Nabi Ghulam, Anjum Tehmina, Aftab Zill-E-Huma, Rizwana Humaira, Akram Waheed
Department of Plant Pathology, Faculty of Agricultural Sciences University of the Punjab Lahore Pakistan.
Department of Botany and Microbiology, College of Science King Saud University Riyadh Saudi Arabia.
Food Sci Nutr. 2024 Jul 22;12(10):7379-7391. doi: 10.1002/fsn3.4297. eCollection 2024 Oct.
Fungal pathogens pose a persistent threat to crop plants, risking global food security. Anthracnose of sorghum caused by causes a considerable loss in sorghum production. This study aimed to manage the anthracnose disease in sorghum using green-synthesized TiO nanoparticles using pomegranate peel and to assess their impacts on the agroeconomic attributes of sorghum. Synthesized TiO nanoparticles showed strong dose-dependent antifungal activity against and significantly reduced mycelial radial growth, comparable to commercial fungicides. Foliar application of TiO at concentrations of 150 and 200 ppm reduced the disease index >60% in pot trials. Additionally, the effect of TiO NPs on the growth and yield of sorghum plants and the possible mechanism(s) behind the suppression of anthracnose disease were deciphered. TiO NPs also improved shoot and root length, biomass accumulation, penile size, number of grains, and grain weight in sorghum plants infected with . Application of TiO NPs significantly increased the content of defense-related biochemicals, including total phenolic contents, activities of defense-related enzymes (PO, PPO, and PAL), photosynthetic pigments (total chlorophyll contents and carotenoids), and total protein contents. Collectively, our study verified the potential of green-synthesized titanium dioxide nanoparticles to suppress anthracnose disease by activating a defense system and stimulating growth and yield promotion under pathogen stress.
真菌病原体对农作物构成持续威胁，危及全球粮食安全。由[未提及病原体名称]引起的高粱炭疽病导致高粱产量大幅损失。本研究旨在利用石榴皮绿色合成的二氧化钛纳米颗粒来防治高粱炭疽病，并评估其对高粱农业经济属性的影响。合成的二氧化钛纳米颗粒对[未提及病原体名称]表现出强烈的剂量依赖性抗真菌活性，并显著降低了菌丝径向生长，与商业杀菌剂相当。在盆栽试验中，以150和200 ppm浓度叶面喷施二氧化钛可使病情指数降低>60%。此外，还解读了二氧化钛纳米颗粒对高粱植株生长和产量的影响以及抑制炭疽病背后的可能机制。二氧化钛纳米颗粒还改善了感染[未提及病原体名称]的高粱植株的地上部和根长、生物量积累、穗大小、粒数和粒重。施用二氧化钛纳米颗粒显著增加了与防御相关的生化物质含量，包括总酚含量、防御相关酶（过氧化物酶、多酚氧化酶和苯丙氨酸解氨酶）的活性、光合色素（总叶绿素含量和类胡萝卜素）以及总蛋白含量。总体而言，我们的研究证实了绿色合成的二氧化钛纳米颗粒通过激活防御系统以及在病原体胁迫下刺激生长和促进产量来抑制炭疽病的潜力。
