Growth promotion effects of the endophyte Acinetobacter johnsonii strain 3-1 on sugar beet

文献类型： 外文期刊

第一作者： Shi, Yingwu

作者： Shi, Yingwu;Lou, Kai;Shi, Yingwu;Li, Chun

作者机构：

关键词： Sugar beet;Endophytic bacteria;Acinetobacter johnsonii;Growth promotion;Colonization

期刊名称：SYMBIOSIS （ 影响因子：2.268； 五年影响因子：2.471 ）

ISSN： 0334-5114

年卷期： 2011 年 54 卷 3 期

页码：

收录情况： SCI

摘要： An endophytic bacteriumn identified as Acinetobacter johnsonii strain 3-1 was isolated from surface-sterilized roots of Beta vulgaris. Its effect on sugar beet seedling growth was studied using pot assays and field experiments. This strain promoted beet seedling growth following seed inoculation by seed dipping. Plant height and dry weight of beet increased by 19% and 69%, respectively, compared with controls. Strain 3-1 exhibited the ability to increase absorption of N, P, K, and Mg elements from soil and increase the content of vitamins B and C, and protein within beet. In addition, the strain also produced a phytohormone-auxin, produced nearly twice as much IAA as that produced by strain 2-2, and was able to solubilize phosphates. The concentration of dissolved P in the medium was 180.5 mg L(-1) after 4 days of incubation. In field experiments, strain 3-1 significantly increased the content of sucrose, fructose, and the yield of the beet. The growth-promoting properties of Acinetobacter johnsonii strain 3-1 indicates that this promising isolate merits further investigation into its symbiosis with beet plants and its potential application in agriculture.

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