Sun Yi-Fan, Liu Zhe, Li Hai-Yang, Zheng Ze-Hao, Ji Cheng-Long, Guo Qiao, Lai Hang-Xian
College of Natural Resources and Environment, Northwest A&F university, Yangling 712100, Shaanxi, China.
Ying Yong Sheng Tai Xue Bao. 2021 Jan;32(1):299-308. doi: 10.13287/j.1001-9332.202101.036.
Bl13 has good antagonistic effect on the pathogen of tomato early blight (TEB) disease. A pot experiment was conducted to investigate the effect and mechanism of Bl13 against TEB disease by measuring biological traits such as plant height, stem diameter, disease index of TEB, activity of plant defense enzyme in leaves, and microbial diversity and community composition in root area. The results showed that Bl13 could significantly reduce the disease index of TEB disease incidence, increase the activity of defensive enzymes including polyphenol oxidase (PPO) and peroxidase (POD) in leaves, and reduce the effects of the disease on the aboveground and root growth of tomato. Meanwhile, Bl13 improved soil microbial community structure in the root zone, by significantly increasing the relative abundance of plant growth-promoting bacteria ( and ) and decreasing that of and . The results showed that Bl13 could enhance plant resistance against TEB disease through improving the activity of defensive enzymes in tomato leaves and increasing the number of beneficial microbes in the root zone.
Bl13对番茄早疫病病原菌具有良好的拮抗作用。通过盆栽试验，测量株高、茎粗、番茄早疫病病情指数、叶片中植物防御酶活性以及根际微生物多样性和群落组成等生物学性状，研究Bl13对番茄早疫病的防治效果及其作用机制。结果表明，Bl13能显著降低番茄早疫病的病情指数，提高叶片中多酚氧化酶（PPO）和过氧化物酶（POD）等防御酶的活性，减轻病害对番茄地上部和根部生长的影响。同时，Bl13改善了根际土壤微生物群落结构，显著提高了促生细菌（ 和 ）的相对丰度，降低了 和 的相对丰度。结果表明，Bl13可通过提高番茄叶片防御酶活性和增加根际有益微生物数量来增强植株对番茄早疫病的抗性。
