Kim Inhyup, Woo Haejin, Chhetri Geeta, Park Sunho, Seo Taegun
Department of Life Science, Dongguk University-Seoul, Goyang, Republic of Korea.
Front Plant Sci. 2024 Jul 16;15:1417639. doi: 10.3389/fpls.2024.1417639. eCollection 2024.
Biological and abiotic stresses in plant growth are associated with reduced crop yields. Therefore, improving plant stress resistance can be a crucial strategy to improve crop production. To overcome these problems, plant growth-promoting bacteria are emphasized as one of the alternative tools for sustainable agriculture. This study found a novel strain (L3) of a plant growth-promoting bacterium in fermented fruit. Strain L3 showed the ability to promote plant growth. The L3 strain promoted plant growth of subsp. , increasing the length (increase rate compared to the control group, 36.98%), diameter (47.06%), and weight of carrots (81.5%), ultimately increasing the edible area. In addition, we confirmed that plant growth was improved even in situations that inhibited plant growth, such as salinity and drought stress. Strain L3 performed indole production, siderophore production, phosphate solubilization, and nitrogen fixation, all characteristics of a strain that promotes plant growth. Genome analysis revealed genes involved in the growth promotion effects of strain L3. Additionally, the properties of exopolysaccharides were identified and characterized using FTIR, TGA, and UHPLC. Our results demonstrated that L3 isolated from fermented . fruit can be used to simultaneously alleviate drought and NaCl stress.
植物生长过程中的生物和非生物胁迫与作物减产相关。因此，提高植物抗逆性可能是提高作物产量的关键策略。为克服这些问题，植物促生细菌被视为可持续农业的替代工具之一。本研究在发酵水果中发现了一种新型植物促生细菌菌株（L3）。L3菌株具有促进植物生长的能力。L3菌株促进了胡萝卜亚种的植物生长，增加了胡萝卜的长度（与对照组相比增长率为36.98%）、直径（47.06%）和重量（81.5%），最终增加了可食用面积。此外，我们证实即使在抑制植物生长的情况下，如盐胁迫和干旱胁迫，植物生长也得到了改善。L3菌株具有吲哚产生、铁载体产生、磷溶解和固氮能力，这些都是促进植物生长的菌株的特征。基因组分析揭示了与L3菌株促生长作用相关的基因。此外，利用傅里叶变换红外光谱（FTIR）、热重分析（TGA）和超高效液相色谱（UHPLC）对胞外多糖的性质进行了鉴定和表征。我们的结果表明，从发酵水果中分离出的L3可用于同时缓解干旱和NaCl胁迫。
