Epsc Involved in the Encoding of Exopolysaccharides Produced by Bacillus amyloliquefaciens FZB42 Act to Boost the Drought Tolerance of Arabidopsis thaliana

Lü, Xiang; Liu, Shaofang; Yue, Liang; Zhao, Xia; Zhang, Yubao; Wang, Ruoyu

doi:10.3390/ijms19123795

Cited by 54 publications

(28 citation statements)

References 92 publications

(96 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Timmusk et al showed that biofilm formation ability of Paenibacillus polymyxa contributes to enhancing wheat drought tolerance [56]. Lu et al showed that the EPS-encoding gene epsc plays a vital role in Bacillus amyloliquefaciens FZB42 to boost the drought tolerance of Arabidopsis thaliana [57]. In our study, we paid attention to the function of biofilm formation in plant drought tolerance and present several pieces of evidence suggesting its importance.…”

Section: Discussionmentioning

confidence: 79%

Biofilms Positively Contribute to Bacillus amyloliquefaciens 54-induced Drought Tolerance in Tomato Plants

Wang

Jiang

Zhang

et al. 2019

IJMS

View full text Add to dashboard Cite

Drought stress is a major obstacle to agriculture. Although many studies have reported on plant drought tolerance achieved via genetic modification, application of plant growth-promoting rhizobacteria (PGPR) to achieve tolerance has rarely been studied. In this study, the ability of three isolates, including Bacillus amyloliquefaciens 54, from 30 potential PGPR to induce drought tolerance in tomato plants was examined via greenhouse screening. The results indicated that B. amyloliquefaciens 54 significantly enhanced drought tolerance by increasing survival rate, relative water content and root vigor. Coordinated changes were also observed in cellular defense responses, including decreased concentration of malondialdehyde and elevated concentration of antioxidant enzyme activities. Moreover, expression levels of stress-responsive genes, such as lea, tdi65, and ltpg2, increased in B. amyloliquefaciens 54-treated plants. In addition, B. amyloliquefaciens 54 induced stomatal closure through an abscisic acid-regulated pathway. Furthermore, we constructed biofilm formation mutants and determined the role of biofilm formation in B. amyloliquefaciens 54-induced drought tolerance. The results showed that biofilm-forming ability was positively correlated with plant root colonization. Moreover, plants inoculated with hyper-robust biofilm (∆abrB and ∆ywcC) mutants were better able to resist drought stress, while defective biofilm (∆epsA-O and ∆tasA) mutants were more vulnerable to drought stress. Taken altogether, these results suggest that biofilm formation is crucial to B. amyloliquefaciens 54 root colonization and drought tolerance in tomato plants.

show abstract

Section: Discussionmentioning

confidence: 79%

Biofilms Positively Contribute to Bacillus amyloliquefaciens 54-induced Drought Tolerance in Tomato Plants

Wang

Jiang

Zhang

et al. 2019

IJMS

View full text Add to dashboard Cite

show abstract

“…Many PGPR have been widely studied and applied to a wide range of agricultural crops for the purpose of growth enhancement, including increased crop yields, plant weight, and seed emergence, due to their ability to form adverse environment-resistant spores ( Francis et al, 2010 ). In addition to their potential effects on plant growth promotion, PGPR play important roles in induced systemic resistance to protect plants against biotic stresses ( Yan et al, 2002 ; Choudhary and Johri, 2009 ; Rashid et al, 2017 ; Tahir et al, 2017 ) and induced systemic tolerance to many abiotic stresses, especially salinity and drought stresses ( Kaymak et al, 2009 ; Yang et al, 2009 ; Paul and Lade, 2014 ; Lu et al, 2018 ; Brilli et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Induction of Salt Tolerance in Arabidopsis thaliana by Volatiles From Bacillus amyloliquefaciens FZB42 via the Jasmonic Acid Signaling Pathway

et al. 2020

Self Cite

View full text Add to dashboard Cite

Previously, we showed that Bacillus amyloliquefaciens FZB42 can confer salt tolerance in plants by root inoculation under salt stress condition, and the FZB42 volatile organic compounds (VOCs) promoted plant growth and development under non-salt stress condition. In the present study, we investigated the mechanism that allows FZB42 VOCs to confer salt tolerance in Arabidopsis without colonization of plant roots. We found that FZB42 VOCs significantly increased the biomass of Arabidopsis and also maintained the leaf chlorophyll content under salt stress condition. Physiological tests showed that the plant anti-oxidation system was activated by FZB42 VOCs, where higher peroxidase (POD), catalase (CAT), and superoxide dismutase (SOD) activities were detected in plants exposed to FZB42 VOCs compared with non-exposed plants. In addition, FZB42 VOCs increased the leaf total soluble sugars (TSS) content but decreased the proline content compared with the non-exposed plants. Moreover, FZB42 VOCs significantly decreased the Na + contents of the whole plants and induced the expression of genes ( NHX1 ; Na + /H + exchanger 1 and HKT1 ; high-affinity K + transporter 1) that function to alleviate Na + toxicity. Furthermore, analysis of mutants with defects in specific hormone pathways showed that FZB42 VOCs induced salt tolerance in plants by modulating jasmonic acid (JA) signaling, which was confirmed by the up-regulation of JA synthesis, defense-related genes, and JA biosynthesis inhibitor tests. The results of this study provide new insights into the molecular mechanism related to the interactions between plant growth-promoting rhizobacteria and plants under salt stress condition.

show abstract

“…EPS can also promote biofilm formation on root surfaces, thereby limiting the flow of Na + . Recently, EPS production has been identified as involved in the beneficial effect of B. amyloliquefaciens FZB42 in protecting A. thaliana from drought stress [ 213 ]. The wild-type strain FZB42 promotes plant growth and drought tolerance by enhancing the plant survival rate, the plant biomass, root length, and branching.…”

Section: Application Of Pgpb In Salt Stressed Soilmentioning

confidence: 99%

Saline and Arid Soils: Impact on Bacteria, Plants, and Their Interaction

Gamalero

Bona

Todeschini

et al. 2020

Biology

View full text Add to dashboard Cite

Salinity and drought are the most important abiotic stresses hampering crop growth and yield. It has been estimated that arid areas cover between 41% and 45% of the total Earth area worldwide. At the same time, the world’s population is going to soon reach 9 billion and the survival of this huge amount of people is dependent on agricultural products. Plants growing in saline/arid soil shows low germination rate, short roots, reduced shoot biomass, and serious impairment of photosynthetic efficiency, thus leading to a substantial loss of crop productivity, resulting in significant economic damage. However, plants should not be considered as single entities, but as a superorganism, or a holobiont, resulting from the intimate interactions occurring between the plant and the associated microbiota. Consequently, it is very complex to define how the plant responds to stress on the basis of the interaction with its associated plant growth-promoting bacteria (PGPB). This review provides an overview of the physiological mechanisms involved in plant survival in arid and saline soils and aims at describing the interactions occurring between plants and its bacteriome in such perturbed environments. The potential of PGPB in supporting plant survival and fitness in these environmental conditions has been discussed.

show abstract

Epsc Involved in the Encoding of Exopolysaccharides Produced by Bacillus amyloliquefaciens FZB42 Act to Boost the Drought Tolerance of Arabidopsis thaliana

Cited by 54 publications

References 92 publications

Biofilms Positively Contribute to Bacillus amyloliquefaciens 54-induced Drought Tolerance in Tomato Plants

Biofilms Positively Contribute to Bacillus amyloliquefaciens 54-induced Drought Tolerance in Tomato Plants

Induction of Salt Tolerance in Arabidopsis thaliana by Volatiles From Bacillus amyloliquefaciens FZB42 via the Jasmonic Acid Signaling Pathway

Saline and Arid Soils: Impact on Bacteria, Plants, and Their Interaction

Contact Info

Product

Resources

About