effects on date palm in vitro propagation, especially zinc oxide nanoparticles (ZnO-NPs). Therefore, ZnO-NPs were used in this investigation to study their effect on different stages of date palm (cv. Khalas) somatic embryo protocol. Instead of zinc sulfate (ZnSo 4 ) in Murashige and Skooge medium (8.9 mg/l), lower concentrations of ZnO-NPs (0.2, 0.1, 0.05 and 0.025 mg/l) were added. Generally, results showed that ZnO-NPs accelerated superior values compared with ZnSo 4 , as a control treatment, at all stages of date palm tissue culture protocol. Lower concentrations of ZnO-NPs (0.025 and 0.05 mg/l) gave better values compared with higher concentrations (0.1 and 0.2 mg/l) in callus growth, globularization, embryo formation number, secondary embryo number and shoot length. Whereas, the highest concentration showed higher shoot number and rooted plantlet length. Antioxidants enzymes and ROS and their relations were identified in date palm leaflets. As we know it is the first investigation of ZnO-NPs and their morphological and biochemical effects on date palm in vitro culture. Key message This investigation is interested in studying the in vitro effect of zinc oxide nanoparticles (ZnO-NPs) on different stages of date palm somatic embryo protocol. It is supposed to be the first in this field.