Microbial biofertilizers, an innovative and eco-friendly strategy for nutritional improvement, could be utilized for zinc (Zn) efficiency and biofortification. Endophytic bacteria with Zn solubilizing and plant growth-promoting capacities were isolated from hyperaccumulator , and their impacts on the growth and Zn efficiency of cherry tomatoes under Zn-deficiency conditions were investigated. The results showed that most endophytic bacteria promoted the growth of tomato seedlings, while only specific endophytic bacteria played a role in Zn accumulation. Among them, inoculation with SaBA1, SaPS2, SaEN1, and SaPA1 not only significantly increased the fresh weight (FW) of tomato's young leaves by 3.1 to 3.6 times, but also raised the soil available Zn concentration by 0.58–0.92 mg/kg and improved the Zn accumulation in young leaves by 18 % to 30 %. The results indicated that these four bacteria could activate the availability of soil Zn, regulate the distribution of Zn in plants, and enable tomatoes to maintain healthy growth and development under Zn-deficiency conditions. This revealed their immense potential in enhancing crop yield, improving crop Zn nutrition, and boosting crop Zn efficiency.

中文翻译：

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通过接种来自锌超富集植物景天 (Sedum alfredi Hance) 的内生细菌来提高樱桃番茄的生长和锌效率

微生物生物肥料是一种创新且环保的营养改善策略，可用于提高锌 (Zn) 效率和生物强化。从超积累植物中分离出具有溶锌和促生长能力的内生细菌，并研究了缺锌条件下它们对樱桃番茄生长和锌利用率的影响。结果表明，大多数内生细菌都促进了番茄幼苗的生长，而只有特定的内生细菌发挥了Zn积累的作用。其中，接种SaBA1、SaPS2、SaEN1、SaPA1不仅使番茄幼叶鲜重（FW）显着增加3.1~3.6倍，而且使土壤有效锌浓度提高0.58~0.92 mg/kg，改善了番茄幼叶鲜重（FW）的增加。幼叶中锌的积累量增加18%至30%。结果表明，这四种细菌能够激活土壤锌的有效性，调节植物体内锌的分布，使番茄在缺锌条件下保持健康生长发育。这揭示了它们在提高作物产量、改善作物锌营养和提高作物锌效率方面的巨大潜力。