Lakshmeesha Thimappa Ramachandrappa, Kalagatur Naveen Kumar, Mudili Venkataramana, Mohan Chakrabhavi Dhananjaya, Rangappa Shobith, Prasad Bangari Daruka, Ashwini Bagepalli Shivaram, Hashem Abeer, Alqarawi Abdulaziz A, Malik Jahangir Ahmad, Abd Allah Elsayed Fathi, Gupta Vijai Kumar, Siddaiah Chandra Nayaka, Niranjana Siddapura Ramachandrappa
Department of Studies in Biotechnology, University of Mysore, Mysore, India.
Microbiology Division, Defence Food Research Laboratory, Mysore, India.
Front Microbiol. 2019 Jun 12;10:1244. doi: 10.3389/fmicb.2019.01244. eCollection 2019.
is a leading plant pathogen that causes Fusarium head blight, stalk rot, and Gibberella ear rot diseases in cereals and posing the immense threat to the microbiological safety of the food. Herein, we report the green synthesis of zinc oxide nanoparticles from (SaZnO NPs) flower bud extract by combustion method and investigated their application for controlling of growth and mycotoxins of . Formation of SaZnO NPs was confirmed by spectroscopic methods. The electron microscopic (SEM and TEM) analysis revealed the formation of triangular and hexagonal shaped SaZnO NPs with size range 30-40 nm. The synthesized SaZnO NPs reduced the growth and production of deoxynivalenol and zearalenone of in broth culture. Further analysis revealed that treatment of mycelia with SaZnO NPs resulted in the accumulation of ROS in the dose-dependent manner. Also, SaZnO NPs treatment enhanced lipid peroxidation, depleted ergosterol content, and caused detrimental damage to the membrane integrity of fungi. Moreover, SEM observations revealed that the presence of diverged micro-morphology (wrinkled, rough and shrank surface) in the macroconidia treated with SaZnO NPs. Taken together, SaZnO NPs may find a potential application in agriculture and food industries due to their potent antifungal activity.
是一种主要的植物病原体,可导致谷物中的镰刀菌穗腐病、茎腐病和赤霉穗腐病,并对食品的微生物安全构成巨大威胁。在此,我们报告了通过燃烧法从(SaZnO NPs)花芽提取物中绿色合成氧化锌纳米颗粒,并研究了它们在控制生长和霉菌毒素方面的应用。通过光谱方法证实了SaZnO NPs的形成。电子显微镜(SEM和TEM)分析显示形成了尺寸范围为30-40nm的三角形和六边形SaZnO NPs。合成的SaZnO NPs降低了肉汤培养物中脱氧雪腐镰刀菌烯醇和玉米赤霉烯酮的生长和产生。进一步分析表明,用SaZnO NPs处理菌丝体会导致ROS以剂量依赖的方式积累。此外,SaZnO NPs处理增强了脂质过氧化,耗尽了麦角固醇含量,并对真菌的膜完整性造成了有害损害。此外,SEM观察显示,用SaZnO NPs处理的大分生孢子中存在不同的微观形态(表面起皱、粗糙和收缩)。综上所述,由于其强大的抗真菌活性,SaZnO NPs可能在农业和食品工业中找到潜在应用。