Abdelaziz Amer Morsy, Attia Mohamed S, Salem Marwa S, Refaay Dina A, Alhoqail Wardah A, Senousy Hoda H
Botany & Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt.
Botany & Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch), Cairo 11884, Egypt.
Plants (Basel). 2022 Aug 5;11(15):2049. doi: 10.3390/plants11152049.
Research in plant pathology has increasingly focused on developing environmentally friendly, effective strategies for controlling plant diseases. Cyanobacteria, including , , and , were applied to L. to induce immunity against wilt. Soil irrigation and foliar shoots (FS) application were used in this investigation. The disease symptoms, disease index, osmotic contents, total phenol, Malondialdehyde (MDA), hydrogen peroxide (HO), antioxidant enzymes (activity and isozymes), endogenous hormone content, and response to stimulation of defense resistance in infected plants were assessed. Results demonstrated that using all cyanobacterial aqueous extracts significantly reduced the risk of infection with . One of the most effective ways to combat the disease was through foliar spraying with , , and (which provided 95, 90, and 69% protection percent, respectively). All metabolic resistance indices increased significantly following the application of the cyanobacterial aqueous extracts. Growth, metabolic characteristics, and phenols increased due to the application of cyanobacteria. Polyphenol oxidase (PPO) and peroxidase (POD) expressions improved in response to cyanobacteria application. Furthermore, treatment by cyanobacteria enhanced salicylic acid (SA) and Indole-3-Acetic Acid (IAA) in the infected plants while decreasing Abscisic acid (ABA). The infected pepper plant recovered from wilt because cyanobacterial extract contained many biologically active compounds. The application of cyanobacteria through foliar spraying seems to be an effective approach to relieve the toxic influences of on infected pepper plants as green and alternative therapeutic nutrients of chemical fungicides.
植物病理学研究越来越注重开发环境友好、有效的植物病害防治策略。蓝藻，包括[具体种类未给出]、[具体种类未给出]和[具体种类未给出]，被应用于辣椒以诱导对青枯病的免疫力。本研究采用土壤灌溉和叶面喷施两种方式。评估了感染植株的病害症状、病情指数、渗透物质含量、总酚、丙二醛（MDA）、过氧化氢（H₂O₂）、抗氧化酶（活性和同工酶）、内源激素含量以及对防御抗性刺激的反应。结果表明，使用所有蓝藻水提取物均显著降低了感染[病原菌名称未给出]的风险。防治该病最有效的方法之一是叶面喷施[具体蓝藻种类未给出]、[具体蓝藻种类未给出]和[具体蓝藻种类未给出]（分别提供了95%、90%和69%的保护率）。施用蓝藻水提取物后，所有代谢抗性指标均显著增加。由于施用蓝藻，生长、代谢特征和酚类物质增加。多酚氧化酶（PPO）和过氧化物酶（POD）的表达因施用蓝藻而改善。此外，蓝藻处理增强了感染植株中的水杨酸（SA）和吲哚 - 3 - 乙酸（IAA）含量，同时降低了脱落酸（ABA）含量。感染青枯病的辣椒植株得以恢复，因为蓝藻提取物含有许多生物活性化合物。通过叶面喷施施用蓝藻似乎是一种有效的方法，可以减轻[病原菌名称未给出]对感染辣椒植株的毒性影响，作为化学杀菌剂的绿色替代治疗性养分。
