Improvement of salt tolerance of Arabidopsis thaliana seedlings inoculated with endophytic Bacillus cereus KP120

IF 2.6 3区生物学 Q2 PLANT SCIENCES

Journal of Plant Interactions Pub Date : 2022-08-16 DOI:10.1080/17429145.2022.2111471

Yaran Zhang, Zengyuan Tian, Yu Xi, Xiaomin Wang, Shuai Chen, Mengting He, Yang Chen, Yuqi Guo

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引用次数: 4

Abstract

ABSTRACT In our previous reports, an endophytic bacterium, Bacillus cereus KP120 was isolated from the halophyte species Kosteletzkya virginica. In this study, the effect of KP120 colonization on Arabidopsis thaliana seedlings was investigated. Our results showed that inoculation with KP120 could promote the growth of A. thaliana seedlings plants under salt-stress conditions, compared with uninoculated controls. After salt treatment, chlorophyll, proline, the activity of antioxidant enzymes, Indole-3-acetic acid and 1-aminocyclopropane-1-carboxylate-deaminase in plants inoculated were increased significantly but malondialdehyde content was decreased compared with the plants under salt stress lonely. Similarly, under non-salt stress, physiological indices above except for MDA in plants inoculated with KP120 were increased compared with control. B. cereus also induced the up-regulation of key genes involved in IAA biosynthesis, responses, transport, down-regulated expression of genes related with ethylene synthesis and response. Our work principally demonstrates that Bacillus cereus KP120 significantly enhances plant growth and increases plant tolerance to salt stress.

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内生蜡状芽孢杆菌KP120对拟南芥幼苗耐盐性的影响

摘要在我们以前的报道中，从盐生植物Kostelezkya virginica中分离到一种内生细菌蜡状芽孢杆菌KP120。研究了KP120对拟南芥幼苗的定殖作用。我们的结果表明，与未接种对照相比，在盐胁迫条件下接种KP120可以促进拟南芥幼苗的生长。与单独盐胁迫下的植物相比，盐处理后，接种植物的叶绿素、脯氨酸、抗氧化酶活性、吲哚-3-乙酸和1-氨基环丙烷-1-羧酸盐脱氨酶活性显著增加，但丙二醛含量降低。同样，在非盐胁迫下，接种KP120的植物除MDA外，上述生理指标均比对照组增加。蜡状芽孢杆菌还诱导参与IAA生物合成、反应、转运的关键基因上调，与乙烯合成和反应相关的基因表达下调。我们的工作主要表明，蜡状芽孢杆菌KP120显著促进植物生长，提高植物对盐胁迫的耐受性。

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来源期刊

Journal of Plant Interactions PLANT SCIENCES-

CiteScore

5.30

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Plant Interactions aims to represent a common platform for those scientists interested in publishing and reading research articles in the field of plant interactions and will cover most plant interactions with the surrounding environment.