Contribution of plant growth-promoting endophytic bacteria from hyperaccumulator to non-host plant zinc nutrition and health.

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-08-26 DOI:10.1080/15226514.2024.2395983

Zhesi Li, Lukuan Huang, Xuan Chen, Qizhen Liu, Yaru Liu, Chanjuan Liu, Chao Yu, Ying Feng

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Abstract

Application of microbial agents is a novel strategy to improve the quality and health of plant, which can be used to increase zinc (Zn) uptake and alleviate Zn toxicity. Here, endophytic bacteria with Zn solubilizing and growth-promoting properties were isolated from hyperaccumulating ecotype (HE) of Sedum alfredii Hance and their effects on Zn absorption and accumulation of non-hyperaccumulating ecotype (NHE) were studied. The results showed that most endophytic bacteria of HE have good Zn solubilizing or growth-promoting properties. Under the condition of 20 μM ZnSO₄, the biomass of NHE inoculated with SaPS1, SaEN2, SaPR2, SaBA2, SaBA3 was 2.8-3.2 times higher than that of non-inoculation control, and the Zn concentration of shoots was increased by 45.9, 89.0, 53.7, 77.5, and 42.6% after inoculation with SaPA1, SaP1, SaEN2, SaBA1, and SaBA2. Under the condition of 100 μM ZnSO₄, inoculation with SaVA1, SaPS3, SaB1, SaPR1, and SaEN3 alleviated Zn stress and significantly reduced Zn concentration of shoots. Therefore, endophytic bacteria can be an effective means of improving plant Zn nutrition quality in the normal condition and benefit plant health in the stress environment.

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高积累植物的植物生长促进内生菌对非寄主植物锌营养和健康的贡献。

应用微生物制剂是改善植物质量和健康的一种新策略，可用于增加锌（Zn）的吸收和减轻锌的毒性。本文从 Sedum alfredii Hance 的高积累生态型（HE）中分离出了具有锌溶解和生长促进特性的内生细菌，并研究了它们对非高积累生态型（NHE）锌吸收和积累的影响。结果表明，HE 的大多数内生细菌都具有良好的锌增溶或生长促进特性。在20 μM ZnSO4条件下，接种SaPS1、SaEN2、SaPR2、SaBA2、SaBA3后，NHE的生物量是未接种对照的2.8-3.2倍，接种SaPA1、SaP1、SaEN2、SaBA1、SaBA2后，芽的锌浓度分别提高了45.9%、89.0%、53.7%、77.5%和42.6%。在 100 μM ZnSO4 条件下，接种 SaVA1、SaPS3、SaB1、SaPR1 和 SaEN3 可缓解锌胁迫并显著降低芽的锌浓度。因此，内生细菌可以有效改善正常条件下植物的锌营养质量，并有利于胁迫环境下的植物健康。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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