Sun Meng, Liu Junping, Li Jinghui, Huang Yonghong
College of Horticulture, Qingdao Agricultural University, Qingdao, China.
Laboratory of Quality and Safety Risk Assessment for Fruit (Qingdao), Ministry of Agriculture and Rural Affairs, Qingdao, China.
Front Microbiol. 2022 Mar 3;12:802887. doi: 10.3389/fmicb.2021.802887. eCollection 2021.
Apple ring rot caused by is an economically significant plant disease that spreads across the apple production areas in China. The pathogen infects apple fruits during the growing season and results in postharvest fruits rot during storage, which brings about a huge loss to plant growers. The study demonstrated that an endophytic bacterium isolated from Chinese leek () significantly suppressed the mycelial growth, severely damaging the typical morphology of , and exerted a high inhibition of 84.64% against apple ring rot on postharvest apple fruit. Furthermore, significantly reduced the titratable acidity (TA) content, enhanced the soluble sugar (SS) content, vitamin C content, and SS/TA ratio, and maintained the firmness of the fruits. Furthermore, comparing the transcriptomes of the control and the treated mycelia revealed that significantly altered the expressions of genes related to membrane (GO:0016020), catalytic activity (GO:0003824), oxidation-reduction process (GO:0055114), and metabolism pathways, including tyrosine metabolism (ko00280), glycolysis/gluconeogenesis (ko00010), and glycerolipid metabolism (ko00561). The present study provided a possible way to control apple ring rot on postharvest fruit and a solid foundation for further exploring the underlying molecular mechanism.
由[病原体名称未给出]引起的苹果轮纹病是一种对经济有重大影响的植物病害，在中国苹果产区广泛传播。该病原菌在苹果生长季节感染果实，导致采后果实在储存期间腐烂，给种植者带来巨大损失。研究表明，从韭菜（[韭菜学名未给出]）中分离出的一种内生细菌显著抑制了菌丝体生长，严重破坏了[病原菌名称未给出]的典型形态，并对采后苹果果实上的苹果轮纹病产生了84.64%的高抑制率。此外，[内生细菌名称未给出]显著降低了可滴定酸度（TA）含量，提高了可溶性糖（SS）含量、维生素C含量和SS/TA比值，并保持了果实的硬度。此外，比较对照和[内生细菌名称未给出]处理的菌丝体的转录组发现，[内生细菌名称未给出]显著改变了与膜（GO:0016020）、催化活性（GO:0003824）、氧化还原过程（GO:0055114）以及代谢途径相关的基因表达，包括酪氨酸代谢（ko00280）、糖酵解/糖异生（ko00010）和甘油脂质代谢（ko00561）。本研究为控制采后果实上的苹果轮纹病提供了一种可能的方法，并为进一步探索其潜在分子机制奠定了坚实基础。
