Paenibacillus lentimorbus Enhanced Abiotic Stress Tolerance Through Lateral Root Formation and Phytohormone Regulation

编号 040030605

推送时间 20210830

研究领域 森林培育 

年份 2021 

类型 期刊 

语种 英语

标题 Paenibacillus lentimorbus Enhanced Abiotic Stress Tolerance Through Lateral Root Formation and Phytohormone Regulation

来源期刊 Journal of Plant Growth Regulation

期 第306期

发表时间 20210710

关键词 Abiotic stressArabidopsis thalianaGene expression analysis;  Lateral rootPhytohormonesPGPR; 

摘要 Under the stressed conditions plant growth-promoting rhizobacteria (PGPR) are able to stimulate plant growth through several mechanisms, including antioxidants alleviation, regulation of stress responsive genes and phytohormones etc. Present study is conducted to investigate the impact of Paenibacillus lentimorbus B-30488 inoculation on salinity and drought stress mitigation in Arabidopsis thaliana through modulation in defense enzymes, phyto-hormones and root system architecture associated gene expression profiling. In vitro experiments clearly demonstrated the role of B-30488 in stimulating the root length, branches, lateral root formation and biomass under salinity and drought stress. The inoculation of B-30488 modulated the phytohormones levels to protect the plants from salinity and drought stress. Similarly, defence enzymes were also activated under the stressed conditions, but B-30488 inoculation reduced the antioxidants content during salinity and drought stress as compared to their respective controls. Microscopy results showed decrease in lateral roots hair formation under both stresses and B-30488 inoculation not only mitigate but also enhanced the lateral root formation. Gene expression analysis through real time polymerase chain reaction (RT-PCR) showed modulated expression of several genes related to root development, stress and lateral root formation in B-30488 inoculated seedlings. Results based on the present study, B-30488 is also involved in alteration root architecture, its growth regulation via modulation in phytohormones and genes expression and overall significant improvement in plant growth under stress conditions.

服务人员 孙小满

服务院士 尹伟伦

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