Arid
DOI10.1016/j.scienta.2024.112921
Enhanced salt stress tolerance in tomato plants following inoculation with newly isolated plant growth-promoting rhizobacteria
Abdelkefi, Nourelhouda; Louati, Ibtihel; Mechichi, Hela-Zouari; Sayahi, Naima; El-Sayed, Wael S.; El Nayal, Ashraf; Ismail, Wael; Hanin, Moez; Mechichi, Tahar
通讯作者Mechichi, T
来源期刊SCIENTIA HORTICULTURAE
ISSN0304-4238
EISSN1879-1018
出版年2024
卷号328
英文摘要Salinity is a major abiotic stress that affects the growth and productivity of many crops, especially tomato plants. Plant inoculation with plant growth-promoting rhizobacteria (PGPR) has gained agronomic importance in improving salinity stress tolerance. In the present study, twenty-four bacterial strains were isolated from rhizospheric samples in arid and semi-arid regions of Tunisia, and subsequently, their potential in enhancing plant salinity stress tolerance was studied. The predominant identified taxonomic classes were Bacilli and Proteobacteria. Most of the isolates were able to fix nitrogen, solubilize phosphate, and produce IAA (indoleacetic acid). They also exhibited antagonistic activity against Fusarium pathogens. The strains were screened to assess their salinity stress alleviation potential on tomato seeds and Arabidopsis thaliana under 150 mM salt stress. Strain Gb67 (Bacillus halotolerans) demonstrated significant enhancement of germination parameters in tomato seeds, while strains All3 (Bacillus subtilis) and Gb7 (Bacillus mojavensis) showed a positive influence on Arabidopsis growth parameters. In addition, these isolates enhanced tomato plant tolerance to salinity. Gb67 induced the greatest plant growth promotion in terms of fresh weight (41.85%), plant height (80.59%), root length (66.66%), total chlorophyll content (24.51%), and carotenoid content (64.96%) over the control untreated, followed by All3 or Gb7 inoculation. The selected isolates exhibited salt tolerance traits producing polyamines, volatile compounds, and ACC deaminase. Furthermore, quantitative estimation of exopolysaccharides indicated that Gb67 produced significantly more exopolysaccharides than All3 and Gb7. The findings suggest that the selected Bacillus strains could be employed as PGPR to enhance tomato crop growth in saline agricultural systems.
英文关键词Salinity Plant growth-promoting rhizobacteria Rhizosphere Bacillus Tomato plants
类型Article
语种英语
收录类别SCI-E
WOS记录号WOS:001172576400001
WOS关键词BACILLUS-SUBTILIS ; SALINITY STRESS ; ACC DEAMINASE ; ARABIDOPSIS-THALIANA ; SOLANUM-LYCOPERSICON ; BACTERIAL VOLATILES ; SOIL ; EXOPOLYSACCHARIDE ; DIVERSITY ; MICROORGANISMS
WOS类目Horticulture
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/405546
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Abdelkefi, Nourelhouda,Louati, Ibtihel,Mechichi, Hela-Zouari,et al. Enhanced salt stress tolerance in tomato plants following inoculation with newly isolated plant growth-promoting rhizobacteria[J],2024,328.
APA Abdelkefi, Nourelhouda.,Louati, Ibtihel.,Mechichi, Hela-Zouari.,Sayahi, Naima.,El-Sayed, Wael S..,...&Mechichi, Tahar.(2024).Enhanced salt stress tolerance in tomato plants following inoculation with newly isolated plant growth-promoting rhizobacteria.SCIENTIA HORTICULTURAE,328.
MLA Abdelkefi, Nourelhouda,et al."Enhanced salt stress tolerance in tomato plants following inoculation with newly isolated plant growth-promoting rhizobacteria".SCIENTIA HORTICULTURAE 328(2024).
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