School of Life Sciences, Department of Biotechnology, Vels University, Pallavarm, Chennai 600117, Tamilnadu, India.
Department of Biochemistry, Vivekanandha College of Arts & Sciences for Women, Elayampalayam, Tiruchengode 637205, Namakkal Dist., Tamilnadu, India.
Biomolecules. 2020 Mar 9;10(3):425. doi: 10.3390/biom10030425.
belonging to the Myrtaceae family was explored for the synthesis of zinc oxide nanoparticles and for biological applications. The aqueous extract of the synthesized zinc nanoparticles (ZnNPs) was characterized using UV-visible spectrophotometer, FTIR, SEM and TEM. The aqueous broth was observed to be an efficient reducing agent, leading to the rapid formation of ZnNPs of varied shapes with sizes ranging between 52-70 nm. In addition, antifungal activity of the biosynthesized ZnNPs was evaluated against major phytopathogens of apple orchards. At 100 ppm of ZnNPs, the fungal growth inhibition rate was found to be 76.7% for followed by 65.4 and 55.2% inhibition rate for and , respectively. The microscopic observations of the treated fungal plates revealed that ZnNPs damages the topography of the fungal hyphal layers leading to a reduced contraction of hyphae. This considerable fungicidal property of ZnNPs against phytopathogenic fungi can have a tremendous impact on exploitation of ZnNPs for fungal pest management and ensure protection in fruit crops.
从桃金娘科（Myrtaceae）植物中提取的物质被用来合成氧化锌纳米粒子，并研究其在生物方面的应用。采用紫外-可见分光光度计、傅里叶变换红外光谱仪、扫描电子显微镜和透射电子显微镜对合成的氧化锌纳米粒子（ZnNPs）的水提取物进行了表征。结果表明，水相体系是一种有效的还原剂，能够快速形成具有 52-70nm 尺寸的不同形貌的 ZnNPs。此外，还评估了生物合成的 ZnNPs 对苹果园中主要植物病原菌的抗真菌活性。在 100ppm 的 ZnNPs 浓度下，对 的抑菌率为 76.7%，对 和 的抑菌率分别为 65.4%和 55.2%。对处理过的真菌平板的显微镜观察表明，ZnNPs 破坏了真菌菌丝层的形貌，导致菌丝的收缩减少。ZnNPs 对植物病原菌真菌具有很强的杀菌作用，这一特性可极大地促进 ZnNPs 在真菌防治和水果作物保护方面的应用。
